DOWSIL 758
Harmonization Code : 3919.10.80 | Other self-adhesive plastic rolls not exceeding 20 cm wide.
Main features
- 15-Minute Working Time
- +/-25% Joint Movement
- 800% Cured Elongation
Product Description
DOWSIL 758 Silicone Weather Barrier Sealant is a one-part, neutral-cure silicone elastomeric sealant for primerless application to low-surface-energy air and weather barriers, window flashing, and fenestration materials. Documented substrates include polyethylene, polypropylene, other common polyolefins, PVC, steel, aluminum, and fluorinated surfaces. Typical flow/sag is 0.06 mm and volatile organic content is 25 g/L. Typical cured properties include 30 Shore A hardness and 200 psi tensile strength.
Key features
- Working time: Working time is 15 minutes.
- Joint movement capability: Joint movement capability is +/-25%.
- Cured elongation: Typical cured elongation is 800%.
Applications
Weather barriers; self-adhered and nonwoven window flashing; fenestration joints; polyethylene, polypropylene, PVC, steel, aluminum, and fluorinated surfaces.
TDS, SDS & Technical Documents
Technical Specifications
Mechanical Properties
Additional Information
Before-processing sealant properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Working time | 15 | min | |
| Flow/sag | 0.06 | mm | Typical; slump |
| Volatile organic content | 25 | g/L | Typical |
Cured sealant properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Movement capability | +/-25 | % | Stated capability |
| Hardness | 30 | Shore A | Typical |
| Elongation | 800 | % | Typical |
| Tensile strength | 200 | psi | Typical |
