80 Concrete Coasters 👈 16 Silicone Molds 👈 8 CNC Master Models

We had a crazy product order and had to make 80 concrete coasters! Thanks Quikrete for sponsoring this video, check them out here: www.quikrete.com/
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This was quite the adventure - a tale of stress, late nights, success, and failures. Guess that’s what happens when it’s holiday season and a rush order comes in! We had to make 80 concrete coasters for West Elm and we learned a lot about making master models and silicone molds along the way. Hopefully this video is not just a concrete how to but also a mold making how to.
The Precision Board Plus was an AWESOME material to work with. It’s a high density urethane foam but it feels like stone and has a smooth sandable, non-porous surface. It carved like a breeze on our X-Carve. However, we didn’t know until it was too late that the silicone type we got, Mold Star 15, was incompatible with urethane. Automotive primer to the rescue! We use this stuff to smooth out 3D prints all the time but it also made a great barrier between the urethane and the silicone!
Once we got to actually mixing the concrete, that was the easy part! Here are some tips you can use for any DIY concrete project: start with less water than you think - a little goes a long way! Agitate your molds to remove concrete bubbles - you can shimmy and shake em or put a sander next to them to vibrate them. They can be removed before fully cured, but they need to cure before you paint them!
Hope you can apply some of the tips in the video if you’re working on silicone molds, diy concrete projects, or have any concrete how to projects ahead of you!

[@EvanAndKatelyn]

Did y'all know we have *4 channels* now? This main one, plus: 🎮 Evan and Katelyn Gaming kzbin.info (us playing games and chatting, enhanced by epic editing and a heavy dose of memes) 🎙️ Evan and Katelyn Podcast kzbin.info (chatting about life, KZbin stuff, and playing games you can play along with) 😹 Evan and Katelyn Too kzbin.info (still figuring this one out 😂)

[@Kat-bl7dp]

Nice!

[@quickeatwell]

Hi I want to know how to make silicone mould shiny any idea, thank you

[@ALAA11122]

ةل

[@TheMisterEnderman]

What I really love about this video is that you show the complete process of you achieving a product. Along with all the mistakes and things you learned. That is what fascinates me about making things - the process. You start with a plan, gather materials, fail, reiterate, build, fail, plan again, gather different materials, fail, start over, contemplate your decisions in life, and in the end you have a product you can be proud of! Love it! Love your videos!

[@EvanAndKatelyn]

Haha! That contemplating decisions in life is a crucial step. "why did we think we could make so many dang coasters?!?" Thank you! We always love sharing the full process, and it's often a windy one!

[@steveswoodworking2504]

Yes, very nice video! I watched several others with no talking at all, and no product list. In the end, the video wasn't helpful. This video has it all - well done.

[@angespace6079]

It’d be nice to seem them also test their product. I think liquids would just slip right off that coaster no?

[@confuzedgraphite]

Something I’ve found helpful when casting concrete in molds like this is to put them on a wobbly table and attach vibrating back massagers to the table, it helps get the bubbles out and you can just fill and forget until dry.

[@EvanAndKatelyn]

Thanks for the tip! We've done the sanding trick but never on a wobbly surface

[@mart9125]

It's a shame it's hexagonal rather than round because that means you can't.. roll a coaster.

[@EvanAndKatelyn]

....HAH!!!! you win the pun hat my friend! 👏👏😆

[@mart9125]

EvanAndKatelyn Wooo! I shall wear it with pride.

[@Cherishmebeautiful]

hahaha!!!

[@kashhause6362]

😂😂😂😂

[@aliviakay8184]

🤦‍♀️😂😂

[@MichaelKeeter]

Have y'all ever made resin coasters? I think it was y'all that I saw doing the resin ocean and rock looking serving trays.

