Durability and Storage
When stored in cool, dry conditions below 30°C (86°F) in original, unopened containers, DOWSIL™ 798 Cold Room Silicone Sealant has a shelf life of 12 months from
date of production.
How to use
When designing joints using DOWSIL™ 796 neutral silicone, the minimum joint width should be 6mm. For joints between 6 and 12 mm wide, a sealing depth of 6 mm is required. For joints wider than 12 mm, a width to depth ratio of 2:1 should be used.
Make sure that the surfaces to be sealed are clean, dry, sound and free from dust, release agents and other contaminants that may impair adhesion. All non-porous surfaces should be cleaned and degreased by wiping with a suitable solvent such as DOWSIL™ R-40. porous
surfaces such as concrete, brick and mortar must be mechanically cleaned.
Masking / Protection
Areas adjacent to joints should be masked with tape to prevent contamination of the substrate and ensure a clean line of sealant. Masking tape must be removed immediately after application.
Machining / Finishing
The joint should be machined within 5 minutes of application to ensure good contact between the sealant and the substrate. Sealant treatment also provides a smooth, professional finish.
Excess sealant can be removed in the uncured state using DOWSIL™ R-40 Universal Cleaner. If the sealant is incorrectly applied to porous substrates, it should be left to cure completely and then mechanically removed.
Do not use DOWSIL™ 798 Silicone Sealant on bitumen, natural rubber, chloroprene or EPDM substrates or on building materials and flexible plastics that may bleed oils, plasticizers or solvents.
Special tests must be carried out on sensitive substrates. DOWSIL™ 798 is not recommended for structural glazing or insulating glazing.