SCS2900

COMPOSITION AND MATERIALS

UltraPruf® II SCS2900 series weatherproofing sealant is a one component, neutral cure, low modulus product which is designed for use on all types of substrates commonly used in perimeter seals, curtainwall joints and glazing applications. Formulated from proven silicone polymers, the sealant provides long lasting, elastomeric adhesive beads which are resistant to attack by the elements such as rain, snow, sunlight, ozone and atmospheric pollutants.

UltraPruf® II SCS2900 series weatherproofing sealant is easy to gun and apply at temperatures ranging from −35°F (−37°C) to 140°F (60°C) allowing the sealant to be used in any climate as long as the substrates are clean, dry, and frost free. After cure, UltraPruf® II SCS2900 series weatherproofing sealant has a ±50% joint movement capability in properly designed and installed joints.

UltraPruf® II SCS2900 series weatherproofing sealant cures on exposure to moisture in the air. The temperature performance after cure is from −55°F (−48°C) to +200°F (93°C).

PACKAGING

UltraPruf® II SCS2900 series weatherproofing sealant is available in 10.1 fl. oz. (.299 ml) plastic cartridges packaged in cartons of 24 cartridges, 2 gallon pails, and 20.0 fl. oz. “sausages”. The units are designed for convenience in shipping and are easily handled by warehouse workers and mechanics on scaffolds and staging.

COLORS 

UltraPruf® II SCS2900 series weatherproofing sealant is available in the following six colors:

SCS2902 White

SCS2903 Black

SCS2904 Limestone

SCS2909 Aluminum Gray

SCS2920 Precast White

SCS2997 Bronze

BASIC USES

UltraPruf® II SCS2900 series weatherproofing sealant is intended for use for perimeter seals around windows, curtain wall joints and other weatherseal applications between metals, masonry, concrete, glass, paints and plastic substrates (see Table 2). UltraPruf® II SCS2900 series weatherproofing sealant adheres to most common building substrates usually without priming. The low modulus property allows use in joints subject to ±50% movement. This characteristic is maintained over a wide temperature range after full cure.

LIMITATIONS

UltraPruf® II SCS2900 series sealant is not recommended for: horizontal joints exposed to foot or vehicular traffic or in horizontal joints where prolonged water immersion occurs.

UltraPruf® II SCS2900 series weatherproofing sealant should not be applied on:

• Concrete surfaces which contain residual form oil or other bond breaking contaminants that may interfere with sealant adhesion.
• Building materials which might bleed oil or solvents these include, but are not limited to, impregnated wood and certain vulcanized rubber gaskets or foams, tapes or failed sealants and caulking compounds.
• Areas where atmospheric contaminants might change the appearance of light colored sealants. Silicone sealant is weather−resistant and resists chalking, degradation and erosion. As a result, environmental contaminants tend to cling to the sealant and the sealant surface may take on the color of the contaminant. Darker colors should be used to minimize this effect.
• Reflecting, high−gloss or light−colored surfaces where aesthetics are critical, until adequate on−site sealant, surface and ambient atmospheric tests simulating building design are conducted to upon by the seller and the purchaser as a result of testing for stain or discoloration.
• Totally confined spaces, as the sealant requires atmospheric moisture for completion of cure and generation of properties.
• Surfaces which will be painted, as painting over rubber is not recommended. The paint film does not stretch with the extension of rubber and the adhesion of the paint to the sealant is not adequate.
• Surfaces with special or protective coatings, such as mirrors, or to surfaces such as Teflon® , polypropylene or polyethylene without the approval of the manufacturer of the article, plastic or material.
• Unprepared or wet surfaces. Do not use water for tooling and do not apply to wet or damp surfaces.
• Surfaces where adhesion has not been verified by on−site testing under actual use conditions.
• Structural glazing applications as the adhesive bead.
• Applications where FDA or USDA compliance is required.

Contact GE Silicones Quality Assurance for certification details of Federal Specifications.