How to Make a Rubber Mold to Cast Concrete Pavers/Stepping Stones

This video tutorial details the process of making a Poly 75-70 polyurethane rubber mold of a concrete stepping stone. In this example, we utilize the "poured block mold technique", which is considered to be one of the most simple mold making methods.
Although the stepping stones in this scenario can be easily replaced through options at retail stores, this mold making method is great when you have a unique stone that is not replaceable OR when you'd like to produce custom pavers from your original design (made from wood, clay, a printed model, etc.).
A full list of materials and tools used for this project can be found at the end of the video.
The Steps:
1. Select a Model [0:32]
2. Apply a Sealing Agent (Poly PVA Solution) [0:53]
3. Prepare Model and Construct Mold Box [1:24]
4. Apply Release Agent [3:33]
5. Calculate Amount of Rubber Needed for Mold [4:13]
6. Measure, Mix & Pour Mold Rubber [5:03]
7. Demold [6:29]
8. Cast Concrete [7:24]
www.polytek.com
/ polytekdevelopmentcorp
/ polytekusa

[@googleuser569]

So dumb of many individuals whom rather write a negative comment on this video than a positive. You all negative peeps tend to know so much and yet do not make videos yourself. Obviously watching this video for a reason, because you simply do not know how. GREAT VIDEO AND YOUR TIME AND KINDNESS IS GREATLY APPRECIATED!

[@shakes525]

This is EXACTLY what I've been struggling to find! I started with some pavers I like alot, but was forced to pause construction of my patio. In the meantime company went out of business and I cant even find pavers that are readily accessible that are the same dimensions let alone look! This is PERFECT! THANK YOU!

[@user-id7zw1zb4w]

The best video ever! Thank you🙏 finally i found real instruction how to calculate rubber quantity needed❤

[@Grandpaw2511]

Fantastic!!! I have some old plaster garden plaques that belonged to my granny that are too fragile to put out. This will allow me to make a mold of them and put the copies out. Thanks.

[@Wacky_Whimsy]

That is absolutely amazing - thank you so much for such a detailed video with so much information. I'm so very appreciative!

[@jitendrapathak732]

?

[@johnhardynet100]

Excellent instructions. Thank you.

[@jonfox1919]

I think some of the comments here are taking this project a bit too literally. Yep, it's a heck of a lot of time and expense to copy one ugly paving slab but that's not the point; it's a demonstration of potential. Using these methods and materials you could make some pretty unique cast concrete pieces, beyond practical limitations the only boundary is your skill and imagination. I'm inspired enough to give this a closer look. Thanks for the video Polytek.

[@PolytekDevelopmentCorp]

Thank you for watching, and for the feedback, Jon!

[@patrickmihajlovic4112]

You dont realy expect "...skill and imagination", after reading theyr comment's !??? 😂

[@user-vz7cq6nf7p]

i'm whole heartly supporting this comment as i'm trying to made valentine chocolate shaped concrete decorations and this helps immensely

[@sherierodrigues1569]

Oh dear! I am so happy envious of this lucky lady that had that made for her. I would like one the same, and could you please bring the mold with you. I think I am funny. No offence ment. Sherie Rodrigues from Australia. (70) Going to try though, with help of course. Thank you for sharing this. Bye

[@willahelmpowers4835]

Thank you for the video instructions. I like the way you clamped the mold frame & saw your other reply about it also being adjustable that way. I was looking for a way to make a mold to put a stone pattern on concrete fence gravel boards & concrete posts. Which this should allow me to do and of course lets you make a mold for many things, so thanks again.

[@UtahTabby]

I would use this technique to copy an antique or ancient stone that wouldn't be available as paver in a hardware store. It would be perfect for 'one of a kind' restoration situations.

[@isaachart9545]

Awesome video, awesome product. One thing I might add is that applying release agent to the bottom edge of the melamine sidewalls of the form might prevent rubber from getting between the bottom board and the sidewalls. Clay on the outside prevents rubber from leaking out but it can still seep down there, making demolding a bit of a chore.

[@1kiffertom1]

fantastic! thanks! pour the rubber over the negative comments and forget to demold!

[@billcoley8520]

I see the negative comments are poring in. This video is not saying you must build this, it’s not even recommending that you do this. The purpose is to give instructions on how to build a copy of ANYTHING you might want or need to copy. With that said have a wonderful pessimist life.

