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Rigidizer for ceramic fiber can be brushed on refractory fiber materials or high temperature insulation surfaces.

Coverage: Pint should cover approximately 6.26 square feet. $12.00 per pint.  Gallon should cover approximately 50 square feet.

Application: It can be brushed on straight from the package.

Shipping will be calculated on your entire order of materials.

Contact me PM for your order.

SAFETY: Wear eye protection, a mask, and gloves when handling this product.  Ceramic Wool Insulation, Safety Alert

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Rigidizer both stiffens the ceramic wool refractory and contains the fibers so they don't break free and drift in your air. The ceramic wool refractory is a breathing hazard and can do permanent lung damage.  Ceramic Wool Insulation, Safety Alert

Add a drop of food coloring so you can see the rigidizer and ensure coverage.

Per Frosty:  It’s is critical that you butter the wool by spritzing it with water prior to applying the rigidizer.  Do this for both layers. The rigidizer should run between layers and bond them together somewhat after the second firing.



This has been identified as a critical step in all processes of forge lining.  It is Frosty’s mantra.

If you don't wet the surface before spraying the rigidizer it will dry on contacting the dry material. Capillary action can ONLY happen if it's wet enough to flow.”

“Interestingly enough the colloidal silica rigidizer is denser than water so as it flows through capillarity it will push the water ahead of it by displacement. It doesn't do this forever but it does allow the rigidizer to penetrate farther.”

“Buttering a hard surface is even more important as the rigidizer, mortar, etc. will NOT penetrate a hard surface it flash dries on the surface unless it's way too wet a mix. You want the rigidizer to penetrate the surface so it bonds properly.”

“Buttering is an IMPORTANT part of the process of getting stuff like a hard refractory flame face to bond solidly to a refractory blanket insulating liner. Getting the blanket to bond to the shell. and getting the kiln wash to bond to the flame face.” It ensures a good bond none the less”  Buttering ceramic wool or fire brick is to prevent it from sucking the water out of the kiln wash on contact. If that happens it will form a dry layer on the surface and the wash can't stick properly and will flake off when you fire it.

Buttering allows the rigidizer to wick along the ceramic wool's fibers and cement them together where they touch. Rigidizer doesn't seal the blanket it penetrates and becomes stiff. Rigidizer dries, it doesn't hydrate but buttering with water allows deeper penetration and more uniform distribution.

Just wet and spritz the layers when you install the second one, if it feels wet to your touch it's wet enough. WASH you hands soonest! It's not toxic but it can be an irritant.

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On 4/12/2019 at 6:27 PM, Glenn said:


So my understanding is that if I am using perlite and water glass and an insulating layer instead of ceramic fiber I still need to spritz the water glass perlite layer, with water,  before I install the KOL30 layer to make sure that the KOL30 layer bonds to the Perlite layer, correct? 

I am very hesitant to use anything harmful to your lungs as I just lost one of my best friends because he inhaled some harmful substances not even realizing it. His demise was not a pretty thing. 

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Click on my name, look for the link that says message.  It will then indicate a message is waiting for me by a number in the envelope icon on my screen next to my name.

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