Surface Preparation: Ensure that surfaces to be sealed are clean, dry, sound and free from grease, dust and other contaminants which could impair adhesion. Surfaces can be cleaned and degreased by wiping with a suitable solvent such as DOWSIL™ R-40 Universal Cleaner on a clean oil and lint-free cloth before application of sealant. Check to ensure that the mirror has been evenly coated, is protected by lacquer and is free of scratches.

Note: When using any solvent, always provide adequate ventilation. Avoid heat, sparks and open flames. Use solvent resistant gloves. Observe and follow all precautions listed on solvent container label.

Priming

For specific advice, please refer to our Primers' Guide or contact our customer care.

Sealant Application

The sealant is ready to use. Apply 10 mm wide strips vertically on the back of the mirror in 100 mm intervals. Then press the mirror onto the surface, preserving a constant bead thickness of 2 mm for optimum cure and mechanical grab. Support the mirror for a minimum of 24 hours using adhesive tapes. This will ensure good contact and a minimum of displacement. Air should be allowed to circulate freely around the edges of the mirror thereby allowing the sealant to cure.

Clean-up

Excess sealant may be cleaned off tools and non-porous surfaces whilst in an uncured state using DOWSIL™ R-40 Universal Cleaner. If sealant is misapplied to porous substrates, it should be left until just cured, and then removed by peeling, cutting or other mechanical means. Care should be taken not to damage plastic or coated surfaces.

• In below-grade applications
• On surfaces that are continuously immersed in water
• On bituminous substrates, substrates based on natural rubber, choloroprene or EPDM
• On building materials that bleed oils, plasticizers or solvents, green or partially vulcanized rubber gaskets or tapes
• On frost-laden or wet surfaces
• When used with safety mirrors (single pane mirrors laminated with a plastic film at the back to prevent shattering of the glass when broken), first check adherence of DOWSIL™ 817

Mirror Adhesive on the plastic film.

• In totally confined joints (the sealant requires atmospheric moisture for cure)
• If the sealant is intended to be painted (paints do not typically adhere to most silicone sealants)
• To surfaces in direct contact with food or other food-grade applications
• This product is neither tested nor represented as suitable for medical or pharmaceutical uses.