DOWSIL™ 991 Silicone High Performance Sealant
Uses:
- Specially formulated to prevent staining of porous substrates such as natural stone and minimize streaking on metal panels and glass.
- Forms a durable, flexible, watertight bond with most building materials and can be used for new and remedial construction applications.
Benefits:
- Non-staining on natural stone and reduces residue rundown on metal and glass panels
- Medium modulus, high movement capability - can accommodate ± 50% movement in a properly designed joint
- Good unprimed adhesion to a wide variety of building materials such as natural stone, glass, metal, ceramic tile, fluorocarbon paint finishes and anodized aluminum
- Outstanding UV and weathering resistance
- Good working time
- 10-year Limited Weatherseal and Non-Staining Warranties are available
- One-part easy to use formulation
- Formulated to prevent staining of porous substrates and reduce streaking on glass and metal panels to improve building aesthetic performance
- Excellent weathering and durability resulting in longer lifecycle and superior long-term weatherproofing
- Excellent unprimed adhesion to most building substrates
Properties
These values are not intended for use in preparing specifications.
Typical Properties
- Adhesion to Yes No Anodized Aluminum, Brickwork, Concrete, Enamelled and Reflective Glass, Fluorocarbon Coated Aluminum, Glass, Granite, Heat Strengthened Glass, Limestone, Low E Coated Glass, Marble, Metal Panels, Polyester Powder Coated Aluminum/Steel, Stainless Steel
- Appearance Yes No Opaque, Translucent
- Chemistry Yes No Neutral
- Color Yes No Black, Bronze, Custom, Grey, Limestone
- Cure System Yes No 1-Part Cure
- Durometer - Shore A Yes No 24 Shore A
- Elongation Yes No 800 %
- Flow Yes No NonSag
- Flow/Sag (Slump) Yes No < 2.55 mm
- Modulus @ 150% Elongation, maximum Yes No 49.3 psi
- Movement Yes No Medium
- Movement Capability Yes No -50 to 50 %
- Number of Parts Yes No One
- Resistance Type Yes No Ozone Resistance, Thermal Resistance, UV Resistance, Water Resistance
- Shelf Life Yes No 360 Days
- Special Features Yes No Non Stain Sealant
- Specific Gravity @ 25°C Yes No 1.24
- Substrate Yes No Non-porous, Porous
- Tack-Free Time-50% RH Yes No 40 Minutes
- Tear Strength Yes No 34.27 ppi
- Temperature Range Yes No -29 to 50 °C
- Tensile Strength Yes No 246 psi
- Water Resistant Yes No true
- Where Used Yes No Factory, Job Site
- Working Time Yes No 20 Minutes
No Safety Data Sheets are available online for this material Please Contact Dow for additional information.
No Safety Data Sheets are available online for this material
Please Contact Dow for additional information.
No Food Contact Letters are available online for this material Please Contact Dow for additional information.
No Food Contact Letters are available online for this material
Please Contact Dow for additional information.
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