[@anthonybixenman3418]

* wonderful pessimistic life ;)

[@bullsh3176]

Actually, for myself, based on the cost of all the time spent and materials purchased, it appears as if just buying an already manufactured mold, would be a better option. Just my opinion.

[@mr.c6674]

@@bullsh3176 , only if that already manufactured mold is exactly what you want. Otherwise, this provides endless options.

[@christopherkelly6523]

@@bullsh3176 LOVE the DIY Process.

[@lawrencendungu2439]

one of the most educative videos i have seen on youtube!!!

[@shahulhameedpvs7536]

Thanks brother 😍Very good 💡 ideas

[@googleuser569]

Really awesome

[@taniamoreno8972]

I love the idea!!!!

[@globelbusiness2242]

A sart a plants

[@jtltet]

So, after all of that is it cheaper to do this as opposed to buying a stepping stone from the box store? Of course, I'm talking about doing a new walkway or patio as opposed to trying to match one paver from an old patio.

[@silentrage2285]

Good video.

[@mendoza5569]

You make a good Job

[@hhattingh]

I am very new to this but was wondering how heavy is this rubber? Reason for asking is i want to cast molds from blow molded tool trays. They are relatively sturdy however the can crack. Thank you.

[@HalehJune]

Thank you!!

[@bakirefaridah5730]

This is a great process❤

[@rodgerroelf6986]

The video is how to make a mould of anything u want too and not about making pavers...its about the product u use to make a mould... Clearly some don't get it.

[@belindazart]

Thanks for the great video. Could I use something besides a wooden box to create a mold? I have a small paver as my model and was thinking I could use a medium-sized plastic container.

[@GetRealwithMike]

Wish you would this with a herringbone design

[@stephencraig7130]

Great video! Please wear a mask 😷

[@daenuriornamentartgrcconcr3981]

whether raw materials have been entered the market in Indonesia sir

[@DenverChiropractor]

Used motor oil is a good release agent for concrete

[@jesse977]

How many times can you reuse the mold?

[@zaroonbukhari4715]

Dear brother! Which mold ( Rubber or Silicone or polythene ) is best and long lasting for cement ( concrete ) usage

[@baburaj6412]

This possible to make from Pepples and cement,,,,,,?

[@amaradumbuya2099]

Great for the third wirld it all about speed

[@jakartaindonesiachannel7238]

Very good👍🙏

[@angbinhingbuhay6933]

What kind of product the Part A?

[@Painfulwhale360]

Roughly how many times could one of these molds be reused?

[@ramarajuborukati1340]

Very good

[@OHSYearbookVideos]

Great job on the video instructions! Thank you for taking the time to do a professional job. I have some wood from an old barn we took down on our farm that I think would make beautiful pavers; however, I feel framing and other inside projects would be a better use of this beautiful wood. Making a rubber mold of the wood allows me to do both. Would this process work with wood, and, if so, will I need to modify the ingredients or amounts given in the video?

[@PolytekDevelopmentCorp]

Thank you for watching! Absolutely - this process also works well on wood, but careful preparation is key. Although the shape of the wood piece may be a bit different, this video will help with the basic steps for making a mold of wood: kzbin.info/www/bejne/e4q6aYVprqpkias

[@OHSYearbookVideos]

@@PolytekDevelopmentCorp Thank you so much!

[@globelbusiness2242]

Hello this plant amount sand message whatsapp [phone]

[@patrickmihajlovic4112]

Are these molds good for pouring resins into em to ?? Planning to diy some "custom-tiles" for my bath......

[@PolytekDevelopmentCorp]

Hello Patrick - Thank you for watching! Certain resins (e.g., polyurethane plastics) can be poured into polyurethane molds with the proper release agent (e.g., Pol-Ease 2300 Release Agent).

[@shannonmarshall9707]

How much product is used to make one of these paver molds? Would the 4lb or the 16lb kit work? Thanks!

[@PolytekDevelopmentCorp]

Hello Shannon - we used about 11 lb of mold rubber for this project, but the amount you'll need will vary depending on the size of your model.

[@danlego7525]

How about a tutorial for cement log siding molds

[@he-manmasteroftheuniverse2501]

You could probably make concrete stamp molds the same way huh?

