Gecko Multi-purpose Silicone Sealant - 300ml Clear

The GECKO S300T Neutral Cure Silicone Sealant is a premium single-component, polysiloxane-based sealant designed for durability and versatility in building and construction applications. Unlike acid-based alternatives, this neutral cure formula will not corrode zinc or zinc/aluminium galvanised steel, making it safe and reliable for roofing and exterior use.

Engineered to be sag-resistant, UV-resistant, and fully weatherproof, GECKO S300T provides long-lasting sealing performance in harsh Australian conditions. Whether used on flashings, gutters, or general construction joints, it delivers excellent adhesion, flexibility, and outstanding durability.

Features:

• Neutral cure (non-acid) polysiloxane-based silicone
• Weatherproof and UV resistant for outdoor performance
• Safe for zinc and galvanised steel – will not corrode
• Sag-resistant for vertical and overhead applications
• Excellent physical properties for long-term durability
• Ready to use, single-component sealant

Typical Uses:

• Sealing roof flashings
• Sealing lap joints in gutters, downpipes, and sheet metal components
• Sealing flashings to chimneys and flues
• Around roof ventilators, skylights, and penetrations
• General plumbing and exterior applications