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A sill sealer that pairs 3/8-inch closed-cell polyethylene foam with a self-adhesive waterproofing membrane on the bottom. The adhesive side bonds to the uneven top of a foundation wall, and the foam forms a gasket under the sill plate that blocks air, moisture and insects. It comes in two widths, 3.5 inches and 5.5 inches, both in 25-foot rolls. It suits builders and remodelers framing on concrete or block who want a combined capillary break and air seal in one step, rather than plain foam sill seal alone.
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Premium Energy Sill Sealer pairs a full 3/8" closed cell polyethylene foam with a self-adhesive waterproofing membrane. It fills the voids and irregularities between the top of the foundation and the sill plate. Together they form a gasket seal that blocks air, moisture and insect and rodent entry beneath the sill plate.
The adhesive bottom conforms to an uneven foundation wall top and sticks in place for easy, precise placement. It bonds to concrete, block, wood, metal, vinyl, brick and foam surfaces. It can be cut and applied with just a utility knife.
The foam is mildew and water resistant, which helps prevent sill plate rot. It is resilient and does not rot or deteriorate with age. Sealing the joint between the foundation and the sill plate helps reduce heating and cooling loss and keeps carbon monoxide from entering the home from garage sill areas. It can be used in residential and commercial construction, on slab on grade, over crawl spaces and with basements.