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
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Advanced Mould Resistance: Contains a fungicide that protects against black mould growth for long-term hygiene.
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Neutral-Cure Silicone: Low odour and non-corrosive, safe for use on most building materials.
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Excellent Adhesion: Bonds to glass, ceramics, enamel, glazed tiles, aluminium, and many plastics.
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Durable & Flexible: Accommodates joint movement up to ±20% for lasting performance.
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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
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Form: One-part silicone elastomer
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Skin-Over Time: ~30 minutes at 23°C / 50% RH
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Joint Movement Capability: ±20%
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Application Temperature: +5°C to +40°C
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Service Temperature: -50°C to +150°C
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Shore A Hardness: ~20
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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.