Creating a Refractory Mix Out of AirCrete for the Rocket Mass Heater

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[@sunfish55]

I really like these folks. I get to visually experiment without buying a thing. bless the makers!

[@richardsilva-spokane3436]

You are one lucky guy to have a wife who shares your enthusiasm, innovation and creativity ♥️

[@carpenterfamily6198]

I was thinking the same thing !

[@jakefriesenjake]

@@carpenterfamily6198 My wife is the exact opposite.... Except when it's a project for her...

[@do.5330]

Agreed. I almost hate him for that. 😅🤷

[@carolsloanes4938]

I've been trying for years to get my husband interested in my rocket stove project, Doh.

[@HEMIdouglas]

By adding a male lip on one end and female groove on opposite end, units can be assembled or stacked.

[@lokilyesmyth]

If you put aluminum powder into a mix with water glass. The high base environment will produce hydrogen that will foam up and make an aircrete like material. The hydrogen will escape from the material soon after leaving a safe fire proof foam. But your max temp with waterglass will be around 2200F

[@deawilliams8955]

I just watched the story on you two and I am so HAPPY for you. God Bless You!❤

[@rnupnorthbrrrsm6123]

Where did you watch it ?

[@HoneyHollowHomestead]

Totally, ABSOLUTELY, *FASCINATING* !! I swear I could see the wheels turning in your head!

[@christiedecker2724]

I so wish that those who help with low income folk like myself and my husband, we're both disabled but we could manage a wood stove like this, could install something like this in our homes rather than throw money to oil companies, to electric companies...it would be such a blessing!

[@YehovahSaves]

We installed a "regular" wood burning cook stove, and it is a real blessing. It saves on propane and electric expenses, but it is a lot of work. Answersfromgod.com/?youtube=NcVlb-z6Y94

[@cjc9088]

Darwin...You Are A GENIUS! Wow...I'm so impressed! So glad I found you thru Julie. xo

[@spirit-sup3703]

thats soooo amazing!!! Thanks for sharing!!

[@paulofthewoods0787]

Good stuff. I was looking into how I could use aircrete in a rocket mass heater and here it is. Made the foam generator got some decent aircrete now on the the water glass. I was thinking starlite or the glue baking soda cornstarch mix might also be an option.

[@B30pt87]

Wow! You guys are answering questions I hadn't even gotten to yet. Thank you so much for making these videos. (I absolutely subscribed!)

[@ronaldroberts7221]

Thanks for publishing this info! Refractory mixes are not hard to find, but I hadn't considered the weight. I just assumed I'd have to put up with a terribly heavy set-up. Thanksfully, I found this before I was about to start on my own.

[@dirtpatcheaven]

You are welcome!

[@daxtonbrown]

I've been doing something similar before seeing this. Seems to be the right path.

[@terryharris3393]

Into Evans uses pearlite mixed with a small amount slurry of bentonite to make an insulated castable for the riser. Using the waterglass and dry bentonite might just be an improvement.

[@william_bz]

You are the Honey "Can" Do Carpenter! 😁

[@mythoughts1................1]

you've done a great job of convincing me. thank you.

[@rubygray7749]

Brilliant! I need one of those! I need a RMH too.

[@wambutu7679]

Amazing ingenuity!

[@JR-wv2kb]

Darwin brought me here...he's genius and super humble! Aircrete is amazing! Thanks for sharing!

[@jamestarter6590]

Awesome idea

[@patjb4010]

Thank you for sharing!

[@justmefolks1863]

Love the videos, I would put a cleanout in the bench area though. Would be easier than rebuilding if it clogs up. You did a good job on that build, keep up the great work!

[@HEMIdouglas]

Suggestion procedure: You might pre=make sections of aircrete riser with groove on top ide and lip on bottom to interlock. Then take cured unit drop in tank of water glass solution to coat all surfaces. Then coat with Portland cement and stack up sections and finish bonding water glass with fire.. Then determine temperature and cooking time to finished product.

[@jonasedholm331]

Try a vacuum chamber to get the waterglass deep in the aircrete/perlite. Should work. It works with Epoxy resin and cactus Juice in wood.

[@robbierohn123]

Came across your vid & love the the information, experiments. You did & love love it👍

[@milevez2693]

Thanks for free information...great job,..

[@ghz24]

Just for the record the water glass is reacting with carbon dioxide heat just speeds up the reaction. The crust you see is silicon dioxide and sodium carbonate.

