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DOWSIL™ 991 Silicone High Performance Sealant

A medium modulus elastomeric sealant specifically designed for weatherproofing sensitive porous stone and metal panel substrates.

Properties

These values are typical properties and are not intended for use in preparing specifications.

  • Adhesion to Enamelled and Reflective Glass, Fluorocarbon Coated Aluminum, Glass, Granite, Heat Strengthened Glass, Low E Coated Glass, Marble, Metal Panels, Polyester Powder Coated Aluminum/Steel, Stainless Steel, Anodized Aluminum, Limestone, Brickwork, Concrete
  • Color Bronze, Black, Limestone, Grey, Custom
  • Durometer - Shore A 24 Shore A
  • Elongation 800 %
  • Flow/Sag (Slump) < 2.55 mm
  • Modulus @ 150% Elongation, maximum 49.3 psi
  • Movement Capability -50 to 50 %
  • Number of Parts One
  • Resistance Type Ozone Resistance, Thermal Resistance, UV Resistance, Water Resistance
  • Shelf Life 360 Days
  • Specific Gravity @ 25C 1.24
  • Tack-Free Time-50% RH 40 Minutes
  • Tear Strength 34.27 ppi
  • Temperature Range -29 to 50 °C
  • Tensile Strength 246 psi
  • Water Resistant true
  • Working Time 20 Minutes

No Safety Data Sheets are available online for this material
Please Contact Dow for additional information.

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DOWSIL™ 991 Silicone High Performance Sealant
No Technical Data Sheets are available for this product
Please Contact Dow for additional information.

DOWSIL™ 991 Silicone High Performance Sealant


No Regulatory Data Sheets are available for this product


DOWSIL™ 991 Silicone High Performance Sealant
Please Contact Dow for distribution options available for this product.