[@EvanAndKatelyn]

Yep that was us doing the serving tray, and yes we have done resin coasters in this video! It was our first resin project kzbin.info/www/bejne/qpWnd3ejabp3pc0

[@mistythecat3050]

@@EvanAndKatelyn resin time resin time doo doo doo doo resin time

[@Geeksmithing]

UGH. This project is tough to watch, as it brings back all of my failures in trying to cast my Thwomp. I felt for you guys along the way, but the end result is great! Silicone is an easy material when it's easy. :P

[@EvanAndKatelyn]

Haha! "Silicone is an easy material when it's easy". So. True.

[@WinstonMakes]

It's tough for me to watch too, I'm getting drink-coaster-production-PTSD.

[@SouthernStyleDIY]

Such a cool process! It's awesome that you showed how the silicone has held up over time with a ton of use! Plus if something DOES happen to the molds, you have a clean master to make more!

[@EvanAndKatelyn]

That's the beauty of the masters! And those things are still in tip top shape :D

[@juliogarcia8D]

they're so cute together, i need something like what they have

[@amieranaimi]

EnK videos are so wholesome to rewatch again and again and again

[@InsufficientFare]

You guys are the cutest it makes my guts hurt lol. You guys also sound busy a.f and it makes me respect you on a whole different level. Thanks for all the inspiration and cute, but most importantly educational, videos. I just came out of surgery and I'm stuck indoors most of the time now was looking for a side hustle. I think I can make some quickcrete-something with confidence, with all the tips I learned. Sorry for rambling! Love y'all all the way from The Boogie Down Bronx!

[@EvanAndKatelyn]

Hope the hurt guts isn't what landed you in surgery! Also hope your recovery is as easy breezy as surgery recover can be. Quikrete is definitely a good product to start doing side hustle stuff with! If you haven't seen it we have another video called How To Sell Handmade Products that might help with some of the side-hustling. Best of luck to you and thank you for the nice comment! -Katelyn

[@DefeatedAni]

At first I was like “ewww a couple KZbin channel” then after watching “awww they cute, subscribe”

[@EvanAndKatelyn]

Glad you ended up liking the channel! Thanks!

[@SangoUzumaki]

Me: They actual remembered the mold release in a timely fashion? Katelyn: *sprays mold release* *beings coughing* Croaks out "wear a mask". Me: Ah...there we go. The goofballs we love. The human decency that emanates from E&K is so uplifting.

[@erinulrey116]

Things that will also help in the future. Use a transfer cup wgen mixing your silicone. And keep the transfer cup around so you can check the silicone in the transfer cup to see if it's cured before disturbing your mold. Sadly platinum silicone is very finicky (but still great for its own purpose) Also silicone doesnt cure when contaminated with LATEX as well. So dont hard coat master molds with latex! A nice epoxy hard coat will do just fine. Also, silicone cures faster with humidity. So keep a humidifier close to the silicone. And i advise using purified nursery water in the humidifier to ensure nothing will contaminate the silicone through humidity. Youll be surprised how quickly your silicone sets. **for mold repair** So not buy silpoxy to repair molds. Its a waste of money. Its basically the GE brand silicone1 caulking you pick up at home depot. But its two part and costs 50$ instead of 5$. The cheap silicone patch work i did on a complex platinum silicone matrix mold survived 10 more castings. If you have any questions about epoxy and polyester resins (for casting, lamination. Auto body filler a.k a. Bondo, syntactic dough a.k.a. free form air, epoxy clay), Clays (monster clay, chavant, WED and waterclay) and silicones (tin or platinum for molding, casting, painting, and sculpting out of silicone) It is my full time job to handle and understand these products and make quality products that last. I love your guys' channel and would be so happy to help!

[@JackboMack]

Also I’m really happy for you guys that all the patreon supporters don’t fit on the screen anymore!

[@EvanAndKatelyn]

We feel so lucky to have so much support!! It's crazy to go back and watch our old videos with a much shorter list and see how much it has grown

[@allycarter5958]

Cute genuinely love yalls energy in my life, thank you Im so happy for your happiness

[@edmundhayes7982]

Started watching your channel. Great instructional videos. The best part of every one of them is watching how happy you 2 seem to be. Thank you for teaching me so many things and making me smile.