[@50shadesofgreen]

awesome info !!

[@clarencehopkins7832]

Excellent stuff bro

[@kennethkustren9381]

Once, I saw a guy turn paper pulp into a fireproof & waterproof casting. Plaster of Paris, & SodiumSilicate,... or Gypsum.

[@juliehenderson1672]

Love you Darwin!!! Genius!

[@jimmylimestone]

The thing is, you won't have to let the fire burn into the night, you can time the burn to end before you want to get to bed, the bench will keep your kids from freezing.

[@HEMIdouglas]

By adding a male lip on one end and female groove other end, units can be stacked for a chimney.

[@SlippinJimmy.]

sodium silicate reacts with the calcium compounds in concrete to form calcium silicate, which has a melting point of 2500+ degrees F.

[@vc1343]

Try adding some graphene to the silicate mix. Expensive but impressive results. Other components work to boost refractory performance as well.

[@Wayneburg]

I'm inspired to make an air/Roman concrete

[@Banjo-lm2wl]

Amazing well done from AQustralia well done.

[@Wayneburg]

This video made me subscribe! Fantastic work!

[@rcornie5476]

Ahaa....he guy.you and family are great...love you all.

[@frankhoffman3566]

The main purpose of a rocket mass heater is to transmit as much heat from the burning into the mass - allowing for that heat to migrate into living space. Theoretically, you want the smoke ultimately leaving the chimney to the outdoors to be cool. Aircrete, perlitecrete and other kinds of air entraining methods will act as an insulator, not as a reservoir for heat - meaning you'll end up losing most of your heat out the chimney. You can buy bags of refractory cement, but the most cost effective method I've used is adding a good shovelful of fire clay to each 80 lb bag of ready mix concrete. Or, if you are laying in stones, you add the fire clay to a similar weight of mortar mix. I've built a pizza oven and I can assure you that thing gets hot. I've had no degrading of any portland cement product I've used.

[@ghz24]

If this is working right it will get way to hot for normal cement. Cement disintegrates at about 1000 F The riser in the stove can reach 1900. Nearly double the 1000 degrees of a pizza oven.

[@frankhoffman3566]

@@ghz24 ... Yes in part. I have a steel angle iron in my brick oven that deformed slightly in the heat. I take this to mean the top of the pizza oven reached close to 1900F. Still, even with that heat, the portland/clay mortar joints between the oven's red clay bricks have not been affected. Disintegration certainly has not happened. By comparison then, for a rocket mass heater, a well designed, heat resistant firebox is necessary, but adding clay to concrete mix for the mass - often benches - will be adequate to sustain the high temperatures

[@shanecardey9743]

If you were to put that glass with the aircrete in a vacuum environment and then alternate between vacuum and refreshing you could probably get the absorption rate way up there

[@BittyBooBrown]

very cool.

[@jjbailey01]

Rocket heaters can easily be made lightweight and portable. Rocket mass heaters, as the name implies, can not. Once you remove the mass from a rocket mass heater, it becomes a simple rocket heater. Conversely, a rocket mass heater is simply a rocket heater with a massive thermal battery attached to it to store excess heat. I didn't write this to put you down. I just want to highlight the differences between rocket heaters and rocket mass heaters. You built an awesome rocket heater. Without the thermal battery, it is not a rocket mass heater. I do like the creativity in using aircrete for the insulated riser. This is an important part of making an efficient rocket heater.

[@homayounshirazi9550]

I am glad your HVAC system is more to your liking. This does not mean that your wood produces more energy than your neighbor's. Your system EXTRACTS more energy from your stove in the manner you have designed it. Your residence is probably better insulated and your comfort level may also be different than others. Some have poor insulation, others might feel that a temperature of 78 degrees is what makes them feel comfortable. You extract more from a chord of wood by heating solid masses than someone else's heating system that utilizes a fireplace for heating their living space. It all has to do with the degree of insulation of the living space and the method of extraction of heat from the fuel(wood) that is burned and COMFORT LEVEL for different people. I noticed you looked comfortable inside your house dressed in your overcoat. Someone else might feel more comfortable being in a t-shirt while indoors. Your comfort level is obviously different. Someone else might prefer more humidity in his indoor space than you do. Insulate your house better and extract heat more efficiently from your fuel within the parameters of your comfort zone.

[@t.h.o.r.]

