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Kaowool Rigidizer (2300ºF Colloidal Silica Hardener and Rigidizer) - Foundry Service & Supplies, Inc.
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Amazon.com: Rigidizer for Ceramic Fiber Coating, 2300F Rated, Fireproof Insulation Surface Coating for Ceramic Fiber Blanket Boards Wool - 1/2 Gallon Rigidizer : Arts, Crafts & Sewing
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Simwool Rigidizer - Coating for Ceramic Fiber Blanket - 1 Quart : Arts, Crafts & Sewing - Amazon.com
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