DOWSIL™ 758 Silicone Weather Barrier Sealant

What is DOWSIL™ 758 Silicone Weather Barrier Sealant?

A one part, neutral cure silicone elastomeric sealant, designed for primerless adhesion to challenging, low surface energy, air & weather barriers, window flashings and other fenestration materials.

Uses

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 to challenging material
Long-term silicone durability
Low-VOC formulation
Single-component, primerless application
±25% movement capability
Passes 5,000 hr QUV test

DOWSIL™ 758 Silicone Weather Barrier Sealant

Unparalleled unprimed adhesion to window flashing and fenestration materials.

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Properties

Application Benefits
Movement Capability	-25 to 25 %
Primerless Adhesion	Primerless
Resistance Type	UV Resistance
Special Features	Adhesion to Special Plastics

Product Use and Formulating
Cure System	1-Part Cure
Cure Type	Neutral Cure
Number of Parts	One
Where Used	Job Site
Working Time	15 Minutes

Typical Properties
Adhesion to	Anodized Aluminum, Fluoropolymers, Paint, Vinyl/PVC-U
Appearance	Opaque
Chemistry	Neutral
Color	White
Durometer - Shore A	30 Shore A
Elongation	800 %
Flow/Sag (Slump)	0.06 mm
Movement	Medium
Substrate	Non-porous
Tensile Strength	200 psi
Volatile Organic Content	25 g/liter