Dow Corning 991 Silicone Sealants

DOWSIL™ 991 Silicone High Performance Sealant ®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow DOWSIL™ 991 Silicone High Performance Sealant Page 1 of 6 © 2019–2021 The Dow Chemical Company. All rights reserved. Form No. 63-1072-01-0921 S2D Medium-modulus elastomeric sealant designed for weatherproofing sensitive natural stone, glass and metal panels. Features & Benefits  Non-staining on natural stone and reduces residue rundown on metal and glass panels.  Medium modulus, high movement capability – can accommodate ±50% movement in a properly designed joint.  Good unprimed adhesion to a wide variety of building materials such as natural stone, glass, metal, ceramic tile, fluorocarbon paint finishes and anodized aluminum.  Outstanding UV and weathering resistance.  Good working time.  10-year Limited Weatherseal and Non-Staining Warranties are available.  One-part easy to use formulation.  Formulated to prevent staining of porous substrates and reduce streaking on glass and metal panels to improve building aesthetic performance.  Excellent weathering and durability resulting in longer lifecycle and superior long-term weatherproofing.  Excellent unprimed adhesion to most building substrates. Composition  One-part, neutral cure silicone. Applications  DOWSIL™ 991 Silicone High Performance Sealant is specially formulated to prevent staining of porous substrates such as natural stone and minimize streaking on metal panels and glass. It forms a durable, flexible, watertight bond with most building materials and can be used for new and remedial construction applications.