[@TheGalacticWest]

Neat! but for being made 5 years ago it sure seems like the commercial is about to end to bring back jeopardy on my square tube tv.

[@1414141x]

How does the hard mould rubber you used in this video compare to ABS plastic moulds for longevity ? How many times could you use the rubber mould before it became unusable ? Thanks for an interesting video.

[@PolytekDevelopmentCorp]

Hi Chris - Thank you for watching! It very much depends on the mold design and what material is being cast into the mold, but generally, you can get hundreds of concrete castings when the proper release agent is used and when the mold is well taken care of.

[@thomasgraham2654]

Is your 1-1 mixture for 11lbs 5.5 of 1a and 5.5 lbs 1b for 11lbs

[@farooqmisrial2009]

good

[@TheSeabeemike]

do you have suggestions on how to vibrate the mold if you do not have a special device like yours to do it?

[@nobodydoesithalfasgoodasyou]

Put an unbalanced laundry load in your washing machine and leave the slab on top during the spin cycle

[@christopherkelly6523]

What is the "Wood" used to make the Mold?

[@barefoot69]

Thank you for the music - that really helped

[@AnthonyMassey]

Could the Poly 75-70 be used to make stamping pads?

[@PolytekDevelopmentCorp]

Hi Anthony - Thanks for watching! Are you referring to stamping pads/mats for concrete stamping? Or a different application?

[@balloney2175]

5 thumbs up!!!

[@grassulargranite]

There are some stultifyingly short-sided comments on here about this video. I am totally inspired after watching it! I want to make concrete “pavers” from ceramic sculptures I’ve made that appear to be large fossils and archeological pieces. This is the exact information I need to know. One question, a comment on here mentioned using diesel fuel as a release agent. Would that not attack the material of the mold?

[@PolytekDevelopmentCorp]

Thank you for watching, Belle! We would not recommend using diesel fuel as a release agent - there are a number of concrete release agents available and we manufacture one as well (Pol-Ease 2650 Release Agent).

[@BobbyIronsights]

I think the first step should be going down to the home reno center and finding a much nicer paving stone to copy.

[@walterbeech9690]

Is this rubber hard enough to make a stomp mold for slabs? Really neat vid!

[@PolytekDevelopmentCorp]

Hi Walter - Thank you for watching! This product can be hard enough in many cases - we do have additional products that are great for a variety of stamping/texturing tools. Here is a specific stamping tutorial: kzbin.info/www/bejne/qKDQiKumepx-h6M

[@JosephLorentzen]

Good job. What did the mold cost? What is the maximum number of bricks one could cast from the mold before it wears out?

[@PolytekDevelopmentCorp]

Hi Joseph - Thank you for watching! This mold required ~11.2 lb of Poly 75-70 Liquid Rubber. A 16-lb kit of Poly 75-70 currently costs $143.00. This cost doesn't include any other supplies, including release agents, tools, mold box materials, concrete mix, etc., so the cost could fluctuate depending on what materials you already have on-hand. It's difficult to say how many castings you will get in total - it varies depending on a number of factors - the design of the mold, the use of proper release agent, mold maintenance, the concrete mix, etc. We have seen customers get hundreds and thousands of concrete parts out of a single mold.

[@nickduffy8482]

Manic music couldn’t take any more.

[@williamhartzelljr.9080]

And what did all the chemicals cost for this project?

[@omarcabriales6138]

How much do those buckets cost?

[@billcoley8520]

After everything is said and done, supposing that the slab cost $5 how many would you have to make to recoup the mold material cost. And approximately how much was the material to make a slab?

[@PolytekDevelopmentCorp]

Hi William - Thank you for watching! This mold required ~11.2 lb of Poly 75-70 Liquid Rubber. A 16-lb kit of Poly 75-70 currently costs $143.00. This cost doesn't include any other supplies, including release agents, tools, mold box materials, concrete mix, etc., so the cost could fluctuate depending on what materials you already have on-hand.

[@edgarh252]

Around how much does material costs to make each one?

[@PolytekDevelopmentCorp]

Hi Edgar H252 - Thanks for watching! For the mold itself, it took about 12 lb of Poly 75-70 Polyurethane Rubber.

[@ntonychhetri6968]

How to know what you added? You have told anything about the materials what and how much to mix.

