The Mapei Mapesil Low Modulus Silicone Sealant Grey 310ml is a neutral-cure and solvent-free sealant specifically for application on natural materials such as marble, granite, and quartz. It forms a flexible, long-lasting barrier that resists weathering, movement, and mould. With its non-staining formula and excellent adhesion, this sealant is ideal for both internal and external applications, including façades, stonework, and sanitary joints.

Key Features

• Performs well in weather-exposed and water-treated environments like swimming pools
• Maintains reliable elasticity and joint flexibility even under extreme temperatures
• Provides non-staining sealing on marble, granite, sandstone and quartz
• Provides reliable mould-resistance with BioBlock technology
• Solvent-free, odourless formula is safer and easier to apply
• Certified for façade, glazing and sanitary applications

Technical Information

• Service temperature: -40 to 150°C
• Application temperature: 5–40°C
• Tensile strength: 0.5N per mm²
• Cure rate for 10mm: 7 days
• Skin over time: 15 minutes
• Movement capability: 25%
• Cure rate for 4mm: 1 day
• Modulus: 0.35N per mm²
• Density: 1.02g per cm³
• Coverage: 3.1m
• Volume: 310ml
• Colour: Grey

Application Instructions

1. Ensure all surfaces are clean, dry, and free from dust, oil, grease or old coatings
2. Cut the cartridge tip, screw on the nozzle and trim to the required joint width at a 45° angle
3. Insert the cartridge into an extrusion gun and apply the sealant evenly
4. Tool the sealant before it skins over (approx. 15 minutes) using a dampened tool

Approvals

• ASTM C1248
• EN 15651
• ISO 8339
• EC1 Plus

Product Disclaimer

• Please note that a water-repellent effect may occur at the joint edge. This does not affect the performance of the sealant
• Not suitable for use where mechanical abrasion or intense traffic is expected
• Do not apply on rubber, highly plasticised plastics or bituminous surfaces
• Avoid prolonged immersion without the use of suitable primers
• Not recommended for application in temperatures below 0°C
• Do not use for sealing floors with heavy traffic