Mastic silicone Fischer 512213 gris

Fischer 512213 Grey is a neutral-cure silicone sealant formulated for sealing and bonding a wide range of common building materials. Supplied in a 310 ml cartridge, this grey silicone adheres to ceramic, concrete, glass, metal, PVC and treated wood. It cures to form a flexible, weather-resistant bead with an open (working) time of approximately 15 minutes and an operating temperature range from -40 °C to 150 °C, allowing use in both cold and hot environments.

Advantages

This silicone sealant offers long-lasting elasticity and weather resistance without becoming brittle or staining adjacent surfaces. Its neutral cure reduces the risk of corrosion on metal substrates and is suitable for use near sensitive materials such as glass and painted surfaces. The 310 ml volume fits standard caulking guns and provides consistent extrusion for controlled application. Thermal resistance from -40 °C to 150 °C makes it appropriate for temperature-variable installations.

Suitable for (tasks / use cases)

• Sealing expansion and connection joints in bathrooms and kitchens
• Sealing glazing joints and window frames
• Bonding and sealing around metal and PVC fittings
• Minor repairs in concrete and ceramic surfaces
• Forms of weatherproofing around facades and exterior trim

Key specifications

• Colour: Grey
• Volume: 310 ml
• Curing system: Neutral cure (silicone)
• Open/working time: approx. 15 minutes
• Service temperature range: -40 °C to 150 °C
• Suitable substrates: ceramic, concrete, glass, metal, PVC, wood

How to use

Ensure surfaces are clean, dry and free from dust, grease and loose particles. Cut the cartridge tip to the desired bead size and puncture the inner seal, then place the cartridge into a standard caulking gun. Apply a continuous bead of silicone along the joint, maintaining steady pressure for even extrusion. Tool the bead within the open time to achieve a smooth finish and good contact with both surfaces. Allow the sealant to cure undisturbed; full cure time depends on bead size and environmental conditions.

Recommendations

For best results, use at ambient temperatures above 5 °C and avoid applying in heavy rain or on frost-covered surfaces. When sealing non-porous surfaces such as glass or painted metal, test adhesion in a small inconspicuous area if uncertain. Clean excess uncured silicone with a suitable solvent; once cured, removal requires mechanical methods. Store cartridges upright in a cool, dry place away from direct sunlight.