MS303 is a single-component, eco-friendly interior sealant based on advanced MS Polymer technology, manufactured using imported environmentally safe raw materials.

Widely used in Japan, Europe and North America, MS303 cures by reacting with moisture in the air and forms a strong, elastic rubber-like bond after curing.
It is non-toxic, solvent-free and safe for indoor use, making it an ideal choice for modern green interior decoration projects.

Key Features & Benefits

• Eco-Friendly & Safe
  Free of toluene, formaldehyde and organic solvents
  Low odor, low VOC, suitable for indoor environments
• Durable & Long-Lasting
  Does not shrink, harden, discolor or fall off over time
  Excellent aging and UV resistance
• Clean & Hygienic
  Mold-resistant and insect-resistant
  Smooth, glossy surface after curing
• High Elasticity & Strong Adhesion
  Maintains flexibility while providing high bonding strength

Applications
MS303 is a high-strength elastic sealant designed for interior decoration, offering excellent adhesion to:

• Aluminum
• Stainless steel
• Plastics
• Stone
• Glass
• Wood

Recommended Uses:

• Bathroom and kitchen joint sealing
• Cabinets, wardrobes and furniture seams
• Interior decorative panel bonding
• Fixing indoor decorative components

Application Guidelines
Ensure surfaces are clean, dry and free of oil or dust before application

• Use temporary fixing support during bonding; remove after 24 hours
• Not suitable for high-temperature environments
• Not recommended for underwater or long-term water immersion
• Optimal application temperature: +15°C to +40°C

In cold conditions, warm the cartridge before use.

Technical Specifications

Item	Specification	Notes
Base Material	MS Polymer
Appearance	Paste
Color	White / Grey / Black	Custom colors available
Density	1.5-1.6 g/cm³	23°C x 50% RH
Tack-Free Time	~20 minutes	23°C x 50% RH
Curing Speed	~3.0 mm (1 day) / >6.0 mm (7 days)
Hardness	Shore A 50-60	GB/T 531.1
Tensile Strength	≥2.5 MPa	ISO 37
Elongation at Break	~200%
Shrinkage	≤1.0%	ISO 10563
Temperature resistance	-40°C to +90°C
Weather Resistance	No cracking, discoloration or hardening after UV aging

Packaging Options

• 300 ml Cartridge
• 600 ml Sausage Pack

Storage & Shelf Life

• Shelf life: 12 months
• Store in a cool, dry place, in original unopened packaging

Safety Notice

• Keep uncured sealant out of reach of children
• In case of eye contact, rinse with clean water for at least 15 minutes and seek medical advice
• Ensure adequate indoor ventilation during use
• Dispose of packaging according to local environmental regulations