Simond Store 5 lbs. Refractory Coating Heat Guard for Ceramic Fiber Insulation in Blacksmithing Forge - 3270°F High Temperature Heat-Guard for Propane Forge, Kiln, Smelting Furnace

I feel like this made my forge twice as efficient. Pieces heat much much faster at lower pressures. Damascus is much more efficient.There are some tricks to making this work on your ceramic wool. Do a fairly saturated coat first and let it dry, just to seal everything up. Next day add a slightly thicker coat. It will last much longer, and apply to ceramic wool much easier. This stuff seems expensive, but it's well worth what it saves you in time and propane.

I bought a product from another company and it was full of rocks. Threw it away and bought this. Mixed up it is very smooth and applied easily. It was plenty to apply 2 separate coats on my 2 burner forge. I am going to buy another 5lbs just to have on hand so I can reapply down the road if any cracks show up. It's pricey, but does a nice job.

It is what is described but not very durable.

My understanding is that this is the same as, or similar to, Satanite. The package itself says to add 50% water by mass, and mix. I did that and ended up with a bowl full of gray water, with particles precipitating down to the bottom of the bowl no matter how much I stirred it. I applied two coats onto some castable parts I made, the second coat seemed to successfully fill all the little pits/voids in the castable, but it was nowhere near the recommended 1.5-2mm thickness. It was pretty much like applying a thin paint.So I went to the internet and saw multiple videos of people mixing Satanite with just enough water to make a "sour cream" texture paste. Tried it with the Simond product and it behaved exactly the same. Once I got that consistency it was easy to smear it on the castable parts by hand.Regardless how it was mixed, it would not adhere AT ALL to dense firebrick. It just sat on the surface, dried out, and then brushed off easily like a layer of talcum powder. So I basically bought a bunch that I can't use.I assume the product will work well wherever it adheres, but only 2 stars because of the inaccurate instructions, and no guidance regarding the surfaces that it will adhere to (and won't).

You can find this stuff for $16.00 dollars online elsewhere. Do not buy way too much for little quantity, I wish I had the patience to look around more cause now my project costed between 380-500 when it should of been less then 160. Do not buy firebricks on Amazon either.

This is a really good product, but you MUST apply rigidizer to the koa wool before you put the product on. The product does not form a hard surface, just more of a "crust". If you bump it, the product crumbles. If I had known this I would have used a rigidizer on the wool.Oh well, learn from your mistakes. Just wish they had told me that before I applied it! Otherwise I would give it a 5 star.

I coated the interior of my propane melting forge with this product. When I fired up the forge a couple of weeks later it literally flaked off. This was a colossal waste of money.

Gray stuff however I’m waiting on the new brick