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Non-asbestos. Spreads easily, boNDS and seals metal-to-metal and metal to masonry joints under 1/8 in. Durable as firebrick when heat cured. Resists temperatures up to 1093c (2000f). Use when installing or resetting furnaces or oil burners. Prevents air and gas leaks in flue and chimney joints. Can be used on cast iron, steel or firebrick.
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