[@tannis43]

It said in the video one part A, one part B, i.e. parts A and B of the rubber are mixed in a 1:1 ratio. edit: describes this at 4:41

[@juanarmenta849]

On average, How many times are you able to cast the rubber mold?

[@PolytekDevelopmentCorp]

Hello Juan - It very much depends on the mold design and what material is being cast into the mold, but generally, you can get hundreds of concrete castings when the proper release agent is used and when the mold is well taken care of.

[@creatorvenue237]

Hello jaun proper use cast more than 100 times

[@parthpatel9814]

I want it in India

[@edmedina5281]

Can I just buy the mold..😁where

[@russsherwood5978]

what would it cost in a ball park figure to set up a home based bussiness, with the vibrating table? just found your channel an subbed+thumbs-up, thank you for the video,, be blessed an safe

[@hi-ccowboy7983]

For the vibrating table, procure an old washing machine. Epoxy a brick inside the tub to create the vibration. Stand back.

[@carlarmes8364]

Love the video tutorial, shame about the annoying music. Music is as bad as the ones I make.

[@sarabar2259]

sir your are mixing two chemicals one is poly 75-70 liquid and another chemical name sir? kindly send mixing ratio .

[@PolytekDevelopmentCorp]

Thank you for watching! Poly 75-70 Part B pairs with Poly 75-Series Part A.

[@orlandopaz9155]

que matrial usastes amigo para est molde?

[@paulchaney7728]

"¿usastes?" ¡que barbaro!--Usé, usaste, usó . . .ay.

[@orlandopaz9155]

SON PALABRAS COLOQUIALES AMIGO, ES IRESPONSBILIDAD QUE VENGAS A QUERERME CORREGIR. TENDRIAS QUE VIVIR ACA PARA QUE VEAS QUE ASI DECIMOS ACA. SUERTE PARA LA PROXIMA. Y MAS RESPETO.

[@paulchaney7728]

Pues, un Cubano que fue maestro, me regañó por haber usado lo mismo. Tapó sus oidos con sus dedos y cerró sus ojos cuando hablé así. ¿Pero que se yo? Solo empezé aprender español en 1963.

[@daveklebt7732]

based on this, I think I can complete that 10 x 20 sqft area and the walkway to the street in about 14 months. each block will take approx 2 days. how long did it take to build the pyramids?

[@seedubyu]

I think he oughta do a 20 ft x 20 ft casting of a patio, save fking about.

[@chynesteban3309]

You used two buckets to make the rubber. Please what is the second one. Thank you.

[@PolytekDevelopmentCorp]

Thank you for watching, Jose - this is a two-part polyurethane rubber, so Part A is added from one bucket and Part B is added from the second bucket.

[@salehahmed5826]

50-50 ?

[@chynesteban3309]

Thank you very much.

[@PolytekDevelopmentCorp]

Hi Saleh - Yes, it's a 1 Part A : 1 Part B mix ratio for this product (Poly 75-70). Other product mix ratios will vary.

[@dennismanary9839]

Uh, a rough idea of the cost per "manufactured" paver vs material cost of "cast your own"? Just 'typical' home center pavers. (Not counting mold materials, of course.). Thank you.

[@twistedworxengraving7920]

Can you reuse the mold box? Or is it one and done?

[@PolytekDevelopmentCorp]

Hi Brian - Thank you for watching! This mold box can absolutely be re-used. The great thing about this set-up is that the box can be adjusted depending on the project size (and then secured with the c-clamps). The only thing you need to be aware of is possible cross-contamination of different materials. As an example - if you were to pour tin-cured silicone rubber into the mold box and then come back later and pour a platinum-cured silicone rubber into the same mold box, residual tin compound from the first pour could cause cure inhibition in the platinum-cured silicone rubber.

[@twistedworxengraving7920]

@@PolytekDevelopmentCorp First off... Thank you for not only replying to me, but as quick as you did!! Also, thank you for the heads up.. I actually engrave concrete and I have also been getting into making Firebowls (out of concrete of course).. and I have been interested in making my own pavers (paver molds) etc.. I will look you guys up online.. Thanks again!!!

[@imdadulhaquefaridsmartpbm2533]

এসব পন্য তৈরীর করতে চাই Please help me

[@globelbusiness2242]

Hello a start paver plants

[@kevswick]

How much did this mold end up costing?