[@EvanAndKatelyn]

Thank you so much! We feel really lucky that we get to do something together that we really like, makes it easy to be happy :)

[@headintheclouds7905]

I relate to the bloopers. Btw I love how you ask us for help and actually use some of the tips.

[@EvanAndKatelyn]

Haha I feel like sometimes our entire video is one big blooper 😅😅 We feel lucky that so many people helped out!

[@Hellnogizmo]

Mixing silicone to make a shitload of coasters with your S/O @ 1am sounds like relationship goals to me! Js. Lol

[@systemofadean]

Language! Lol

[@kommma]

Back then, when you were using concrete instead of resin.

[@AshleyNF]

I love that you guys aren’t afraid to show your mistakes and how you learned from them. Best DIY channel on KZbin! ❤️

[@EvanAndKatelyn]

Mistakes are a big part of learning! Thank you 🙂

[@Pryorfab]

So banter, much funny. Genuinely enjoyed this one! Loved you guys taking us through the learning process! Keep up the awesome work!

[@EvanAndKatelyn]

Thank you!!! There was a LOT of learning on this one. Mold making is still a big challenge sometimes!

[@justinaalves6671]

Your guys interaction with the camera and videography has really changed in a positive way, I really enjoy watching your videos even more!

[@thinkhatch]

Haha, I saw this earlier on Instagram and did not realize what I thought were the coasters were the molds! I like your process and am glad you were able to continually improve your product!

[@EvanAndKatelyn]

Haha those molds would actually look really cute as coasters! Thank you!

[@waaywavyme]

same I thought thoses were the coasters 😂😂 thas the whole reason I press on the video

[@MissTease77]

It’s great to see you being independent of any manufactured Moulds and doing everything yourselves, big thumbs up 👍🏼

[@calolson9572]

*Binge watches E&K videos* “Ooooh - a new one!!” *Binge watches all other E&K videos, just in case he missed one* This is my life. Not sorry. 😁😁😁

[@EvanAndKatelyn]

Haha! Your comment made our day. If only everyone did this, we'd be winning at KZbin! :P But seriously, thank you!!!

[@Lexaloodle]

Love that you guys are learning too. We learn from your mistakes! Thank you 😊

[@EvanAndKatelyn]

The mistakes are kinda the best part when it comes to learning!

[@GMSqueaky91]

Do you guys sell your molds? I was just thinking how cool it would be to make my own coasters, but I can't afford and do not have an X carve, or a 3D printer. I got curious and looked up your guys' tools. Needless to say, I am jealous. Heavily jealous.

[@ConcreteLand]

Concrete tips if you’re interested. Measure your ingredients with a scale including your water. This will give you greater consistency and cut waist down to near zero as you get it dialled in. Use a mechanical mixer. A drill would be better but a countertop kitchen mixer would be the best. When your mud looks mixed it’s really not. If you put it into a mixer and let it run for 10 - 15 minutes straight the water will be evenly distributed throughout. Some commercial ready mix companies plot longer drives to the job to allow for the correct mix time. Try the same “painting” method with your concrete. Mix a small amount of a face coat wetter (use a plasticizer) with less coarse aggregate (sift dry mix) and paint it on. As soon as it gets tacky dump the rest in.

[@jiafeisfloptussy1428]

2:15 in 2020 that hits different

[@davidharvey5672]

Wow those compatibility issues made the job a real journey. I am so behind on material knowledge and it's great to ha e so much new stuff to be amazed by. Thankyou! Happy happy.

[@EvanAndKatelyn]

It was definitely a journey haha. We're learning a lot as we go!

[@BruceAUlrich]

Really cool you were able to source ideas from people on IG. Interesting that it was pretty much just lacking the primer to work properly. And I’m sure you sighed some sighs of relief when the mold still works!

[@EvanAndKatelyn]

It was so awesome! Would have taken us way longer to figure out everything on our own. That's why this community is so great :D

[@aldenallen28]

You can buy a small vibrator motor from mac master and attach it to a small platform and you can use it as a sort of "debubbling" station when you pour each one instead of tapping it. Or make a vaccum chamber.