Hi Julie and Darwin- I watch both your channels avidly. -Im living a similar life down in NZ. Why Im here is to ask If I might pay homage to you two and show some snips of this video? to introduce you and show how im making my reaction chamber insulation for my plastic depolymerisation machine- turning waste plastic into diesel fuel

[@Uticagreens]

Have you given any thought to possibly installing the actual burn chamber of the rocket heater outdoors? The children could be inside while the high heat fire would be outside and away from the small structure. You could route the flu chamber to wind inside of the cabin to produce heat with the threat of a ultra hot fire on the outside.

[@rjaquaponics9266]

I built 6 rocket mass heaters (rebuilt it 6 times) in a dome I had over two winters in Wisconsin. I learned a great deal about them and how they fail. If a riser has a catastrophic failure, it can drop materials into the burn chamber and the active flame comes out the inlet of the RMH. It happened to me and luckily I was sitting here there and I had plenty of water from my aquaponics system to extinguish the flame. I absolutely love RMHer's. I was able to heat my 20' dome that only had two layers of 6mil plastic to 75 degrees each night. As I remember the coldest night was -23 degrees F. And, the most wood I ever used in a night was 3 paper grocery bags of pallet wood. Nothing better than cherry tomatoes in late January in Wisconsin! I miss my dome!

[@brucea550]

“If a riser has a catastrophic failure, it can drop materials into the burn chamber and the active flame comes out the inlet of the RMH. It happened to me and luckily I was sitting here there and I had plenty of water from my aquaponics system to extinguish the flame.” And this is the problem. The idea is awesome. But Paul Wheaton doesn’t seem willing to admit the flaws. You cannot get insurance on your house for this reason. Codes will not allow the RMH for this reason. They are being built by AMATEURS which is fine, but there is no accepted design parameters, no UL testing. It’s an awesome thing, until it isn’t.

[@jdwilsun]

Awesome! Can you give a good refractory recipe? I see none here.

[@priestesslucy3299]

@@brucea550 these things are slowly changing thankfully. There are stoves getting approval that can be run through a mass. The legal one I know right now is like $2500, which is a lot. But if you have an expensive home it's worth it to get insured

[@brucea550]

@@priestesslucy3299 I’m not sure what you mean about stoves that can be run through a mass. The system has to be designed as a system, not a factory woodstove and a home built mass. Could you maybe mention a source for what you know of? I do know there are companies making the actual prefab riser that you can buy for your RMH fabrication, but still not a complete UL system that will satisfy codes or insurance underwriters. I’d LOVE to find one! Paul W. makes ‘I know of a guy’ comments but never any actual facts or sources. Even if you have a non-expensive home, having homeowners insurance provides you with liability protection if, for example, someone gets hurt on your property. It’s not just about ‘if the house catches fire’. All these uninsured folks are living on ‘a wing and a prayer’, and their only protection from potentially getting sued is their own poverty- can’t get blood from a turnip. It’s also highly irresponsible putting these experimental heaters in occupied spaces where people sleep. Please don’t misunderstand, I think experimental stuff is great, and I have now built an RMH in a detached garage, with the firebox separated from the rest of the structure by a concrete wall. So far I like it. But it’s clearly experimental, and I wouldn’t put one in my house.

[@priestesslucy3299]

@@brucea550 Liberator is the one I know that's available and legal now.

[@AerialLensVideo]

Great idea - THANKS! Really, really helpful. By the way, yes the heat blasts off the water but it's the CO2 gas from the combustion process that does the curing of the water glass (from torch combustion, or gas (not electric) oven, or just use dry ice from the local welding supply - you get it). Air curing to glass is pretty slow only because ordinary outdoor air is only about 0.04% CO2. That is, it is not the heat that makes the solution into glass. Most off the shelf water glass solution is about 40% silicate in suspension and the rest is in fact water, so the expansion to the perlite-like appearance is caused by steam escaping from the heated water only. But who cares - the end results are perfect! Thanks again!

[@roach1405]

You might making a product for high temperature boilers for the refractory in the cells but it needs to be strong also

[@mr.m.o.g.o.m.]

You might try colodial cilica slurry to seal the surface. I found that sodium silicate or water glass will crack when I have used it for different foundry brick mixtures. If u try the slurry it is applied, fired at 700 f 90 minutes, and repeat. Watch "Lining the super C forge" post.. Food for thought

[@vc1343]

Post cure is good practice. May I suggest you try graphene in one form or another. It does not take much. Might mix graphene with silicate and post fire/cure that way. Thanks.

