MS3937 is a one-component, moisture-curing modified silane adhesive and sealant designed for high-performance elastic bonding applications. After curing, it forms a durable elastomer with excellent mechanical strength and long-term flexibility.

Curing speed and skin formation time are influenced by ambient temperature, humidity and application thickness. Higher temperature and humidity accelerate curing, while lower conditions may slow the process.

MS3937 is free of solvents, isocyanates and silicone resins, and features extremely low VOC emissions during curing. It offers outstanding resistance to UV aging, making it suitable for both interior and exterior applications. The cured surface is paintable and compatible with most paints and coatings.

Key Features & Benefits

• One-component, moisture curing, easy application
• Elastic bonding performance after full cure
• Excellent UV and weather resistance
• Solvent-free, isocyanate-free, low VOC formulation
• High tensile and shear strength
• Paintable after skin formation
• Suitable for a wide range of substrates

Typical Applications

• Bonding of vehicle and RV side panels, roofs, and interior components
• Structural bonding for vehicle bodies, train carriages, containers
• Bonding of general metal constructions
• Applications in electronics, plastics, HVAC and ventilation systems

Physical Properties

• Base Material: Modified Silane
• Appearance: Thixotropic paste
• Density: ~1.4 g/cm³ (23°C)
• Sag Resistance: Non-sag (GB/T 13477.6)
• Odor: Odorless

Curing Properties (23°C, 50% RH)

• Skin Formation Time: ~10 minutes
• Curling Speed: ~3 mm / 24 h

Mechanical Properties

• Shore A Hardness: ~70 (ISO 868)
• Tensile Strength: 3.3 MPa
• 100% Modulus: 2.5 MPa (ISO 37)
• Elongation at Break: 220%
• Shear Strength: 3.0 MPa (ISO 4587)

Environmental Resistance

• UV Aging Resistance: No visible change
• (300W UV lamp, 25 cm distance, 6 weeks)

Application Conditions

• Application Temperature: 5°C to 35°C
• Service Temperature: -50°C to +120°C

Usage Instructions

• Ensure bonding surfaces are clean, dry, and free of oil or grease before application.
• Rusted metal substrates (aluminum, copper, steel, iron) must be pre-treated and derusted.
• Oily or oil-bleeding substrates require surface pretreatment prior to bonding.
• Curing speed depends on temperature and humidity; low conditions may slow curing.
• If viscosity increases, gentle heating can improve extrusion.
• Due to substrate diversity, pre-application testing is recommended.
• Painting or coating can be applied after skin formation.

Packaging

• 290 ml cartridge
• 600 ml aluminum foil sausage
• 180 L drum

Storage & Shelf Life

• Shelf Life: 12 months in original unopened packaging
• Storage Temperature: 10°C – 25°C
• Store in a cool, dry place to maximize shelf life
• Refer to MSDS and local regulations for storage and transportation