[@nikosoup7999]

I just realize mold release as in the mold itself I thought it meant to keep out literal mold

[@shelbylawrence7868]

I love watching you Guys. You always have such a bubbly attitude and watching your videos make me so happy and relaxed

[@EvanAndKatelyn]

Thank you so much! ❤️❤️

[@punishedprops]

Great job guys! =D

[@EvanAndKatelyn]

Thanks! We still have much to learn about silicone from the master 🙏🙏

[@rehlorocco]

I found your site while looking for information regarding epoxy resin. I would never cast cement. I just watched it because it is wonderful to see how much in love the two of you are!

[@aryapriyono2212]

You guys are pretty much the happiest couple making a mold. Slightly confusing,,, but what a happy world it would be if everyone have the same energy

[@EvanAndKatelyn]

Haha!! We have a lot of fun working on stuff together even when it's making a mold 😁👍

[@josepablofernandez5045]

Happy birthday Evan 😂 you guys are awesome!

[@EvanAndKatelyn]

Haha thank you!

[@StoneAndersonStudio]

This is great! I’ve heard palm sanders without the sandpaper work really well for degassing concrete. I’d really love to see a video on how to make a DIY vibrating table. Probably would make your lives easier since you’re casting so many coasters! I need to make one to agitate plaster molds I’ll be casting in silicone master molds, just like you’re doing!

[@EvanAndKatelyn]

Yes we used a sander without paper here (you just couldn't really see it because Evan was standing in front). Definitely considering doing a vibrating table - though honestly getting the bubbles out has never been a huge issue for us!

[@NochSoEinKaddiFan]

Maybe a vibration plate would be a good idea? Or adding a vibration unit to your workbench so you just throw a switch and everything goes crazy; crazy smooth that is :D

[@EvanAndKatelyn]

That would definitely save us some time!

[@TimeBombRosette]

@@EvanAndKatelyn An inexpensive way I did it was to use one of those vibrating chair message mats they always sell during the holidays :)

[@dawnm1177]

Omg you two are so much fun lol!! You have a -special- way of teaching!! I spent two days just watching you! Thank you!!!

[@evancashman7614]

Deffinantaly misread the title as 80's coasters.

[@EvanAndKatelyn]

Haha! That would also be awesome. I bet there would be bright colors and glitter involved

[@TedOfNod]

Definitely

[@BobMuir100]

I say chaps, they are stunning coasters, really very good.

[@SeanBMakin]

Love the music and you guys are my new favorite channel! Very inspiring, I found you guys today right when I was about to give up and quit trying to build my business, thanks

[@EvanAndKatelyn]

Thank you so much! And thank you for the Patreon support too! I hope you pick up working on the business again 🙂

[@styler19721]

This was a lot of fun to watch. If you vibrate the concrete with a sander after you pour, the air bubbles will dissipate.

[@EvanAndKatelyn]

Thank you! Ah yes, we did do that but I can't remember if it made it into the edit or not haha (it's been a bit since we edited this one!)

[@Caroline-qt4gq]

katelin says " wear a mask! " i say in my mind " how did she know corona is coming ..."

[@nordicadodge3830]

Okay I was just going back to your old videos and I just want to point out how much y'all changed. These older videos and your more current ones are 10/10. They are just a little bit different. Finger lickin' good.

[@ZacJones]

Great concrete project guys! Unique idea too, I like how you used the CNC machine to make your forms!

[@EvanAndKatelyn]

Thank you!! The CNC definitely saved us, especially since we were in such a time crunch!

[@olioliwoo]

So satisfying seeing the molds still being good all those months (and coasters) later!

[@EvanAndKatelyn]

They've really held up well (thank goodness!)

[@spoopypoods7485]

haha i love seeing you guys having a lot of success! So genuine.

[@spoopypoods7485]

aw yess firstt

[@EvanAndKatelyn]

Aww thanks!!! Tyler Moses got first comment this time though lol, though second is still pretty awesome!

