High-performance hybrid silicone sealant for precision sealing across sensitive and demanding environments.

The SHARPIE Modified Silicone M Sealant MSC1-01 is a one-component, medium modulus sealant engineered with Advanced Silicone Hybrid Polymer Technology. Formulated specifically for Class 1 Cleanroom applications (ISO3), this sealant offers non-staining, low dirt pickup, and excellent durability across a wide range of construction and industrial applications—including façades, panels, ACMV ducting, concrete, and metal.

SHARPIE MSC1-01 delivers outstanding UV resistance, elasticity, weatherability, and primerless adhesion on most porous and non-porous surfaces. It is ideal for professionals seeking a high-performance, paintable, and low-outgassing sealant that performs under extreme environmental conditions.

Key Features

• Cleanroom-Class 1 Compliant (ISO3) – Low outgassing, ideal for semiconductors, pharma, and wafer fabs.
• Excellent Weather Resistance – Withstands UV, temperature extremes, rain, and snow with negligible change in elasticity.
• Non-Bleed & Non-Staining – Safe for natural stone, marble, granite, and sensitive substrates.
• ±50% Joint Movement Capability – Maintains bond strength even in high-movement joints.
• Paintable – Excellent compatibility with most acrylic, stucco, and water-based paints.
• Durable & Flexible – Elastic recovery of 75%, elongation at break up to 400%.

Ideal Applications

• Cleanrooms (Class 1 & below), Operation Theatres, Wafer Fabs
• Façade sealing (aluminum, metal, tiles, coated panels)
• Cold storage rooms, prefabricated housing, drywall joints
• ACMV ductwork, non-fire-rated wall penetrations
• Weatherproofing of windows, roofs, and exterior panels
• Natural stone sealing without risk of staining

Technical Specifications

• Base: Modified Silicone (Hybrid Polymer)
• Density: 1.39 g/mL
• Tack-Free Time: ~1 hour (23°C, 50% RH)
• Elongation at Break: 400%
• Tensile Strength: 1.10 MPa
• Shore A Hardness: 30
• Service Temperature: -20°C to 90°C
• Fungal Resistance: Pass
• Colors: White, Ivory, Brown, Black, Beige, Gray, Light Gray, Aluminium Gray (custom colors available)

Packaging

• 320 ml plastic cartridges (10 pcs/box)
• 600 ml foil sausages (12 pcs/box)

Limitations

• Not suitable for underwater or continuous water contact applications
• Do not use on wet, frozen, or oil-contaminated surfaces
• Not for structural glazing or food-contact applications
• Oil-based paints are not compatible; water-based paints should be tested for repellency

Certifications & Standards

• ASTM C920: Type S, Grade NS, Class 50
• JIS A 5758 F-20HM
• SGBP (Singapore Green Building Council): Excellent rating