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DOWSIL™ 758 Silicone Weather Barrier Sealant

A one part, neutral cure silicone sealant, designed for adhering to low energy surfaces common in sheet or peel and stick weather resistant barriers. Primerless adhesion to LDPE, anodized aluminum, vinyl, powder coated aluminum, Kynar® coated aluminum.

Uses:

Strong adhesion strength to:

  • Self-adhered window flashing and wraps
  • Nonwoven spunbound window flashing and wraps
  • Polyethylene wraps
  • Polyethylene surfaces
  • Polypropylene surfaces
  • Common polyolefins
  • PVC
  • Steel, aluminum and metals
  • Fluorinated surfaces

Benefits:

  • High adhesion strength
  • Long-term silicone durability
  • Low-VOC formulation
  • Single-component, primerless application
  • ±25% movement capability
  • Passes 5,000 hr QUV test

Properties

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

  • Adhesion to Yes No Anodized Aluminum, Fluoropolymers, Paint, Vinyl/PVC-U
  • Appearance Yes No Opaque
  • Chemistry Yes No Neutral
  • Color Yes No White
  • Cure System Yes No 1-Part Cure
  • Cure Type Yes No Neutral Cure
  • Durometer - Shore A Yes No 30 Shore A
  • Elongation Yes No 800 %
  • Flow Yes No NonSag
  • Flow/Sag (Slump) Yes No 0.06 mm
  • Movement Yes No Medium
  • Movement Capability Yes No -25 to 25 %
  • Number of Parts Yes No One
  • Primerless Adhesion Yes No Primerless
  • Resistance Type Yes No UV Resistance
  • Special Features Yes No Adhesion to Special Plastics
  • Substrate Yes No Non-porous
  • Tensile Strength Yes No 200 psi
  • Volatile Organic Content Yes No 25 g/liter
  • Where Used Yes No Job Site
  • Working Time Yes No 15 Minutes
DOWSIL™ 758 Sealant sticks to most demanding substrates without primer

Get primerless adhesion to window flashing and fenestration materials

Innovative DOWSIL™ 758 Silicone Weather Barrier Sealant solves the challenge posed by plastic- and polyolefin-based window flashing and fenestration materials, sticking to the most demanding substrates without need for a primer.

Detail drawing showing DOWSIL™ 758 Sealant placement

New Submittal Generator Tool
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DOWSIL™ 758 Silicone Weather Barrier Sealant
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DOWSIL™ 758 Silicone Weather Barrier Sealant
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