[@spoopypoods7485]

EvanAndKatelyn to be honest i would still be pretty happy if i would have gotten third.

[@iseeyou4622]

They made a mold to create a mold brilliant!

[@ShadowVipers]

5:29 HHHHNNNNNNGGGGG....... CLIFFHANGERS! Edit: Also Happy Late Birthday to Evan! (I don't know when it was filmed)

[@EvanAndKatelyn]

Haha! Thank you! That part was filmed back in December when we were scrambling to make our order in time!

[@MichelleRaine]

I know this is an older video but I have been binging and YALL SHOULD totally make custom cool tiles and tile a back splash or a bathroom or something! That would be so awesome! You guys are so great I’m always laughing and I really appreciate being brought along for the entire journey and not just the stuff that works! ✌🏼 big fan

[@JackboMack]

I love the thumbnail. It’s like.. “yeah, we made too many coasters we don’t know what to do with them”.. hahahah

[@spoopypoods7485]

Jackbo M hahah

[@EvanAndKatelyn]

lol, guess we should sell some :P

[@ChrisLevelsUp]

I'm happy for you two!

[@megantron98]

Would love to buy some of these. Love you guys and thanks for showing us the process. So cool to watch. Heard about you two on the Making It podcast and had to check y'all out! ♡

[@EvanAndKatelyn]

Thank you so much for coming by to check out the channel!

[@skewedmaker]

Great video! Wonderful to see how the power of the Maker community came to the rescue. Thanks for sharing the trials and tribulations, glad you found a formula that works

[@EvanAndKatelyn]

The maker community is such an awesome group of people :D Glad you like the video!

[@aristothethrone9032]

this reminds me of when a friend was trying to make a bunch of gems for steven universe cosplayers. she made the gem plates out of resin but they were too thick. she thought if she angled the facets that it could start to cure as she poured in more. she had to abandon the part of putting led's behind them. and just 3D printed them. but she had to do twice as much work sanding them to get rid of the lines. I wonder how much primer and a different mold would have helped her out.

[@EvanAndKatelyn]

we LOVE Steven Universe! Oh man and yep, we can relate to all that work finishing the 3D prints!

[@concreteandcopperco4666]

Sweet! I love how these turned out, thanks for showing your process!

[@GetHandsDirty]

Loved this video! Always get good vibes when watching you guys making and messing with stuff :D And those t-shirts omgggg I think I want both!!

[@GetHandsDirty]

Just ordered the two designs!! 😍😍😍😍😍😍😍Just would be cool if they can be shipped from Europe to avoid import taxes. BEST SHIRTS I'VE SEEN ON THE MAKER'S SCENE! Hah

[@EvanAndKatelyn]

AHH THANKS SO MUCH!!! We always get good vibes watching your videos and the art you make :D Hmm, I think the back end system we use can potentially ship from Europe, we'll look into getting it all setup just in case we come up with another cool shirt you might want!

[@jaxxonkoethler3001]

NERDS! I Love it. I was wondering if you could make a medieval chest? 3d printed? Cast in concrete? Fires a laser?

[@EvanAndKatelyn]

All of those things sound amazing

[@harleyhaynes]

If you guys are going to be making lots of silicone molds you may want to look into vacuum chambers to make your molds void free. They are not to expensive. Fun to watch! Great job!

[@EvanAndKatelyn]

That's definitely something we are considering! Thank you and glad you like the video!

[@lesleycapul8073]

Just discovered you guys after finding you in my recommendations and definitely subscribing! Anyone know how I can buy their coasters? After seeing this video, I'd love a set

[@EvanAndKatelyn]

So glad you found us! Thank you for subscribing!! We used to sell the coasters on Etsy but right now we only sell them to West Elms in Texas. Every now and then we'll do a limited Etsy run though 😁👍

[@StudioJLT]

So much fun! You can also de-gas the silicone in a pressure pot if you needed to make more molds.

[@EvanAndKatelyn]

Ah that's a great idea! Thanks!

