Osi Gs121 gutter and seam sealant is composed of high quality resins and polymers which cures to form a tough, rubbery seal.
This seal expands and contracts with the change of weather and temperature without cracking.
Formulated especially for sealing aluminum, galvanized and vinyl clad gutters and downspouts.
- Permanently flexible, water resistant seal
- Seals most common gutter and downspout materials
- Expands and contracts with temperature changes
- Cures to a tough rubbery gasket