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Dowsil 785 Sanitary Silicone Sealant

£6.40Incl. VAT

Dowsil 785 is a premium sanitary silicone sealant formulated to create long-lasting, mould-resistant seals in bathrooms, kitchens, and other high-moisture...

SKU: 3279111/C05

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    Product Details

    • Description

      Dowsil 785 is a premium sanitary silicone sealant formulated to create long-lasting, mould-resistant seals in bathrooms, kitchens, and other high-moisture environments.

      Its acetoxy-cure system provides excellent adhesion to non-porous surfaces such as glass, ceramic tiles, and enamel, forming a durable, watertight barrier that prevents mould and mildew growth.

      The high-gloss, easy-to-clean finish keeps joints looking fresh, while superior elasticity accommodates movement around baths, sinks, and shower trays without cracking or peeling.

      Dowsil 785 is trusted by professionals and homeowners alike for sealing sanitary fixtures, splashbacks, and countertops, combining fast curing, excellent toolability, and long-term performance.

      Whether you’re completing a new installation or refreshing an existing bathroom, it delivers the quality and hygiene protection associated with the Dowsil brand.

       

      Technical Info

      • Type: High Modulus Acetoxy Cure Silicone

      • Cartridge Size: 310 ml

      • Cure System: Acetoxy

      • Movement Capability: ±20 %

      • Skin Time: 10–15 minutes

      • Full Cure: 24 hours (23 °C / 50 % RH)

      • Temperature Resistance: -40 °C to +150 °C

      • Application Temperature: +5 °C to +40 °C

      • Shelf Life: 12 months (unopened)

      • Colours Available: White, Clear, Ivory

       

      Suitable For

      • Bathrooms, kitchens, and sanitary areas

      • Sealing around baths, showers, sinks, and tiles

      • uPVC, glass, ceramic, and enamel surfaces

      • Domestic and trade applications

       

    • Benefits

      • Sanitary-grade acetoxy silicone with advanced mould and mildew resistance
      • Long-lasting, waterproof seal ideal for bathrooms, kitchens, and wet rooms
      • Excellent adhesion to ceramics, glass, and enamel surfaces
      • Smooth, glossy finish that resists staining and cleaning chemicals
      • Fast-curing and easy to tool for a professional finish every time

    • How to Apply

      1. Surface Preparation

      • Non-porous materials (ceramics, glass, enamel): Clean with Dowsil R-40 Universal Cleaner or an equivalent solvent on a lint-free cloth; wipe dry immediately.
      • Porous materials (brick, stone, mortar): Mechanically clean to remove loose material and dust.

      Ensure surfaces are dry, sound, and free of soap residues or grease.

      2. Masking - Apply masking tape to both sides of the joint for a clean edge and to avoid excess spread.

      3. Application - Cut nozzle to desired bead size and apply a continuous bead of Dowsil 785 using a caulking gun. Maintain steady pressure for smooth flow and full joint contact.

      4. Tooling - Tool immediately after application using a spatula or finishing tool to smooth the bead and ensure adhesion. Remove masking tape before skin forms.

      5. Curing

      • Skin-over time: approx. 15 minutes
      • Full cure: ~24 hours for a 2–3 mm bead

      Avoid contact with water, cleaning fluids, or condensation during curing.

      6. Joint Design Tips

      • Maintain a 2 : 1 width-to-depth ratio.
      • Minimum joint width: 6 mm.
      • Use backer rod or bond-breaker tape where necessary to prevent three-sided adhesion.

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