[@InfiniteCraftsman]

Haha! Happy birthday! 😘🎁🎊🎉🎂

[@EvanAndKatelyn]

What a way to spend a birthday! :P

[@InfiniteCraftsman]

Hahaha!!! I just started listening to the Patreon after show and I’m cracking up over my comment now!!!

[@FigmentsMade]

Oooo. Silicone pours.... I love that you include your learning processes. One of these days I'd love to play around with some silicone molds and I'm learning all of the things not to do! Great video! And now to head over to the After Show! Which is always so much fun!

[@EvanAndKatelyn]

Haha I feel like we mess something new up every time we use silicone but dang it's satisfying to pour! You should definitely give it a shot - gotta start sometime! Just.. start with oomoo 30 instead of mold star 15 👍😁

[@FigmentsMade]

EvanAndKatelyn Cows, not stars. Got it. 😉

[@InfiniteCraftsman]

Now make a settlers of Catan board!!!

[@EvanAndKatelyn]

we actually have been thinking about a foldable chess board! Well Evan has, I don't know how to play chess so I'll leave that one up to him :P

[@NochSoEinKaddiFan]

The Siedler-pieces have basically your coasters as the base, so the idea is not as far fetched; unless you start counting the miniatures going on top, but still ;)

[@ice-coldsnowman8412]

Great video guys. You should try using an old electric toothbrush handle to vibrate the concrete to get the bubbles out. Works great on smaller casts

[@EvanAndKatelyn]

Thank you!! That's a great idea, would be a lot less cumbersome!

[@mishmash906]

Who else’s video glitched at 11:34? Did I get anyone??

[@ankneeboo]

yes unfortunately... :(

[@frog4701]

K L That’s the joke.

[@daniellephillips1554]

you could definitely make cute starter trays like that or just small individual pots for like succulents. that would be heckin cute

[@Jojo27.2]

Im pretty sure all concretes only need water to work... I think that brand just cures faster

[@billysmether6237]

Great Video!!!! Don't let anybody tell you it was to long, that's what the pause button is for. All I can add is when you mix, whether it's silicone or resin, use a third container for the final mix.

[@EvanAndKatelyn]

Thank you!! Glad you didn't think it was too long. Thank you for the tip about the third container! Is that so you leave a similar amount of both parts behind in their original buckets instead of just leaving behind a little bit of one part in its bucket?

[@billysmether6237]

Yes! If your against using a third container, don't scrap the side of the container when your pouring into the mold. It is a common habit. People usually don't start with enough product (cost), and then scrape the sides of the container to get every last drop, and this is where the unmixed product hangs out and ends up in the mold.

[@somebodyelse286]

"wear a mask!" that joke aged poorly, i think we'd all agree

[@OregonDARRYL]

When applying spray primer - use a small brush to work the primer into spots that are hard to hit, and move around the excess into the thinner areas. The resulting smooth surface should help with your molds. Thanks!

[@thedistractedmaker]

Super! It's great that you share all the ups and downs, not just the A to B everything is perfect... ;-)

[@EvanAndKatelyn]

Oh yeah there's always stuff that goes wrong - were often doing things for the first time on camera so it's inevitable!

[@franscoisprinsloo3403]

Man that little CNC toy you have there is AWESOME!

[@EvanAndKatelyn]

it really is handy!

[@kodweb]

I used to work as a bricklayer so know a little tiny bit about cement you had a tiny bit of washing liquid it will make the concrete cement flow better I think it breaks the surface tension of the water and put tiny tiny bubbles in the mix which makes the cement slide better between itself which also means you put less water in the mix so reduces the curing time you could also Pat glass fibres in your mix to make your coasters super strong

[@EvanAndKatelyn]

Never heard that tip about the washing liquid, we'll have to try that sometime! We've definitely been wanting to try mixing in the fibers - might try that if we do a bigger build, like a table top

[@kodweb]

