Durability and Storage
When stored in cool, dry conditions below 30°C (86°F) in original unopened containers, DOWSIL™ 785 Sanitary Acetoxy Silicone has a shelf life of 27 months from the date of manufacture.
How to use
Make sure that the surfaces to be sealed are clean, dry, sound and degreased. Clean non-porous surfaces with DOWSIL™ R-40 Universal Cleaner or methylated spirits and dry thoroughly before applying sealant or wipe with a clean, lint-free cloth.
Areas adjacent to joints must be masked with tape to prevent contamination of substrates and to ensure a neat sealing line. Masking tape should be removed immediately after processing.
No primer is required on most glazed surfaces, including vitreous enamel, ceramics, porcelain, glaze, etc. In the case of acrylic bathtubs, an adhesion test is recommended. Adhesion to plastic and metal surfaces can be improved by using a Dow primer.
Method of application
Apply a layer of sealer. The minimum joint width should be 6 mm. For joints 6-12 mm wide, the sealing depth should be 6 mm.
The joint should be machined within 5 minutes of application to ensure good contact between the sealant and the substrate. The sealant treatment also gives a smooth professional finish.
Once the skin is formed, curing continues inward 3mm from the surface for 24 hours.