Application
• Glass and windows construction
• Sealing of joints between glazing and supporting structure (frame, transoms, mullions)
Restrictions on use
WACKER® PA should not be used on substrates such as marble, concrete, fibrous cement and mortar, as the product releases acetic acid during vulcanization.
WACKER® PA should not be used in contact with metals such as lead, copper, brass or zinc due to corrosion.
WACKER® PA may be discolored in contact with some organic elastomers, e.g. EPDM, APTK and neoprene.
WACKER® PA is not recommended for sealing of aquaria, please use our ELASTOSIL® 121.
WACKER® PA is not recommended for use on natural stone, such as marble, granite, quartzite, as it can cause staining.
WACKER ® PA is not recommended for structural glazing bonding.
Preparation
The substrate areas that will be in contact with the sealant must be clean, dry and free of all loose material, dust, dirt, rust, oil and other contaminants. Non-porous substrates should be cleaned with a solvent and a clean, lint-free, cotton cloth. Wipe dry immediately with another such cloth before the solvent evaporates from the surface.
Adhesion
WACKER® PA exhibits excellent primerless adhesion to most non-porous siliceous material, e.g. glass, tiles, ceramics, enamel, glazed tiles and clinker; impregnated, varnished or painted wood; and some plastics.
Users must carry out their own tests due to the great variety of substances.
The adhesion can be improved in many cases by pretreatment of the substrates with a primer.
If adhesion difficulties arise please contact our technical service.
