DOWSIL™ 995 Silicone Structural Sealant is a one-part neutral-curing silicone sealant designed specifically for structural bonding applications of glass and metal in factory or field situations.
The rate of surface cure and cure-in-depth of most one-part RTV silicone sealants is affected by the temperature and humidity of the environment. However, an environment of high temperatures in combination with high humidity may slow the surface cure rate of DOWSIL™ 995 Silicone Structural Sealant.
Features & Benefits
- Odorless, non-corrosive cure system
- Cures to form an extremely tough elastomeric rubber ensuring a durable, flexible,watertight bond
- Excellent weatherability and high resistance to ultraviolet radiation, heat and humidity,ozone and temperature extremes
- Excellent mechanical properties
- Successfully tested for use in protective glazing applications
- Excellent unprimed adhesion to wide range of substrates including coated, enameled, and reflective glasses; anodized and polyester coated or painted aluminum profiles including most fluoropolymer-based paints such as Kynar
- Meets global standards for structural glazing (American, Chinese, European)
Applications
Silicone structural glazing and protective glazing applications
How to Use
Complete design and installation guidelines are contained in the Dow Americas Technical Manual, Form No. 62-1112. Specific advice is available from your local Dow Sales Application Engineer.
Preparation
Clean all joints and glazing pockets, removing all foreign matter and contaminants such as grease, oil, dust, water, frost, surface dirt, old sealants, or glazing compounds and protective coatings.
Application Method
Install back-up material or joint filler, setting blocks, spacer shims, and tapes. Mask areas adjacent to joints to ensure neat sealant lines. Primer is generally not required on nonporous surfaces, but may be necessary for optimal sealing of certain porous surfaces. A test placement is always recommended.
Apply DOWSIL™ 995 Silicone Structural Sealant in a continuous operation using a positive pressure. (The sealant can be applied using many types of air-operated guns and most types of bulk dispensing equipment.) Before a skin forms (typically within 10 minutes), tool the sealant with light pressure to spread the sealant against the backing material and joint surfaces. Remove masking tape as soon as the bead is tooled.