[@mr.m.o.g.o.m.]

WHERE CAN I PURCHASE, AND IS THERE A SPECIFIC GRADE OF GRAPHENE WOULD YOU RECOMMEND? ANY INSTRUCTIONS? THX.

[@d.a.t.4699]

have you ever done a pressure test on aircrete like you use to do on the bridge concrete?..i guess what i am getting at is...have you come up with a load bearing mix for building structure walls in homes, etc.?

[@pdan62]

Wheaton's stuff I have seen, you can put links up.

[@VenomsDelight]

You should take advantage of the size of your segments! Use a vacuum chamber and submerge your riser segment for permeation. You'll be able to use a more concentrated mix of sodium silicate and slow cure it. I'd bet that your overall product would be a lot closer to what you want.

[@priestesslucy3299]

Could you elaborate for a dumb blonde trying to understand?

[@VenomsDelight]

@@priestesslucy3299 which part?

[@spirit-sup3703]

This is absolutely awesome!! How you feel about making these water glass aircrete for a mobile oven?

[@terrynicholson5214]

Kilns and pottery wheels are needed, butnat times well most cant afford....i am one so we want to grow our craft and way of using pottery for our needs. Itll keep us busy to fire our grandsons projects easily

[@mfredricknew]

so I love this. I do have one concern.. if you use the water glass and pearlite will it not fill all of the holes when it got hot and this deter the insulating properties?

[@JanColdwater]

I have an idea for this to be modified to make fireplaces more efficient and effective for heat and cooking, especially when power is down. I believe it will work. I haven't seen it done yet. Maybe I can get the chance to draw it and send it to u to have at it since I cannot build it right now. I think you will change the fireplace world! LOL

[@alliea2624]

I have been pondering several ideas myself .. I hope that he can publish your ideas !!

[@michaelglenning5107]

Great real world application of Technology. I going to try it. What did you read about aircrete made with magnesium phosphate cement and fly ash?

[@iPleadTheFith]

You mentioned wanting to get more water glass into the aircrete. Have you tried using the powered form of sodium silicate in the Portland cement before making the aircrete?

[@jarwik]

hemen beğendim. emek var. bilgi var.

[@tonyt.1596]

Have you tried mixing the water glass with the foamcrete? If so what was the results?

[@johnw9141]

not sure if you check the comments mate but it might be useful to try vacuum impregnation similar to how you use a vacuum to get epoxy into fibreglass or carbon fibre.

[@dickburns9200]

You're quite the handyman.

[@michaelglenning5107]

Basalt fibers are best for heat insulating

[@velwheel3135]

Rather than using only Portland cement, use layers, outside Portland with an inner liner of fire clay.

[@kissmya325]

I have a question about the aircreat panels .Just how big can they be made an how thick can they be made ? Are they strong enough for a structural load ? What is the insulation R-value ? I am planning a cabin build here in Alaska an looking at options

[@stevenfox5736]

Do you have a link to the 'water glass'...? What a cool video.!! Thank you for sharing...!

[@aareminer7600]

For harden waterglass you should use just CO2 gas enstead of heat.

[@terrynicholson5214]

Try diluting thenwater glass less, still with water but like 75% liquid glass rest 25% water

[@CivilLizard]

Tried warming up concentrated liquid glass to make it get soaked up a bit more easily instead of diluting it?

[@jdog4534]

You can buy fire brick cement mix. Its about $80 per bag

[@vanderumd11]

Exactly.. 5bags later and materials plus time... might as well buy a 4500 efficent rated stove

[@jdog4534]

@@vanderumd11 but where's the fun in that? ..not to mention, 5 bags for 1 rocket stove? Will you be flying it to the moon? Considering the mix, I was thinking maybe ½ a bag would make a nice sized rocket stove..

[@georgedreisch2662]

Might try fumed silica in place of Portland 2, or bentonite.

[@misterawesome1743]

wow

[@terrynicholson5214]

Ideas for refractory brick for kiln. Fire brick clay i used ill see how it does, but need it weather proof i am disabled and cannot build a structure to cover our propane kiln

[@1100wing]

Looking forward to a final aircrete refractory mix recipe.

[@d.a.t.4699]

so what if you did add some clay...even better?

[@thorthunder3227]

What is needed here is a list of places where a person can buy these ingredients at a low cost.

