Wacker ELASTOSIL® RT 480 + T40 – Spreadable Condensation Silicone for Spatula Moulds & FIPG Seals

Premium Spreadable Condensation-Cure Silicone for Professional Mould-Making and Sealing Applications

Wacker ELASTOSIL® RT 480 is a high-quality, spreadable two-component condensation-cure (tin-cure) silicone with a hardness of Shore A 55, specially developed for making spatula-applied moulds on vertical and inclined surfaces and for formed-in-place gaskets (FIPG). This professional product combines a high viscosity (250,000 mPa·s) for spatula application with excellent mechanical strength (4.5 N/mm² tensile strength) and a flexible cure speed through the choice of catalyst.

Key Benefits

• Spreadable on vertical surfaces: the high viscosity (250,000 mPa·s) prevents sagging on inclined and vertical surfaces, ideal for spatula-applied and brush-on moulds
• Flexible cure speed: choose between catalyst T 37 (120 min pot life, 9 hours demoulding time) or T 40 (20 min pot life, 3 hours demoulding time) for optimum production efficiency
• High mechanical strength: 4.5 N/mm² tensile strength and >7 N/mm tear strength for durable, long-lasting moulds
• Shore A 55 hardness: flexible yet rigid, for dimensionally stable moulds that retain their geometry with complex castings
• Minimal shrinkage: 0.25% (with T 40) to 0.5% (with T 37) for dimensionally accurate reproductions
• Wacker quality: reliable condensation-cure silicone from the world leader in silicone technology

Typical Applications

• Spatula-applied and brush-on moulds for ornaments, statues and architectural elements on vertical surfaces
• FIPG (formed-in-place gaskets): seals formed in situ for industrial components
• Moulds for art casting, statues and decorative objects
• Model making and prototyping where dimensionally stable, stiffer moulds are required
• O-rings and seals for technical applications
• Horse hooves and veterinary impressions

Processing Instructions:

1. Weigh out Part A and Part B accurately in the correct mix ratio
2. Mix both components together until the colour is uniform
3. Apply to the model with a spatula or brush
4. Work within the pot life and do not demould until fully cured

Please note – humidity dependence: pot life and demoulding time depend heavily on the amount of Part B and on the relative humidity. Higher humidity shortens both the working time and the demoulding time.

Not suitable for: food-safe applications (for these, use our food-safe silicones) and skin contact/SFX (for these, use our SFX silicones).

Wacker Chemie is a world leader in silicone technology for professional mould making, industrial sealing and technical applications, with more than 100 years of expertise.

Professional Support

Our technical specialists can advise you on catalyst selection, processing techniques, support shell construction and achieving optimum results for your specific spatula-applied mould or FIPG application. Contact us for technical data sheets, processing guidelines or advice on condensation-cure silicones.