Lynn Manufacturing Kaowool Ceramic Fiber Insulation, 1/2" Thick 24" x 25", 2400F Fireproof Insulation Blanket, 3015E

This premixed, easy to trowel, fiber reinforced Refractory cement is an ideal high-heat sealant for Masonry joints less than 1/4 inch thick. Use this cement to set, bond, and repair cracked or broken Firebricks in stoves, fireplaces, and furnaces as well as for building fireplace boxes. Passes ASTM E136 and E72.

Ready-to-use pre-mixed cement sticks easily to masonry in your firebox to fill in small gaps
Thick, smooth consistency makes this cement amazing for mortar between firebricks
For interior use only
Residentially certified and heat rated up to 2000°F (1090°C)
Like all other high temperature pre-mixed cements, Refractory Cement requires a heat cure, or the application will dry out and discolor over time
Ready-to-use pre-mixed cement sticks easily to masonry in your firebox to fill in small gaps
Thick, smooth consistency makes this cement amazing for mortar between firebricks
For interior use only
Residentially certified and heat rated up to 2000°F (1090°C)
Like all other high temperature pre-mixed cements, Refractory Cement requires a heat cure, or the application will dry out and discolor over time

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Rutland Refractory Cement 64 Oz - Fiber-Reinforced Pre-Mixed High Temperature Cement for Fireplace, Wood Stove & Fire Brick - Made in USA, Buff, 4 Lbs;