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Kaowool Rigidizer - Standard (store pick-up ONLY during winter months)

** Once Applied, to fully activate the Crystalization Phase - Expose the rigidized wool to a flame for a few minutes.**

This Standard Rigidizer is an economical alternative to Freeze Proof Rigidizer. A popular colloidal silica compound for treating surfaces of ceramic fiber refractory products (Inswool/Kaowool/forge insulation blanket).

CAUTION: Freezing destroys Standard Rigidizer.  It solidifies, permanently. We can only ship 'Standard' Rigidizer in warm weather. Please see our Freeze Proof Rigidizer if you require shipping during winter months.

Why Rigidize?

  • It provides a degree of surface stiffness, resistance to erosion, and protection from compression during coating with castables (if performed).
  • While Rigidizer can't fully withstand metal welding heat, it helps give wool integrity resisting compression which would permanently diminish performance.  
  • The application of performance/protective coatings to your forge liner is simply easier after it is rigidized. (It makes it less like trying to paint cotton balls). 
  • Commonly used prior to coatings like ITC 100HTITC 296A or Kast-O-Lite 30 which aid increasing the efficiency and longevity of your forge.  


ITC is rated to 5000°F, and by reflecting the heat from the surface of the wool, brings a typical 40% increase of forge efficiency, burning less fuel, & shortening heat up time.
ITC also preserves the properties of the Rigidizer and the thermal wool by mitigating the heat transferred from the firebox.

Typical Applications:

  • Surface coating for ceramic fiber blanket and modules exposed to high-velocity gases.
  • Surface treatment for vacuum-formed fiber shapes to increase surface hardness.
  • Increases surface hardness and resistance to erosion.
  • Easily applied by brushing or spraying, a little goes a long way.

Size Options Available:

  • 250 ml bottle - spray top
  • 500 ml bottle - spray top

    Click here for Rigidizer SDS.


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