OSI® GS-121 VOC Gutter & Seam Sealant
OSI Products / OSI® GS-121 VOC Gutter & Seam Sealant
OSI® GS-121 VOC Gutter & Seam Sealant OSI® GS-125 VOC Gutter & Seam Sealant is composed of SBR rubber and high quality resins, which cure to form a tough rubbery seal that expands and contracts with the change of weather without cracking. It is formulated especially for sealing aluminum, galvanized and vinyl clad gutters and downspouts.
- Low VOC formulation meets stringent State and Federal VOC requirements
- Cures to form a tough, rubbery, waterproof seal
- Withstands moderate expansion and contraction
- Permanently flexible, will not crack or split
- Will not become brittle even after years of exposure to freezing and thawing
- Water resistant
- 10.2 fl oz (302ml) cartridge
- Aluminum
- White
Mineral spirits or paint thinner
Related Products
Recommended for
OSI® GS-121 VOC Gutter & Seam Sealant is recommended for sealing around aluminum, galvanized & vinyl clad gutters, downspouts & other metal seams. It is excellent for sheet metal work, ducts and ventilator joints. It works great in sealing seams, joints and cracks in gutter troughs.
Not Recommended for
- Joints deeper than 3/8" (9.5mm) without the use of backing material
- Bonding, polystyrene foam and polypropylene or polyethylene plastics
- Applications as an expansion joint control sealant
- Use indoors without proper ventilation to the outdoors during application and cure
- Use on copper