EvanAndKatelyn yes you can use a mortar plasticizer like this www.screwfix.com/p/cementone-cemplas-mortar-plasticiser-dark-brown-5ltr/63831?tc=LB6&ds_kid=92700024762949181&ds_rl=1245250&gclid=Cj0KCQjwyYHaBRDvARIsAHkAXcttzhtWyV5lCoD1SY51VeqOFl2vnBOFuQYMxkBXPPMZ22jErbiDVdcaAi5mEALw_wcB&gclsrc=aw.ds&dclid=COHl5tWEjtwCFUauUQodPU0CVA but when we ran out and don't have any plasticizer we would use dish soap only a couple of drops

[@FarazMKhan]

They are all business in just one video, actually very smart. 🤔 - Earned from orders - Earned from sponsors - Earned from this video - Earned from aftershow - Earned from pateron - Earned from t-shirt

[@AnnaGoesOutside]

Love to see how your channel(s) have grown since originally posting this video! Me & my sister love your channel !

[@EvanAndKatelyn]

Thank you!

[@anonymouschange287]

You should tile a room with these but creative resin pours not concrete

[@AnthonyLoPrimo]

Oh lordy I wish I had space to do this stuff. You two always look like you're having a blast, even when things are going wrong lol

[@EvanAndKatelyn]

Thanks! When things go wrong we just remind ourselves that we're still making stuff together, and making stuff together is fun 😁

[@AnthonyLoPrimo]

@@EvanAndKatelyn That, and in general you seem to have fun throughout the entire process, even with just making the entire video, too. It's quite inspiring and in some ways I kind of value these videos above ILTMS and Jimmy Diresta's content. THey're equally informative, but your content really does help make things FUN while still being equally engaging and informative :D But alas for now I'll keep with the programming side of things. Not quite the same 'working with my hands' projects I had in mind, but equally rewarding at times!

[@GaryMcKinnonUFO]

When your mixing silicone it's best to do it in a large bucket witrh a drill that has a plaster-mixing head, then you don't get uncured areas.

[@mikkomonte3738]

could create a lot with colored cement and stick it to the walls or as a pathway. 😍

[@EvanAndKatelyn]

We really wanna try colored cement sometime!

[@BossmanEight]

Suggestion: Use a quarter sheet sander to vibrate your molds. Place a number of molds on a small piece of plywood. Fill molds with grout. Vibrate the wood sheet by placing the sander on the edge of the wood for 10-15 seconds. Oh, yeah . . . . Do this on your *next* project.

[@EvanAndKatelyn]

We actually do do that most times and it works great! I think we did it in the project but breezed over it

[@finnigan16]

Awesome tutorial (As usual)!! I do a lot of mold making and casting at work. We use a lot of 2 part urethane and silicone. We found the best way to handle the compounds (especially when the mix ratio is by volume) is with large plastic syringes. You can find large packs of them on Amazon or Ebay for next to nothing. Use a separate syringe for part A and Part B, Stick the nozzle in and pull back the plunger to fill. Really cuts down on the spillage, and increases ratio accuracy. If your mixing by weight just use the syringes to transfer into a cup on a scale.

[@EvanAndKatelyn]

Ah thank you so much for the tip! How big are these syringes??

[@finnigan16]

@@EvanAndKatelyn Most of the time we're potting connectors or cable splices which doesn't require a huge batch size. We use different sizes depending on the application and the mix ratio. The largest we use is around 200 mL for part A and B, to make a 400 mL batch total if it's a 50:50 mix.

[@EvanAndKatelyn]

Thank you!

[@elq.c]

I'm always sad when I binged Evan and Katelyn so much and now I don't have anything to watch. 😢😂

[@EvanAndKatelyn]

❤️❤️ Have you checked out our other channels? We have a gaming channel ( kzbin.info/door/sM--5bs5DdDVpALDPXUiiw and a podcast ( kzbin.info/door/7jrAKjLqAP9z5p8edPzHlQ )

[@mikewhipp2984]

First thought after seeing the title of the video... Wow, that's a lot of coasters. Evan and Katelyn are seriously ocd about glass stains on their tables. The coasters look great. I like the little splash of color. Well done

[@EvanAndKatelyn]

Hahaha! Hey, when you make your own coffee table, people best not be putting their drinks on your hard work! 😋😋😋

[@JohnSmith-il4wi]

If you switch to Rapid Set concrete (in the red bags) you can put the dry concrete in the molds, tap or vibrate for settling, then spray a light mist over the powder until saturated. Should set fairly quickly without having to deal with pre-mixing wet concrete and trying to get the air bubbles out. (and clean-up should be easier. Only thing you'll have to figure out is how long to mist it for the moisture to get all the way through.

