DOWSIL™ 791T Weatherproofing Sealant

What is DOWSIL™ 791T Weatherproofing Sealant?

A premium one-part, easy to use, neutral cure silicone sealant with excellent weatherability and flexibility, and an odorless cure. It is low modulus with outstanding primerless adhesion to a wide variety of porous and non-porous substrates.

Uses

DOWSIL™ 791T Weatherproofing Sealant Transparent is specifically formulated for the sealing of expansion joints in curtain walling facades, building facades and other structures; suitable for the sealing of connection joints between floors and walls, stairs, and other building connections

Benefits

Will accommodate up to 50% joint movement
Excellent unprimed adhesion to a wide variety of construction materials such as concrete, stone, masonry, brick, wood, steel, glass, glazed surfaces, painted or varnished wood and ceramics
Ideal sealant for expansion, connection and other movement joints as its low modulus allows high movement but generates relatively low stress at the adhesion interface
Conforms to ISO 11600-F&G 25LM
Compatible with typical PVB foils. Project-specific testing available upon request
Easy, conventional tooling
Excellent resistance to weathering
Good recovery after extension and compression
High resistance to ozone, ultraviolet radiation
Excellent stability through wide temperature range: -50°C to 150°C

Properties

Application Benefits
Application Temperature Range	5 to 40 °C
Movement Capability	> 50 %
Primerless Adhesion	Primerless
Resistance Type	Ozone Resistance, Thermal Resistance, UV Resistance

Product Use and Formulating
Cure System	1-Part Cure
Cure Type	Neutral Cure
Number of Parts	One
Tack-Free Time-50% RH	35 to 50 Minutes
Where Used	Job Site

Typical Properties
Adhesion to	Brickwork, Ceramic, Concrete, Glass, Masonry, Paint, Steel, Stone, Wood
Appearance	Translucent
Chemistry	Neutral
Color	Clear
Durometer - Shore A	20 Shore A
Low Odor	true
Movement	Medium
Specific Gravity @ 25°C	1.03
Substrate	Non-porous

DOWSIL™ 791T Weatherproofing Sealant

What is DOWSIL™ 791T Weatherproofing Sealant?

Uses

Benefits

Properties

Application Benefits

Product Use and Formulating

Typical Properties

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