Rectorseal 66613 Metacaulk 350i, 5 Gallon PailsRectorseal 66613 Metacaulk 350i is a 1 component, general purpose fire rated sealant smoke seal for construction joints around penetrations in fire rated walls floors. Prevents flames smoke hot gases water spreading through joint openings through penetrations. Features Highly intumescent and Water Based, non sag caulking grade sealant easy to apply or retrofit, and Paintable Excellent freeze thaw, Flexible Set and Cures to an elastomeric seal suited
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