25 lb. Pail of Dry-Mix Refractory Cement, High-Temperature Castable Refractory Mortar for Masonry Repair

Has been holding up perty good in foundry/forge.. currently have one small crack, but after several 2000+ degree firings, I’d say that’s perty good.. but it’s just like working with concrete, so vertical layering is perty difficult unless ur pouring around a form.. so brush coating the sides with it is very difficult.

I have used this product to line my forge muliple times and I gotta say it is incredibly durable and holds up to forge welding temperatures extremely well. I use a forced air propane forge and it gets up to welding temp pretty much every time I turn it on. Ive had to reline my forage maybe once a year using this product and all I have to do is just add more to the outside layer and it's good to go for another at least 6 months highly recommended. It holds up to borax flux very well also. Yes its thick and has aggregate.

Exactly what I needed. I used this to line the inside of a forge. A lot of people are commenting that its full of rocks and they can't get a smooth finish. Yes it is full of aggregate (small rocks). That's what makes this product a concrete. Concrete is cement mixed with aggregate. If you want a smooth finish it will take a little bit more work and some knowledge of how to finish concrete. You must "float" the mix after pouring it into your form or casting bed. This procedure is basically using something like a piece of 2x4 or other flat material that you can hold onto while spreading the mix into a flat surface (you can buy a float pretty cheap at any hardware store). After it is nice and flat, YOU ARE NOT DONE! Next you must wait for the mix to stiffen a bit before using a trowel (again, you can find trowels at a hardware store) to finish the surface. This will push any aggregate down into the mix leaving you with a nice smooth surface. This process is incredibly difficult, but not impossible, on a curved or rounded surface (for those of you using this product to make sculptures). It works very well for flat surfaces. I have yet to fire my forge so I can not speak to how well it holds up to heat, but my guess is it will do just fine. So, in short, if you are looking for a product that is very strong and thick this is a great product that does require some knowledge of concrete placement and finishing. If you are looking to cover a surface with a thin layer of refractory or just want a product that will self level and cure to a smooth surface, look at something like a self leveling grout that is fire rated. Hope this helps anyone looking for high heat refractory material.

The media could not be loaded. We used this to mix into some cement and sand mix to make slabs for our DIY brick stove and oven..We used the rest with mortar mix and sand to make mortar to go between the fire bricks.We cured it for a week, only lighting small fires inside and then started doing bigger fires to cook with and heat the porch of our off grid tiny house. So far no cracks!!I'd buy this again in a heartbeat for our next project, a refractory cement rocket stove made from a 5 gallon bucket!

This might be good for casting a lentel, but for laying firebrick, it just doesn't work. It doesn't ever become a mud consistency no matter how much water you add. I started with less water than the directions call for but it is just too gravely (if that's a word). I ended up pouring it into a plastic planting pot and will see how strong it would be for a lentel once it has dried. Will not buy again!

Home made furnace

Sifted out the larger stones quicky with a cheap strainer. Lined my tiny forge. Small metal furnace. Added stones back to make two fire bricks for forge ends. Easy to mix and holds on to the sides and top well. I ordered more cause never know what else I might want to cast.

The stuff has exceeded all of my expectations. I made a forge out of it and 14 firings in it's still the same as when I cast it. Now this is no substitute for kaowool because it acts as more of a heat sink than insulation. Anyone looking for cheap fire bricks should buy this and make their own.