DOWSIL™ 790 Silicone Building Sealant is a one-part, neutral-cure ultra-low-modulus silicone sealant for sensitive natural stone, porous stone, masonry, concrete and façade joints. The product is plasticizer-free, low-staining and suitable for porous construction substrates.
The sealant is used for joints between natural stone, curtain wall and mullion joints, expansion and control joints, precast concrete panel joints and other construction joints. DOWSIL™ 790 provides high movement capability, excellent unprimed adhesion to masonry, concrete and natural stone, as well as long-term resistance to sunlight, rain, snow and temperature extremes.
TECHNICAL DATA
- Product type: one-part neutral-cure silicone sealant
- Skin-over time: approx. 9 min
- Tack-free time: approx. 31 min
- Cure rate: approx. 2.8 mm / 24 h; approx. 5.8 mm / 72 h
- Hardness: Shore A 11
- Modulus at 100 % elongation: 0.08 MPa
- Elongation at break: 840 %
- Elastic recovery: 78 %
- Joint movement capability according to ASTM: +100 / –50 %
- Joint movement capability according to ISO: ±25 %
STANDARDS AND CLASSIFICATION
- Conforms to ISO 11600F-25LM
- EN 15651 – CE marking
- ASTM C920: Type S, Grade NS, Class 100/50, Use T, NT, M, G, A and O
STORAGE
- Shelf life: 12 months from date of manufacture
- Store at or below 32 °C in original unopened containers
PACKAGING
- Colours: black and grey
- Packaging available upon request / according to supply batch
LIMITATIONS AND SAFETY
The product is not intended for structural applications, continuously immersed joints, interior penetration firestop sealing systems or surfaces that will be painted after sealant application. Do not use on materials that may bleed oils, plasticizers or solvents, on wet or frost-laden surfaces, or in totally confined spaces.
Do not use on copper, brass or similar corrosion-sensitive metals. This product is not intended for medical or pharmaceutical use. Before use, consult the safety data sheet and the manufacturer’s technical documentation.
📄 Technical documentation
Download the product TDS / PDF for detailed technical information.
📩 Inquiry
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