[@SleepStarvedNerd]

You guys need to make a vacuum chamber. It really helps to get ALL the micro bubbles out for a totally smooth finish.

[@EvanAndKatelyn]

We got to use one when we collaborated with Punished Props and it was awesome!

[@tylerthewizator]

I enjoy learning about this stuff soo much, and hope one day I get to do it and put my knowledge to use!

[@EvanAndKatelyn]

it's a lot to take in but when you're at a point when you're ready, you'll already be more prepared than most!

[@canvaskate7571]

Finally, someonebwho spells Katelyn the same as me! Stumbled upon y'alls channel and now I'm hooked!! Can not wait to get to work trying some of your suggestions.

[@EvanAndKatelyn]

Thank you so much fellow Katelyn!

[@matthewduke4233]

Really cool machine and an awesome video made by two awesome people

[@EvanAndKatelyn]

Thank you and thank you! :D

[@markmallred]

Someone may have already said this, but one of the good things about priming / clear coating your master is that you can give it a matte / satin / gloss finish depending on what you use, and that finish should transfer to your mold and what you cast in it. Also, if your master's porous it can help stop silicone getting stuck in the pores. You can also get primer that's safe to use on polystyrene which is helpful if your master's made out of something that's prone to dissolve with standard primer.

[@EvanAndKatelyn]

Those are some really great tips! Would love to do some tests with matte/gloss.

[@markmallred]

I'm not sure how different it'd come out in concrete, but for resin it's good. I did a project where I had to cast candy, and the silicone molds and resin casts kept the different finishes of the different candies. It's pretty amazing the detail that you can get. Thinking of it though, in buildings you quite often see concrete that's been moulded in plywood boxing and it's taken on the grain pattern of the wood, so concrete may well gloss up if your original master has a gloss finish.

[@EvanAndKatelyn]

I know we've don't castings in shiny plastic molds and it came out glossy like the plastic so I think you're onto something!

[@melissalin6969]

i love the editing to the beat it's sooooo satisfyingggg

[@EvanAndKatelyn]

Haha thanks!

[@hansvonstetten3236]

to remove the air bubbles I use a hammer drill with a very dull bit on a piece of metal...really works fast and gets all the bubbles

[@EvanAndKatelyn]

Ooh yeah I could totally see that working, thanks!!

[@AM.000]

Suggestions if you haven't already bought them.... A drill bit mixer. And a vibrator.... for the bubbles! If you are trying to get the bubbles out of the concrete, you will need the mix to be a bit more moist/runny/higher viscosity for the visual areas or to work faster... You can also try different water tempetures.

[@EvanAndKatelyn]

Thanks! We've used a sander to vibrate out the bubbles before and that worked pretty well. Never experimented with different water temperatures, that's really interesting!

[@AM.000]

@@EvanAndKatelyn going colder with water should give you more working time. Which should result in a longer period of higher viscosity to vibrate out the bubbles. It won't impact strength (nor crack) unless you are curing in a below freezing environment.

[@josefvanwyk1042]

Awesome....thank you for making this video

[@heyimamaker]

Three things that I would like to play with, X-Carve, Cement, and Silicone moulds. Thanks for the tips!

[@EvanAndKatelyn]

You're very welcome!

[@janinemeehan6568]

Awesome work all around. I loved watching you guys and enjoyed your rapport together and with your Viewers. xx

[@EvanAndKatelyn]

Thank you so much! Glad you like the channel!

[@cyndihughes2012]

You guys are AWESOME! First time watching.