Product Description

The HT S50 Weather-Seal Silicone Sealant is a one-part, high-strength neutral cure, medium modulus silicone that cures upon exposure to atmospheric moisture. It provides excellent adhesion to glass, metal, ceramics, wood, PVC, and aluminium composite panels.
The sealant is non-staining, non-corrosive, low-odor, and offers superior resistance to extreme temperatures, water, and weathering.

Key Benefits of the Weather-Seal Silicone Sealant

• Neutral Cure – Virtually non-corrosive and low-odor compared to acetoxy sealants.
• Weatherproofing – Excellent waterproofing and UV resistance for long-term durability.
• Movement Capability – ±50% joint movement performance (ASTM C719).
• High Elasticity – >500% elongation and strong recovery under thermal changes.
• Non-Staining – Resists dirt pickup and surface streaking.
• Ease of Application – Paste consistency, easy caulking, fast tack-free time (<30 min).

Weather-Seal Silicone Sealant Applications

HT S50 is commonly used to seal and weatherproof joints in façade, curtain wall, and window systems, and to bond and seal joints between glass, metal, ceramics, wood, PVC, and aluminium composite panels in both new construction and renovation projects. Explore our full range of weatherproofing silicone sealants for more options.

Technical Specifications

Packaging

• Cartridges: 300 ml, 25 units per carton.
• Colors: White, Charcoal Grey, Black (customized colours available).
• Storage: Store at 15-27 °C; avoid >50 °C and moisture exposure.
• Shelf Life: 12 months in original unopened packaging.

Frequently Asked Questions

What is HT S50 Weather-Seal Silicone Sealant used for?

It is a one-part, neutral-cure silicone sealant used to seal and weatherproof joints between glass, metal, ceramics, wood, PVC, and aluminium composite panels, offering resistance to extreme temperatures, water, and weathering.

What is the difference between neutral cure and acetoxy cure sealants?

Neutral cure sealants such as HT S50 are virtually non-corrosive and low-odor, making them suitable for a wider range of substrates than acetoxy-cure sealants, which can be more corrosive to certain metals.

How much joint movement can HT S50 accommodate?

HT S50 offers ±50% joint movement capability as tested to ASTM C719, with over 500% elongation and strong recovery under thermal changes.

How fast does HT S50 cure?

HT S50 has a fast tack-free time of under 30 minutes and cures upon exposure to atmospheric moisture.

What colours and packaging sizes are available?

HT S50 is supplied in 300 ml cartridges (25 units per carton) in White, Charcoal Grey, and Black, with customised colours available on request.

How should HT S50 be stored?

Store HT S50 at 15–27°C, away from temperatures above 50°C and moisture exposure, to maintain its 12-month shelf life in original unopened packaging.