DOWSIL™ 791 Weatherproofing Silicone Sealant is a one part, low modulus, neutral curing weatherproofing silicone sealant designed for both commercial and domestic applications. It provides excellent unprimed adhesion to most porous and non-porous surfaces.
Benefits
- Excellent weathering characteristics, including resistance to ozone, UV radiation and temperature extremes
- Joint movement capability +/- 50%
- Conforms to ISO 11600-F&G-25LM and also meets ISO specification 9047 class 50%
- Designed for general glazing, and weather sealing in curtain wall & building facades
Colours
Grey | Brown | Black | Anthracite | Bronze
Buff | Limestone | Stone | Translucent | White
Technical Information
Where to use | Exterior |
Paintable | No |
Sizes | 310 ml, 600ml |
Application method | Sealant Gun and Cartridge |
Application
Surface Preparation
Ensure that surfaces to be sealed are clean, dry, sound and grease-free. Clean non-porous surfaces with DOWSIL™ R-40 Universal Cleaner, and dry thoroughly with a clean, lint-free cloth before application of sealant. Porous substrates such as concrete, brickwork, mortar etc. must be mechanically cleaned of loose particles using a steel brush, sanding disc or any similiar means.
Application Instructions
Apply sealant to the desired area using a sealant gun. Once finished, the joint should be tooled within 5 minutes of application to ensure good adhesion. For an extensive list of application methods, please consult the Technical Data Sheet.
Clean up
Excess sealant may be cleaned off tools and non-porous surfaces whilst in an uncured state using DOWSIL™ R-40 Universal Cleaner. If sealant is misapplied to porous substrates, it should be left until it is just cured and then removed by peeling, cutting or other mechanical means. Care should be taken not to damage plastic or coated surfaces.
