Dow Corning DowSil 688 Silicone

Product Information

One-part neutral cure silicone sealant designed for a wide range of glazing, weather sealing and professional caulking applications. It will bond to form a strong weatherproof seal on most common building materials.

Features & Benefits

Adheres to a wide range of building materials and finishes
Neutral cure; will not corrode galvanized/zinc-coated steel or attack concrete
Excellent resistance to weathering, ultra-violet radiation, vibration, moisture, ozone, temperature extremes, airborne pollutants, cleaning detergents and many solvents
Long life reliability
Meets International Standards such as CNS 8903, BS 5889, BS EN ISO11600 20LM
Strong elastic seal capable of withstanding movements up to ± 25% of original joint width
Non-slumping; can be used in vertical and overhead joints
Easy to use – one part, no mixing required
Can be applied in any season
Good weatherability – it is virtually unaffected by sunlight, rain, snow, ozone or temperature extremes
Easy to use
Bonds to most common construction materials without use of primer
Excellent recovery from extension and compression
Ease of application – ready to use as supplied

Applications

DOWSIL™ 688 Glazing and Cladding Sealant is a one-part neutral cure silicone sealant
designed for a wide range of glazing, weather sealing and professional caulking
applications. It will bond to form a strong weatherproof seal on most common building
materials.

Specifications

As Supplied – tested at 25°C, 50% relative humidity

Flow, Sag or Slump Nil
Approximate Working Time2
Approximate Working Time2 Minutes 10
Tack Free Time: 30 Minutes
Specific Gravity: 1.4
Durometer Hardness, Shore A: 32
Ultimate Tensile Strength: 1.1MPa
Ultimate Elongation at Break: 400%
Temperature Stability: -20°C to 120°C

Material Data Sheet Material Safety Data Sheet Get A Quote

Building Supplies