Dow Corning 785+ Sanitary Sealant

Mould-Resistant Silicone Sealant for Hygienic Sanitary Applications

Dow Corning 785+ is a one-part, neutral-cure silicone sealant developed for sanitary applications where long-lasting mould resistance and strong adhesion are essential. Enhanced with powerful fungicide, it provides durable sealing in high-humidity environments such as bathrooms, kitchens, and shower areas. It bonds well to glass, ceramics, porcelain, enamel, glazed tiles, and many plastics without the need for a primer in most cases.

Key Features & Benefits

• Advanced Mould Resistance: Contains a fungicide that protects against black mould growth for long-term hygiene.
• Neutral-Cure Silicone: Low odour and non-corrosive, safe for use on most building materials.
• Excellent Adhesion: Bonds to glass, ceramics, enamel, glazed tiles, aluminium, and many plastics.
• Durable & Flexible: Accommodates joint movement up to ±20% for lasting performance.
• Water & UV Resistant: Ideal for constantly wet areas and exposure to sunlight.

Application Areas

• Sealing around baths, showers, and sinks
• Kitchen worktops and splashbacks
• Sanitary joints between tiles
• General hygienic sealing in food prep areas

Technical Specifications

• Form: One-part silicone elastomer
• Skin-Over Time: ~30 minutes at 23°C / 50% RH
• Joint Movement Capability: ±20%
• Application Temperature: +5°C to +40°C
• Service Temperature: -50°C to +150°C
• Shore A Hardness: ~20
• Colours: White, clear, and other sanitary shades

Installation Tips

• Ensure surfaces are clean, dry, and free from dust, grease, and old sealant.
• Apply a continuous bead and tool within skin-over time for best finish and adhesion.
• Not suitable for use on bitumen, natural stone, or substrates that bleed oils or solvents.