Dowsil 791 is a premium-quality silicone sealant, ideal for both porous and non-porous construction substrates. As one of the most economical options for quality silicone weathering, Dowsil 791 quickly cures to a durable, flexible seal, able to accommodate for significant joint movement.
Features and Benefits
- Ready to use as supplied
- Unaffected by sunlight, ozone, weather
- Joint movement capability
- Low odour
- Fast cure
Directions of use
Before use, remove any old sealant or contaminants from the area being sealed. We would also recommend masking any areas adjacent to the joints to ensure neat sealant lines.
For best results, apply Dowsil 791 in a continuous motion using a light pressure. Once applied, spread the sealant using a backing material to create a smooth joint surface. This should be completed within 15 minutes or before cured skin has formed.
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Dow Corning Q&As
How long does silicone sealant take to dry?
Silicone sealant usually takes at least 24 hours to completely dry. This means, if you’re using silicone sealant in your shower or bath, you must wait at least 24 hours before using the appliance, to ensure you don’t disrupt the curing process.
How to clean silicone sealant?
If your silicone sealant is starting to look mouldy, your best solution is to remove and replace the sealant to completely eradicate the mould. Once your new sealant is applied, we’d recommend regularly cleaning your sealant with an anti-mould cleaner to keep it in prime condition.
Is silicone sealant waterproof?
The majority of silicone sealants are waterproof and will provide a watertight seal to joints. Dow Corning 791 is a fantastic silicone sealant solution, as it’s not only waterproof, but also resistant to mould and mildew.