Gutter & Seam Sealer™

Bostik Gutter & Seam Sealer is a is a single component sealant that forms a watertight, durable, flexible seal in gutters and narrow seams. All weather application, including through standing water. Can be applied from -40°F to 140°F.
Gutter & Seam Sealer has been developed for building construction and industrial applications. This narrow seam sealant is particularly effective for sealing gutter lap joints, end caps and slip joints. Other sealing applications include: downspout joints, storm windows, flashing, joints in metal awnings, joints in vents and thresholds.