Dow -DOWSIL™ 758 Silicone Weather Barrier Sealant

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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.


Category: caulks | construction sealants | elastomeric sealants...

MasterFormat: Joint Protection | Joint Sealants



Dow
Corporate Center
PO Box 994
Midland, MI 48686
Tel: (586) 496-4000

jlmijal@dow.com

https://www.dow.com/en-us.html

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Overview


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
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.


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Specifications

Typical Properties

Adhesion to

Anodized Aluminum, Fluoropolymers, Paint, Vinyl/PVC-U

Appearance

Opaque

Chemistry

Neutral

Color

White

Cure System

1-Part Cure

Cure Type

Neutral Cure

Durometer - Shore A

30 Shore A

Elongation

800 %

Flow/Sag (Slump)

0.06 mm

Movement

Medium

Movement Capability

-25 to 25 %

Number of Parts

One

Primerless Adhesion

Primerless

Resistance Type

UV Resistance

Special Features

Adhesion to Special Plastics

Substrate

Non-porous

Tensile Strength

200 psi

Volatile Organic Content

25 g/liter

Where Used

Job Site

Working Time

15 Minutes