Weatherproof silicone sealant 310ml — Dowsil 784 Weather Sealant

Weatherproof silicone sealant 310ml Dowsil 784 is engineered for demanding glazing, construction and industrial sealing applications where long‑term durability, environmental resistance and consistent performance are essential. This weatherproof silicone sealant 310ml incorporates a built‑in fungicide that actively resists mould and mildew formation, making it particularly suitable for areas exposed to moisture, humidity and temperature fluctuations. The formulation provides excellent elasticity and a high‑gloss finish, ensuring both functional and aesthetic performance across a wide range of substrates. As a 100% silicone product, this weatherproof silicone sealant 310ml withstands extreme temperatures, UV radiation and ozone exposure without degrading, cracking or losing adhesion over time.

To support installers and specifiers, the product offers several practical advantages:

• Fast tack‑free time of approximately one hour
• ±25% joint movement capability
• High resistance to UV, ozone and temperature cycling
• Smooth, high‑gloss finish suitable for visible joints
• Built‑in fungicide for mould‑prone environments

Dowsil 784 cures quickly, enabling efficient installation workflows and reduced downtime on site. It conforms to ISO 11600‑G‑20LM, ensuring compliance with recognised industry standards for low‑modulus glazing sealants. While highly versatile, it is not recommended for use on porous external frame materials due to compatibility limitations. Overall, this sealant delivers a reliable, long‑lasting solution for professional installers seeking performance, resilience and ease of application.

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