remember guys at the 3 minute mark on this video. he adds a topical layer... that alone will create the heat barrier. but a reinforced water mix will help the structure for heat. This cast is very weak, non baring and will crack under duress. My advice is to cast your project and protect the cast from external elements, like water and pressure. Think eggshell wrapped in cotton and bricked in... otherwise its a go..and a win for the fire community... believe me the info here alone is worth a zillion in building fireplaces...
@@oozification yes if it's done with cast method with the water glass and and such but remember it will take the heat but will be brittle after first heat. Do no knocks 😎
Forgive my english. Does such a brick have good insulating properties in addition to fire resistance? Is it suitable for building an electric kiln? I mean, won't the walls get too hot?
It has excellent insulating properties and I'm sure it will handle the heat well. I'll currently waiting for the arrival of fire clay that I want to incorporate into the mix. The current mix is a bit brittle and I hope the fire clay with mitigate that and also rise the working temperature. I'll be uploading the video of how it works out once its tested.
Thank you so much. Firebricks is too expensive. I'm actually laughing at myself at how ridiculous the ingredients are. Water glass or sodium silicate are what in our locality called ash water...used in noodle making and dye fixing. Basically can be bought everywhere at the food store. How liberating can knowledge be. Just a quick question. If I pour them into formwork for a furnace or kiln, is it ok to use chicken net or shredded steel wool as reinforcement?
That actually sounds like a great idea to add the chicken wire or steel wool for reinforcement! I might try that out and show a comparison of with and without.
@@PenMeister-tq3lm Ash water is Potassium hydroxide, also called lye, but not chemically the same as Sodium hydroxide. Sometimes it is really important to actually use the chemical names.
Hey! Thank you for the video! I have a question about this method. The finising touches with the waterglass, water mixture, is it a plus material, or the ratio contains it? Thanks in advance! :)
Good enough brick for the casting of bronze. For crucible steel, I would just use an old-school blast furnace made from clay which looks kinda like a termite nest. That would mean that I prefer charcoal for casting steel, yes.
I like your process. By seeing your forge I have some safety concerns for you. The fire blanket needs to be encapsulated with a liquid rigidizer so that you protect your lungs. Very dangerous to breath in the fibers.
@@SizzlingIngot Want to keep you healthy for some more awesome videos. :-) May be able to find smaller quantities elsewhere. Currently living in France and paid 75 euros for 5 liters from the only supplier in France. Stay safe and best regards.
Would this work well for lining a paint can furnace for aluminum melting? It won’t be used often so longevity isn’t a concern. More of a proof of concept for fun thing. And I’ve seen a similar slurry made that they cured in the oven. Is this possible with this mixture?
I have a question , I want to build a masonry cookstove that needs insulating fire bricks on the inside. Will this brick work, will it be insulating enough ?
I don't know if casting silicon will be easier than casting glass. Glassy silicate things are always blown and not casted. Obsidian has lots of silicon and no one could cast it into decorations or swords.
Hi. I made this mix but the surface flakes when heated. Bits of perlite I think. Can I paint more sodium silicate again onto the surface a couple of weeks after being cast?
Much better is if you can find ball clay or fireclay or kaolin clay. Mix with sodium silicate only 10% is needed, you can add graphite if you want excellant thermal conductivity.
@@AS-ug2vq I mixed red clay with sand and sodium silicate and lined a steel barrel with the wet mix to make a wood fired tandoor.... Excellent results!! I did not test other methods so I cannot compare
Im gathering matl for my project oven..i already bought plaster of paris..in your recipe you used wht cement..can i sub the POP instead of wht cement? Thanks
Perlite is widely used as insulation as well and usually much cheaper compared to perlite for horticultural use. Just take care that it's not coated/impregnated, may cause problems.
Literally white cement. Most Portland cement is a gray color like you're used to. However for artisan concrete applications there is a white concrete which allows coloring. Chemically there's really no difference between your typical white or gray. I believe they just used white, to match the typical white color of fire bricks.
@@tablesandtorches762 yes I was also wondering about using white vs standard grey cement. From what I have read it would make no difference other than look & feel.
So I landed here because I'm researching ways and materials to make a pizza oven. Question: Do you think this is a good mix for that purpose? How insulating do you think this material would be?
I'm in the process of making one now. I'm using perlite 4x + dry cement 1x + clay 1x + H2O 1x for the interior of the oven. Then a layer of rockwool or ceramic wool for increased heat retention and insulation and finally an outer layer of cement and sand for the exterior.
Just have to focus on the safety factor since the pizza will be lying directly on your brick mixture, there will be dust from the bricks that could end up in the food, are your brick ingredients food safe out do you add something over your home made bricks to make them safe???
I don’t have the chemical make up of each to compare blends but I would assume they both would perform almost identically . It was more of an esthetic thing for me
paolo zannetti that is sodium silicate (water glass). When heated it turns to a clear glass-like material, and makes a sealant for concrete and acts as a glue inside the mix! It also draws water from the mix but keeps it trapped to help speed the portland cure.
@@SizzlingIngot You are at risk here. You must coat kaowool with protective layer. You are at HIGH risk for caner here. This is foolish. Do not purchase from scAmazon and make sure to coat your wool.
How does this hold up if it gets wet? I am casting an outdoor rocket stove and this looks like it should do well for me, but the last mix I tried crumbled when the snow started to melt on it.
you would need to cover it after you finish building it with a water resistant material. You should be good with regular cement (just make sure it's water resistant after it dries out)
The White cement used here is NOT refractory cement. Its simply white Portland that has no more heat resistance than grey. True refractory cement powder is a mix consisting predominantly of hydraulic calcium aluminates. Although both use limestone in the process its in very differnt forms.
Where u get sodium silicate at for water glass still trying to figure out recipe no luck. And how much I pay 4 K wool. Subscribe at nasty melts. Thk u nice furnace.
the recipe i use for sodium silicate for a few years is 200 gm caustic soda 300 gm silica gel with 500 ml of distilled water it makes a very thick sticky brew i then dilute it with distilled water for different applications
