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Silicone High Performance Sealant

Silicone High Performance Sealant



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  • Improved aesthetic performance – reduces long-term residue rundown on metal panels and reflective glass or staining on porous substrates
  • Good working time and tooling time
  • All-temperature gunnability – from -29 to 50°C (-20 to 122°F), permitting application in all seasons
  • Medium modulus, high movement capability – can accommodate ±50 percent movement in a properly designed joint
  • Unprimed adhesion to most glass, granite, GFRC, and fluoropolymer painted substrates
  • Excellent weatherability – non-reverting silicone durability
  • Compatible with open-cell polyurethane, closed-cell polyethylene and nongassing polyolefin backer rods
  • Available 20-year Limited Weatherseal and Non-Staining warranties

Dow Corning® 991 Silicone High Performance Sealant (422,98 KB)