[@soggieshorts1]

I feel like i am watching a cooking show for guys haha

[@josephdupont]

I I'd like to make say a 12" long road maybe 5 inches in diameter drill a 1" = 1 1/2 " hole.. and coat it in your water glass solution. I want to make a rocket chinmey for an wick oil heater...

[@GoneBattyBats]

I have heard that the Romans used Volcanic Ash as a cement and some of it is as good today as the day they mixed it.

[@dirtpatcheaven]

My husband told me that and I didn't believe him. Had to go look it up, but you are right!

[@GoneBattyBats]

@@dirtpatcheaven We could have roads and driveways that would last forever if we used it today.

[@shaddec55]

Keep wondering what the waterglass is cut with-- is it water? 50/50 mix... with what?

[@raydreamer7566]

Can this mixture be used to repair or replace the fire brick in my work shop Quebec wood stove or does it have too much insulation value for a wood stove ?

[@bbruuse]

-48 a few days ago with more to come, a bit tired of those $250 a month natural gas bills. I've had many wood stoves over the years, many bought and built. The one thing I've learned is burning green wood is when creosote can become a problem. So as long as you don't burn green wood you hopefully won't that problem. ( However in a wood stove, 3 dry logs and 2 green logs makes for a fire that isn't as hot. )

[@dirtpatcheaven]

We burn really dry wood but it is soft wood. We only grow soft wood in our area, pine and douglas fir. We had creosote buildup every six weeks in our conventional wood cook stove. The new rocket stove hasn't had any creosote with the same wood now that we have the aircrete chimney on it for insulation.

[@bbruuse]

@@dirtpatcheaven Have you tried burning pallet wood? I picked up 250 free pallets, many are built with hardwood, these burn very very "HOT" so doesn't take a whole bunch to warm the double garage up. I usually run a skill saw, inside the stringers on each side, of the pallet, then only have the middle nails to deal with. I honestly believe you're mass heater should have been about 1/2 the size, as big as it is, as you live in a tiny house. ( It would also take up less space. "It must get horribly "HOT" up-top/ in the loft, as hot air rises. "Just my thinking" I find the problem with wood burning is it is incredibly hard to control temperatures. There is another style of wood heating system I tried and really liked, however when it went below -10, it couldn't keep the place warm even when burning massive amounts of wood. Check this out; --kzbin.info/www/bejne/rJDMZnagZ7GGi9Fh- - I'm sure you're buddy could rig one of these up for you, the thing literally functions like a natural gas furnace, with a thermostatic heat controlled fan. I built one, just to test, and really really liked it, but because it gets so cold here, it would have burned to much wood, to be efficient.- kzbin.info/www/bejne/aJ69fmpqprWJqK8

[@franklealand1181]

It's a shame that they stopped using the shuttle you could have made cheaper tiles on the bottom for re-entry and probably better. Well done professor honey do carpenter

[@victoryfirst2878]

Do you know if the foaming agent is safe and not hazardous ??? Thanks

[@bryan17293]

Liner for blast furnace

[@wulfclaw4921]

Wow ! Impressive numbers on the heat. Mine only seems to max out at 300°F to 400°F or so.and is not the same mix no perlite or water glass in it...I am sure that must make a big difference running the rocket mass heater. Wulfy

[@priestesslucy3299]

That's all? Aren't you sending a lot of creosote into your system at that temperature?

[@wulfclaw4921]

@@priestesslucy3299 no. Actually it does quite well. Have a new one I built with fire brick and it performs great- still not super hot though, but no spot and it lights up and rockets like a charm!

[@priestesslucy3299]

@@wulfclaw4921 where are you measuring this temperature?

[@wulfclaw4921]

@@priestesslucy3299 the barrel top , sides

[@priestesslucy3299]

@@wulfclaw4921 Ohhhhhh, I thought you were doing the Heat Riser measurements (which I don't know how they take them, but yeah the internal heat riser temps get nuts.) Top of the barrel that sounds about right ^~^

[@en2oh]

interesting stuff folks. The term "Water Glass" is a euphemism and really isn't glass at all - but it is a version of soluble sand ie silicon dioxide. Sodium Silicate is a pretty useful concrete sealant I'll for your links on aircrete to see about your use of foams and stabilizers. You might consider using other metal oxides instead of portland SEE-ment (I couldn't resist :) )

[@bowright8306]

Have you tried mixing undiluted water glass in your slurry instead of the foam?

