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DOWSIL™ 791 Weatherproofing Sealant

A one-part, medium-modulus, elastomeric sealant designed for general weathersealing. It is a silicone formulation that cures to a flexible and curable silicone rubber building joint seal.

Uses:

  • General glazing and weather sealing in curtain wall and building facades

Benefits:

  • Ease of application – ready to use as supplied
  • Excellent rheology, low string upon gunning
  • Excellent weatherability, virtually unaffected by sunlight, rain, snow, ozone
  • Neutral cure
  • Low odor

Properties

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

  • Adhesion to Yes No Alodine Aluminum, Aluminum, Anodized Aluminum, Brickwork, Concrete, Enamelled and Reflective Glass, Extruded Mill Finish, Fluorocarbon Coated Aluminum, Glass, Granite, Heat Strengthened Glass, Light-Weight Stone Panels, Limestone, Low E Coated Glass, Marble, Masonry, Metal, Metal Panels, Paint, Plastic, Polyester Powder Coated Aluminum/Steel, Silicone, Stainless Steel, Steel, Stone, Vinyl/PVC-U, Wood
  • Appearance Yes No Opaque
  • Application Temperature Range Yes No 4 to 40 °C
  • Chemistry Yes No Neutral
  • Color Yes No Black, Bronze, Custom, Dark Grey, Grey, Limestone, Metal Grey, Precast White, White
  • Cure System Yes No 1-Part Cure
  • Durometer - Shore A Yes No 25 to 30 Shore A
  • Flow Yes No NonSag
  • Flow/Sag (Slump) Yes No 0 mm
  • Movement Yes No Medium
  • Movement Capability Yes No -50 to 50 %
  • Primerless Adhesion Yes No Primerless
  • Room Temperature Cure - Days Yes No 7 to 14 Days
  • Service Temperature High Yes No 150 °C
  • Service Temperature Low Yes No -50 °C
  • Specific Gravity @ 25°C Yes No 1.51
  • Substrate Yes No Non-porous
  • Tack-Free Time-50% RH Yes No 45 Minutes
  • Tensile Adhesion (T/A) Yes No 120 psi
  • Volatile Organic Content Yes No 45 g/liter
  • Where Used Yes No Job Site
  • Working Time Yes No 20 Minutes
Solid weatherproofing performance at outstanding value

Solid weatherproofing performance plus outstanding silicone sealant value

One of the most economical options for quality silicone weathersealing, DOWSIL™ 791 Silicone Weatherproofing Sealant is a neutral-cure, one-part sealant that quickly cures to a durable, flexible seal that can accommodate significant joint movement. Especially suited for perimeter sealing around doors and windows, it's also excellent for sealing expansion and control joints, precast concrete panels, curtainwall and mullion joints, and internal seals and end dams.

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DOWSIL™ 791 Weatherproofing Sealant
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DOWSIL™ 791 Weatherproofing Sealant


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DOWSIL™ 791 Weatherproofing Sealant
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