| Description: This is a 1-part, RTV (Room Temperature Vulcanizing) silicone adhesive sealant. It is one in a range of Acetoxy cure products which are solvent free. During cure, it liberates a very small amount of acetic acid, giving rise to the familiar ‘vinegar’ odour, which quickly dissipates after cure. It exhibits good primer-less adhesion to many substrates including but not limited to; aluminium, nonferrous metals, steel, glass, enamelled surfaces, fabrics ceramics, thermosetting, thermoplastics and wood and cures rapidly at room temperature when in contact with atmospheric moisture. This product is not to be recommended for use with galvanized metals, ferrous metals, copper and its associated alloys or in electronic assemblies. Key Features - Good resistance to chemicals (detergents)
- Good resistance to further tearing
- Excellent elongation
- High transparency
Key Applications: - Complies with Oekotex 100
- Tin free
- Solvent free
Application: Processing / Fixation ALPATEC 645 is ready for use and can be pumped directly from the original container without prior mixing. ALPATEC 645 vulcanises under the influence of air humidity. Fixation begins with skin formation on the surface and develops to the inside. At 23 °C and 50 % rel. air humidity, ALPATEC 645 forms a nonsticky surface within 9 to 20 min. Within 24 hours a layer with approx. 2 mm has totally vulcanised. Low temperatures and low air humidity delay the curing process whereas higher values accelerate it. Thicker silicone layers need longer curing times. A layer thickness of > 5 mm should be avoided. Adhesion of the silicone is achieved by the mechanical anchorage in the substrate. Therefore it is important to have a sufficiently good penetration of the silicone into the substrate.Cured Product: Standard climate DIN 50 014 - 23/50-2. Vulcanizate tested after 14 days Information provided by CHT Group |
