3M 4000 UV Fast Cure Marine Polyurethane Adhesive – 1/10 Gallon White Cartridge
3M 4000 UV is a one-component marine polyurethane adhesive that combines the waterproof, flexible performance of moisture-cure polyurethane with the fast-cure advantage of UV light acceleration. The UV-assisted cure significantly reduces the time required to achieve handling strength compared to standard moisture-cure-only polyurethane adhesives, enabling faster assembly throughput in production and maintenance environments.
The polyurethane chemistry provides a flexible, tough, waterproof bond and seal that maintains integrity under continuous water exposure, UV weathering, and the mechanical stresses experienced by marine and aerospace exterior assemblies. Its white color is compatible with white fiberglass, painted metal, and other light-colored marine and aerospace substrates, providing an aesthetically appropriate, invisible bond line.
The 1/10 gallon cartridge delivers controlled, consistent adhesive application through a standard cartridge gun for efficient production and maintenance bonding of larger assemblies. The larger cartridge volume reduces change frequency compared to smaller tube formats on sustained bonding operations.
| Attribute | Detail |
|---|---|
| Manufacturer Part Number (MPN) | 7000046623 |
| Brand | 3M |
| Product Name | 3M 4000 UV Fast Cure |
| Color | White |
| Product Type | One-Component UV/Moisture Cure Marine Polyurethane Adhesive |
| Package Size | 1/10 Gallon Cartridge |
| Substrate Compatibility | Fiberglass, Metal, Wood, Plastic |
| Application Method | Cartridge Gun |
| Cure Mechanism | UV Accelerated + Moisture Cure |
| Industry Use | Aerospace, Marine, Industrial, MRO |
Technical Information
3M 4000 UV contains UV photoinitiators incorporated into a moisture-reactive polyurethane prepolymer system. Upon UV light exposure, the photoinitiators initiate rapid surface cure of the adhesive film, providing fast tack-free time and handling strength without waiting for full moisture-cure progression from the surface through the adhesive depth. Moisture cure continues in the bulk adhesive after UV surface cure, completing the full crosslinking over time.
The resulting fully cured polyurethane elastomer provides excellent waterproofing, flexibility, and adhesion to fiberglass, painted metal, and plastic surfaces. Its chemical resistance to salt water, UV radiation, and weathering agents makes it particularly suitable for marine and exterior aerospace applications where prolonged environmental exposure is expected.
The adhesive should be applied to clean, dry surfaces and exposed to UV light within the open time before moisture cure progresses to the point of gellation. Standard sunlight provides some UV acceleration, but UV lamps at the appropriate wavelength provide more consistent and faster cure. Refer to the 3M 4000 UV TDS for UV exposure recommendations and full cure schedule.
Why Choose 3M 4000 UV?
- ✅ UV Fast Cure — Faster handling strength than standard moisture-cure polyurethane
- ✅ Waterproof — Maintains bond integrity under continuous water exposure
- ✅ Flexible PU Cure — Accommodates joint movement and thermal cycling
- ✅ White Color — Matches white fiberglass and painted substrates
- ✅ 1/10 Gallon Cartridge — Economical for sustained production bonding
Applications
3M 4000 UV is used for marine hull bonding, deck hardware installation, aerospace exterior panel sealing, fiberglass bonding, and general waterproof flexible bonding in marine, aerospace, and industrial applications requiring UV-accelerated cure.
Frequently Asked Questions
Q: What makes 3M 4000 UV faster than standard polyurethane adhesives?
A: 3M 4000 UV contains UV photoinitiators that initiate rapid surface cure when exposed to UV light, providing fast tack-free time and handling strength. Standard moisture-cure polyurethanes cure only by moisture diffusion, which is slower.
Q: What is the MPN for 3M 4000 UV 1/10 gallon?
A: MPN is 7000046623.
Q: Is 3M 4000 UV waterproof after cure?
A: Yes. The cured polyurethane film is waterproof and maintains its bond strength and integrity under continuous water exposure, making it suitable for marine and exterior aerospace applications.
Q: What substrates does 3M 4000 UV bond?
A: 3M 4000 UV bonds fiberglass, metal, wood, and plastic substrates. Clean and dry surfaces before application for maximum adhesion.
Q: Is sunlight sufficient to cure 3M 4000 UV?
A: Sunlight provides some UV acceleration. For consistent and faster production cure, a UV lamp at the recommended wavelength is preferred. Refer to the 3M TDS for UV exposure and cure schedule guidance.