[@josephdupont]

What about mixing paper pulp with clay and the fire it after it dries.

[@carpenterfamily6198]

I’ve heard some people coat refractory materials with Satanite - which would be the best coating, Water Glass or Satanite ?

[@scottbillups4576]

Julie, How do you like your rocket stove now that its all done?

[@pdionne03901]

Do you have to take meds to help you sleep at night? My mind runs all the time, just as it seems your does, and I have to take meds to help me settle down or I'll go for days without sleep.

[@elizabethmcmurtry2504]

what about a clay flue liner for the burn chamber and riser and aircrete around it

[@sonofagun3193]

Hi Elizabeth Unfortunately Portland cement desintegrates @~ 550 degree C You could saturate the cement based riser with water dilluted waterglas (sodium silicate) When the cement desintegrates and looses it's structural integrety, the waterglas would keep the riser pipe in shape. A clay liner within above mentioned riser pipe is not a bad idea at all. I suggest you to mix the wet clay with perlite or charcoal or saw dust or expanded clay to reduce cracks. Important.. allow enough time for drying and curing.

[@billdevany3303]

you need not heat water glass to harden it. it hardens due to co2 absorption. it hardens with your torch because combustion causes co2 to be created. it will harden on its own with time as it gets it co2 from the air or you can force it in seconds with co2 gas injection from a tank and it will not expand like it does when you head it. I use it for making sand casting cores for molten metal. I'm going to try just perlite wetted lightly with with water glass the rammed in a form and injected with co2.

[@skpchick318]

You absolutely need to get a patent on that! NOW before you talk about it too much. Julie you are a good friend :)

[@mgm2008]

SKPChick 31 YES, I AGREE! HE SHOULD PATENT IT RIGHT AWAY! !!!

[@pdan62]

SKPChick 31 provisional is easy and gives time to make a full patent

[@JanColdwater]

Well, I thank him for thinking in the future and sharing for free. Our world is moving in a new direction, freeing us with technology... you may want to look into blockchain technology, it is the way of the future for contracts of all kind$.

[@jasondewakk71]

they invented a plastic in the eighties that could take an acytiline torch they could have dipped the entire shuttles into they didnt award the contract to the man and ruined his life

[@homayounshirazi9550]

Getting a patent is easy. Showing that your admixture remains stable over time and does not fall apart is a different thing. Building new system might be easy for some. Building something that lasts and does not show material defect with the passage of time is a different thing. As the saying goes in the advertising business: "-Charlie, we don't want a tuna with good taste; we want a tuna that tastes good!"

[@finieclimber]

I'm new to this but have been looking at a bunch of different things in regard to this. "nilamotk" made a video using silglas and portland to make a refractory and he mixed a ratio of glass to portland before adding water and then allowed it to cure over a very low heat I think he said Co2 was required to cure. So if the foam create is really insulative then is the pearlite really necessary? Then if you can drop the pearlite can you mix the silglass and portland then enough water to allow the foam to work then let cure then slowly heat to make this work?

[@rickstav9024]

The piece you burnt in your hand what was it made of... cement and pearlite?

[@chet0958]

You are going through more work than you have to,I am a ticketed refractory bricklayer,and have been relinning lime kilns,power and recovery boilers,furnaces etc for 20 years.all you need is a bag of lightweight castable.ther is no abrasion so a llightweight castable should work no problem and a bag should only cost you 20 30 bucks,we use it by the pallet and b train.

[@FYahooo]

Where can I find this $20 a bag lightweight refractory

[@mrgurka83]

What would be a good cheap mix for a forge? I was told sand and plaster. But that seems to simple and i heard it fails after a couple uses.

[@lancerudy9934]

How much water glass do you add to one pound of perlite?

[@countrygirl8424]

What part airlight to perlight?? do u use?

[@lancerudy9934]

How much water glass do you need 1 pound of perlite?

[@elwood212]

I’m still waiting on an answer back from you guys on yr site. I wrote you a few weeks ago . I’m wanting to buy one of yr foam machines to build our home . This fire proofing info is apt for us since our home is in Qld Australia in a fire zone. I’m wanting to build rolling fire walls on the perimeter of our inner landscape, so get back to me mate. Suzy.🙏🇦🇺 ps. I’m planning on making a rocket stove mass heater and outdoor rocket fire bath as well using yr recipes and methodology.