[@PolytekDevelopmentCorp]

Thank you for watching. This mold required ~11.2 lb of Poly 75-70 Liquid Rubber. A 16-lb kit of Poly 75-70 currently costs $143.00. This cost doesn't include any other supplies, including release agents, tools, mold box materials, etc.

[@jw8786]

www.semost.com

[@salehahmed5826]

Release agent means what ? silicon oil?.........sealing agent means?

[@MrHydyr]

Release agent is a special "mold form oil" it prevents concrete adhesives from sticking to the mold. BTW, domestic oil etc. won't work. Another possible solution is oil based benzine. Apparently this company has developed their own release agent, which is more practicle in use when it comes to the complex forms.

[@budcline9110]

hydyr han Or, diesel fuel can be used, much less expensive.

[@globelbusiness2242]

This plant information send whatsapp messages [phone]

[@DublinDaniel]

what if I have a stepping stone shaped like a dog paw? I'm not experienced whatsoever either, lol.

[@LarryDickman1]

If you can form the wooden frame, then you can make a Dog Paw mold.

[@josec080411]

👏👏👍😃

[@sanjanaverma7558]

Sir contrac no

[@inofriends1638]

RIP my ears

[@nsbharathi4402]

👍👍👍🙏🙏🙏🙏

[@pintahappy]

No me he enterado de nada Pero bueno Al menos me he entretenido

[@devoncarter9062]

This system is too costly in both materials and time- the mold is unusable during the 6 to 12 hours curing time. I've found that a toggle clamp mould that can be struck after 1.5 to 2.0 hour initial setting time is best because releasing a toggle and a few taps on the frame is all that is necessary to free the framing from the cast paver without damage. Cuts in the paver to fit around the edges of the patio can be made with a spring steel scraper while the cement is still soft and thus enables one to avoidi the dust from diamond sawing when fully cured. Using a 12 x 6 inch tile bases attached to a vibration talbe, the paver can be easilly slid off the table onto a ceramic tile of the same thickness for curing on a stand and another batch of 10 to 20 tiles produced on the vibration table. For making the frame waterproof I've found acrylic polyester filler (bog) is best for pressure seals, subplimented with beeswax if needed.

[@tamielizabethallaway2413]

Much quicker to order a mould from eBay! Way cheaper too! Our mould is twice this size and gives a York stone paving effect....£16 including delivery!

[@fadir101]

Would you please send me the name of the material you had

[@tamielizabethallaway2413]

@@fadir101 just search for concrete moulds, or paving moulds... Ours is 2' x 2' in size. There's all different styles available...

[@johnevans59]

Good instructive vid but muted thump thump background music, it gave me headache

[@anjitkumar5682]

Hayi

[@onefeather2]

I would buy a mold 🙂

[@THEBambiB]

Congratulations! You just spent 2 days and $70 to make a paver.

[@seedubyu]

I know....I thought to myself "all that effort to make ONE mold so if you have ONE mold you can only make ONE slab at a time.... christ thats gonna be a long long process for a fkin patio lol.

[@SmittenKitten.]

@@seedubyu But its stated purpose is not for making an entire patio... It's for duplicating an existing, but damaged, paver with a specific shape. Did you... Did you not watch the video?

[@Dima96092]

lol, why make a matrix? isn't it easier to go to the place where you bought it?

[@1beachdog]

for the time and money could of replaced everyone of those $2 pavers

[@dw2843]

Pavers are not that cheap

[@SmittenKitten.]

Where can I purchase $2 pavers like these?!

[@tsfcancerman]

Or just find granite stones from nature and cut them into slabs

[@tomharvy9374]

way too much work to fake something. make bricks.

[@hatshirts]

$125 dollars in material for a few pavers to match.... eh.. volume yes, research affordable routes for the mold material. but on right track for sure

[@calvingosling1968]

Great way to make concrete molds to take to 3rd world countries as weight is a factor while travailing by air

[@WaterDrinkersUnited]

View 3 replies ^

[@BeLStone]

Формы для тротуарной плитки из силикона/полиуретана ? 🤔😂😂😂 У буржуев жизнь своя...

[@drychalice]

So many thumbs down.... ???? It must be that crappy music.

[@romeliapolly4171]

Woodprix is a good solution for every woodworker.

[@Butterbottom1]

Lose the music!

[@OGChadney]

Just here for the music