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Resin

Polyurethane Sealant Construction PU40

One component, room-temperature neutral-curing, low-modulus polyurethane sealant. It offers excellent performance, including safety, environmental friendly, high strength, aging resistance, vibration resistance, and low-temperature durability. I It possesses excellent adhesion to most construction materials, making it suitable for bonding and sealing porous materials like concrete, GRC, stone, and ceramics, as well as metals and glass. Displacement capability: ±20%.

Features & Benefits

Wide Adhesion Range: Offers strong adhesion to most substrates, especially porous materials.
High Durability: Excellent weather resistance and moisture resistance.
Good Elasticity: 20-level displacement capability with high tear resistance.
Coating Compatibility: The surface can be coated with various paints.
Anti-Pollution: Resists sagging and contamination.
Eco-Friendly: Low odor, solvent-free, ultra-low VOC, and free of isocyanates.
Temperature Resistance: Operates within a range of -40°C to +80°C.

Applications

Sealing joints in prefabricated building wall panels.
Indoor decoration sealing and waterproof sealing of floor structure joints.
Bonding and sealing of wood, tiles, glass, concrete, stone, plastic components, etc.
Sealing joints in wind power, ventilation, and refrigeration equipment.
Joint sealing for vehicles such as automobiles and ships.

Standard Compliant

JC/T 881-2013

Typical Properties

No.	Item		Technical Standard	Test Result
1	Flowability \| Sagging/mm		≤3	0
2	Extrudability, mL/min		≥80	≥200
3	Elastic Recovery Rate, %		≥70	≥80
4	Tensile Modulus, MPa	23℃	≤0.4	≤0.4
4	Tensile Modulus, MPa	-20℃	≤0.6	≤0.6
5	Adhesion at Fixed Extension		No damage	No damage
6	Adhesion at Fixed Extension After Immersion		No damage	No damage
7	Adhesion After Heat-Press and Cold-Tensile		No damage	No damage
8	Mass Loss Rate, %		≤5	≤3