Dow -DOWSIL™ 791 Weatherproofing Sealant

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


Category: UV resistant sealants | caulking compounds | elastomeric sealants...

MasterFormat: Joint Protection | Joint Sealants



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

fixspec@dow.com

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

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Overview


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

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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Specifications

Typical Properties

Adhesion to

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

Opaque

Application Temperature Range

4 to 40 °C

Chemistry

Neutral

Color

Black, Bronze, Camel, Grey, Limestone, Precast White, White

Cure System

1-Part Cure

Durometer - Shore A

25 to 30 Shore A

Flow/Sag (Slump)

0 mm

Movement

Medium

Movement Capability

-50 to 50 %

Primerless Adhesion

Primerless

Room Temperature Cure - Days

7 to 14 Days

Service Temperature High

150 °C

Service Temperature Low

-50 °C

Specific Gravity @ 25°C

1.51

Substrate

Non-porous

Tack-Free Time-50% RH

45 Minutes

Tensile Adhesion (T/A)

120 psi

Volatile Organic Content

45 g/liter

Where Used

Job Site

Working Time

20 Minutes