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Use Everflex PU-240 for: Durable, flexible sealing and bonding in construction, marine, and industrial applications.
Everflex PU-240 is a high-modulus, high-strength polyurethane sealant designed for professional trade use. Its robust formulation provides a tough, durable, and pick-resistant seal with excellent mechanical and abrasion resistance. Ideal for structural bonding of various construction materials, this versatile sealant accommodates constant movement and vibration, ensuring a long-lasting, waterproof seal. Suitable for both internal and external applications, Everflex PU-240 offers exceptional adhesion to common building materials, including masonry, metals, and timber.
Key Features of Everflex PU-240
- High Strength and Durability: Provides a robust, long-lasting seal for demanding applications, ensuring structural integrity.
- Flexible Structural Bond: Accommodates movement and vibration, preventing cracks and failures in dynamic environments, such as pavement joints and vehicular manufacturing.
- Excellent Adhesion: Bonds strongly to most common building materials, including powder-coated surfaces, ensuring a reliable seal in diverse applications.
- Paintable and Sandable: Allows for seamless integration with surrounding finishes, providing aesthetic flexibility for various projects.
- Weather and Chemical Resistance: Maintains performance in harsh conditions, including exposure to UV, water, and diluted chemicals, ideal for external and industrial use.
- Fast Curing: Increases efficiency on job sites, allowing for quicker project completion and reduced downtime.
Technical Overview
Everflex PU-240 is a single-component, moisture-curing polyurethane sealant that provides a high Shore A hardness of 35, indicating its toughness and durability. This sealant offers excellent green strength and tear resistance, ensuring a reliable bond from the initial application. Its ability to cure at a rate of 4mm per 24 hours at 23°C and 65% RH allows for efficient project timelines.
Chemical Properties: Polyurethane-based sealant with excellent resistance to water, detergent solutions, diluted acids, and alkalis, making it suitable for a wide range of applications.
Application Temperature Range: 5°C to 35°C (41°F to 95°F), allowing for use in various climatic conditions. Avoid application in temperatures exceeding these limits to ensure proper curing and adhesion.
Application Information
- Required Tools: Caulking gun, spatula, masking tape, Xylene (for cleaning).
- Trade-Specific Tips: Ensure surfaces are clean and dry before application. Use a backing rod for deep joints. Apply sealant in a continuous bead for optimal adhesion.
- Common Issues and Solutions: Bubbling can occur if the substrate is damp or if air is trapped during application. Ensure proper surface preparation and apply sealant firmly.
Storage and Shelf Life
- Storage Requirements: Store in a cool, dry place between 10°C and 35°C (50°F and 95°F).
- Shelf Life Information: 12 months in original packaging.
- Temperature Considerations: Avoid storing in extreme temperatures to prevent premature curing or degradation.
Certifications
- Meets "green star" environmental criteria due to low VOC content.
Frequently Asked Questions About Everflex PU-240
Q: Can Everflex PU-240 be used in marine applications?
A: Yes, Everflex PU-240 is suitable for marine applications, including re-caulking teak floors and seam sealing. Its ability to cure underwater and resist chemical exposure makes it ideal for marine environments.
Q: What surfaces can Everflex PU-240 adhere to?
A: This sealant adheres to a wide range of surfaces, including masonry, metals (except lead and copper), timber, plastics, painted surfaces, rubber, fibreglass, porcelain, aluminium, and powder-coated surfaces.
Q: How long does Everflex PU-240 take to cure?
A: The sealant cures at a rate of approximately 4mm per 24 hours at 23°C and 65% RH. Cure times may vary depending on temperature and humidity.
Q: Can Everflex PU-240 be painted?
A: Yes, once cured, Everflex PU-240 can be painted with acrylic, oil, and rubber-based paints. Always test adhesion and ensure the paint is flexible to prevent cracking.
Q: What safety precautions should I take when using Everflex PU-240?
A: Ensure proper ventilation, wear appropriate PPE (gloves, safety glasses), and avoid skin and eye contact. If contact occurs, wash thoroughly. Refer to the Safety Data Sheet (SDS) for detailed safety information.
Use Everflex PU-240 for:
- Perimeter sealing of windows and doors.
- Sealing curtain walls and masonry joints.
- Metal cladding and seam sealing.
- Pavement joints, car parks, and driveways.
- General building maintenance and repairs.
- Re-caulking marine teak floors.
- Display signs in hostile environments.
- Vehicular and marine manufacturing.
Why Use Everflex PU-240:
- Durable and Long-Lasting: Provides a robust seal for demanding applications, reducing maintenance needs.
- Flexible and Movement-Accommodating: Prevents cracks and failures in dynamic environments, ensuring structural integrity.
- Versatile Adhesion: Bonds strongly to a wide range of materials, simplifying project logistics.
- Weather and Chemical Resistant: Maintains performance in harsh conditions, extending the lifespan of the seal.
- Ease of Application: Single-component formulation simplifies application, saving time and effort.
How to apply Everflex PU-240:
- Surface Preparation: Ensure surfaces are clean, dry, and free from contaminants. Use appropriate cleaners and primers as needed.
- Joint Preparation: Use a backing rod for deep joints and masking tape for neat lines.
- Application: Cut the nozzle at a 45° angle for sealant application or 90° for adhesive application. Apply a continuous bead of Everflex PU-240.
- Finishing: Tool off with a moistened spatula before skin formation. Remove masking tape while sealant is still wet.
- Cleanup: Clean tools and spills with Xylene while the sealant is wet. Cured sealant can be removed mechanically.
Everflex PU-240 limitations:
- Not suitable for totally confined spaces due to moisture-curing requirements.
- Avoid use in aquariums or internal swimming pool applications with high chlorine levels.
- Not recommended for adhering mirrors or structural glazing without testing.
- May discolour copper and brass.
- Avoid contact with materials containing cleaning agents, solvents, or alcohol during curing.
- Not for use on bituminous, natural rubber, or EPDM rubber surfaces.
- White colour may discolour slightly when exposed to UV rays.
Safety precautions when using Everflex PU-240:
- Personal Protective Equipment: Wear gloves, safety glasses, and respiratory protection in poorly ventilated areas.
- Ventilation: Use in well-ventilated areas. Avoid inhaling fumes.
- Handling: Wash hands thoroughly after handling. Avoid skin and eye contact.
- Storage: Store in a cool, dry place away from direct sunlight and extreme temperatures.
Everflex PU-240 can be used on the following substrates:
- Masonry, Brick, Stone: Ensure surfaces are clean and dry. Priming may be required for optimal adhesion.
- Metal (except lead & copper): Clean and roughen surfaces slightly. Use Adheseal 50A surface prep for non-porous metals.
- Timber: Ensure timber is dry and free from oils or preservatives.
- Plastics: Test adhesion on specific plastics as some may require priming.
- Painted surfaces: Ensure paint is well-adhered. Test for compatibility.
- Rubber, Fibreglass: Clean and roughen surfaces.
- Porcelain, Aluminium, Powder coat: Clean thoroughly. Use appropriate primers as needed.
- Waterproof membranes: Clean and ensure compatibility.
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