DOWSIL 786
Harmonization Code : 3919.10.80 | Other self-adhesive plastic rolls not exceeding 20 cm wide.
Main features
- Mildew-Resistant High-Humidity Sanitary Sealant
- Permanently Flexible Cured Seal
- One-Part Non-Sag Application
Product Description
DOWSIL™ 786 Silicone Sealant is a one-part, ready-to-use, acetoxy-cure silicone rubber sealant for sealing nonporous surfaces in sanitary and plumbing applications. It contains an antimicrobial, and the cured sealant is mildew resistant, permanently flexible, and resistant to staining, spotting, and color changes. The non-sag material adheres to many surfaces, including porcelain, cultured marble, painted areas, and glass, although adhesion and compatibility should be evaluated for each application. It is available in white, translucent white, and clear.
Key features
- Mildew-resistant cured sealant: Contains an antimicrobial and is formulated for sanitary areas exposed to high humidity.
- Permanent flexibility: Remains flexible without shrinking, cracking, crumbling, or drying out.
- Ready-to-use, non-sag application: The one-part sealant can be applied directly from a cartridge and shows no flow, sag, or slump under ASTM C 639.
Applications / Suitable for
- Sealing around shower and tub enclosures
- Sealing around tubs, sinks, urinals, whirlpools, and bathroom fixtures
- Waterproofing rimless sinks
- Ceramic tile grouting
TDS, SDS & Technical Documents
Technical Specifications
Physical Properties
General Properties
Mechanical Properties
Additional Information
As-supplied / before-processing properties
Typical properties of DOWSIL™ 786 Silicone Sealant before cure. These values are not intended for use in preparing specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Color | White, translucent white, clear | — | ASTM C 639 |
| Tack-free time | 20 | minutes | ASTM C 679; 25°C (77°F), 50% RH |
| Tooling time | 5–11 | minutes | Typical value |
| Flow, sag, or slump | Nil | — | ASTM C 639 |
| Extrusion rate | 350 | g/min | ASTM C 603 |
| Volatile organic content | 22 | g/L | ASTM C 603; based on California SCAQMD |
| Shelf life | 900 | days | Dow product-page typical property; store at or below 32°C (90°F) in the original unopened container |
After-processing / final-state properties
Typical properties measured after seven days of cure at 25°C (77°F) and 50% relative humidity. These values are not intended for use in preparing specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Durometer hardness | 25 | Shore A points | ASTM D 2240; cured 7 days at 25°C (77°F), 50% RH |
| Ultimate tensile strength | 325 (2.1) | psi (MPa) | ASTM D 412; cured 7 days at 25°C (77°F), 50% RH |
| Tear strength | 25 (4.4) | ppi (kN/m) | ASTM D 624; cured 7 days at 25°C (77°F), 50% RH |
| Peel strength | 20 (3.5) | pli (kN/m) | ASTM C 794; cured 7 days at 25°C (77°F), 50% RH |
