Surface Preparation: For best results, 2320/2321 Sealant should be applied to a clean, dry surface which is free of foreign matter. When resealing over old existing sealant, remove sealant before applying 2320/2321 Sealant.
Elongation: 900% Tack Free: 15 minutes Cure: 5 days
Application and Tooling:
2320/2321 Sealant may be applied at any working temperature. When temperature is below 40° F (4° C), application of sealant will be easier if sealant is warmed. Level or remove excess sealant with wet tooling stick or knife.
To seal gutter lap joints, apply bead of sealant along inside edge of all joints and around rivets. When rivets are not used on lap joints, apply adequate sealant between 4” overlap to ensure full contact between both surfaces.
To seal gutter end caps and slip joints, apply liberal amounts of sealant to these surfaces before the use of rivets.
Painting: 2320/2321 Gutter and Narrow Seam Sealant may be painted in 24 hours with latex or most oil-based paints.
Cleaning: Remove 2320/2321Sealant from gun and tools before it cures. This may be done by scraping and use of solvents such as MEK (lacquer thinner),
• Excellent adhesion to many building surfaces, even when damp or oily
• UV resistant
• Cleans up easily
• Asphalt shingle compatible
For sealing aluminum, galvanized and vinyl-clad gutters, end caps, and downspouts. It is also recommended for lap joints, storm windows, metal awnings, vents, flashing, side corner joints, and thresholds when a small joint sealant is required.
Adheres To: Asphalt shingles, brick (masonry), concrete, glass, vinyl, wood, sheet metal, and other common building substrates