WACKER® PA - PREMIUM ACETOXY
WACKER®PA a one-part, acid-curing, high-modulus silicone sealant for glazing and industrial applications.
WACKER® PA cures at room temperature under the action of atmospheric moisture to give a permanently flexible silicone rubber.
• Ready gunnability at low (+5°C) and high (+40°C) temperatures
• Low shrinkage during vulcanization
• Flexible at low (-40°C) and high temperatures (+180°C)
• Rapid crosslinking: quickly becomes tack-free
• Long shelf life
• High modulus
• Excellent tooling characteristics for professional use
• Excellent adhesion with glass，vitrified surfaces，ceramic tiles，many plastics and most paints
• 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.
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.
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.
WACKER® PA is usually supplied in standard size cartridges that fit all standard caulking guns.
The 'Best use before end' date of each batch is shown on the product label.
Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.