Würth
Würth PU Marine Adhesive Sealant
Würth PU Marine Adhesive Sealant
Key Features
- Versatile one-component polyurethane adhesive and sealant designed specifically for marine and caravan applications.
- Flame-retardant formula with excellent adhesion to a wide range of materials.
- Permanently elastic, compensating for different material expansions while damping vibrations and noise.
- Extended skin formation time allows bonding of large components and repositioning of joint parts.
- Can be sanded and painted over after curing (paint compatibility should be tested).
- Strong resistance to chemicals, ageing, and weathering - effective against water, salt water, diluted acids/alkalis, and short-term exposure to oils and fuels.
- Low odour, silicone-free, VOC-free, and resistant to UV.
- Certified with EC type examination approval for bonding in shipbuilding and boat building.
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Description
Marine-Grade Performance
Würth PU Marine Adhesive Sealant is a specialised polyurethane-based adhesive and sealant developed for demanding applications in boat building, shipbuilding, and caravan construction. Its flame-retardant formulation provides an additional level of safety, while the broad adhesive range ensures strong bonding to a wide variety of materials commonly used in marine and construction industries.
Elasticity and Vibration Dampening
Thanks to its high elasticity, the adhesive compensates for material expansions and prevents stress cracks in joints. This property also helps to dampen vibrations and reduce noise, making it particularly valuable for marine environments where movement and impact loads are common.
Workability and Flexibility
With a slow skin formation time, Würth PU Marine allows sufficient working time to bond and position larger components before curing begins. Once cured, it can be mechanically processed - sanded, smoothed, or painted over (with restrictions). Please note that overly thick or hard paint layers may impair elasticity and lead to cracking.
Long-Term Resistance and Reliability
This adhesive provides lasting resistance to water, salt water, diluted acids, and alkalis, making it ideal for harsh marine conditions. It also resists short-term exposure to fuels, mineral oils, and both vegetable and animal fats/oils, while maintaining UV stability to ensure durability in outdoor use.
Certified for Marine Applications
Backed by an EC type examination certificate, the PU Marine Adhesive Sealant is officially approved for use in professional ship and boat construction, ensuring reliability and safety in compliance with marine standards.
Note:
- Not suitable for deck caulking (wooden plank sealing).
- Avoid contact with alkyd-resin paint systems.
Technical Information
Specifications
Contents: 310 ml
Container: Cartridge
Chemical Basis: Moisture-curing 1K polyurethane
Colour: Black
Density (20°C): 1.15 g/cm³
Full Curing Speed (23°C, 50% RH): 3 mm/day
Processing Temperature Range: +5°C to +35°C
Temperature Resistance (long-term): -40°C to +80°C
Combined Tension & Shear Resistance: 1.4 N/mm²
Short-Term Resistance: Mineral oils, fuels, vegetable oils, animal oils, general oils
Shelf Life: 12 months (stored max. 25°C)
VOC-Free: Yes
UV Resistance: Yes
Silicone-Free: Yes
Documents
Application Instructions
- Surfaces must be clean, dry, and free from grease.
- Refer to the technical data sheet for pre-treatment guidelines where necessary.
- Cut off the thread cap, attach the nozzle, and trim to the required bead width.
- Apply with a suitable cartridge gun.
- Smooth the adhesive during the skin formation phase to achieve a clean finish.
- Once cured, the product can be sanded or painted. Always test paint compatibility beforehand.
- Avoid thick, rigid paint layers that may reduce flexibility.
Usage Notes:
- Do not use for deck caulking applications.
- Avoid contact with alkyd-resin paint systems.
- Store below 25°C to preserve shelf life.