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The Napoleon Hearth W573-0007 is a high-temperature sealant, Mill-pac, that comes in a 10.3oz caulking tube. This sealant is typically used on direct vent flex pipe to seal joints and wall penetrations where high temperatures are a factor. It is rated to 1050°F and remains flexible for a long time to hold its seal through expansion and contraction of metal components. The tube fits a standard caulking gun.
This high-temperature sealant is ideal for sealing joints and wall penetrations in direct vent flex pipe systems, maintaining a flexible seal even with expansion and contraction.
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