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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
- Self-leveling; no tooling is required
- Expands and contracts with temperature changes