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Use Everflex JS for: Sealing joints in windows, doors, precast panels, and various construction materials, offering excellent weather resistance and flexibility.
Everflex JS is a premium hybrid acrylic joint sealant engineered for superior performance in diverse environments. Its low modulus and high elasticity accommodate significant joint movement, preventing cracks and ensuring long-lasting seals. With exceptional adhesion to most building materials, including timber, metal, and plastics, Everflex JS eliminates the need for priming in many applications. Its non-sagging formula and smooth tooling properties make it easy to achieve a professional finish.
Key Features of Everflex JS High Performance Joint Sealer
- Excellent weathering ability, ensuring long-term durability.
- Superior adhesion to a wide range of substrates without the need for priming.
- High elasticity (low modulus) accommodates significant joint movement.
- Paintable, allowing for seamless integration with surrounding surfaces.
- Non-toxic and low VOC, contributing to a healthier environment.
- Excellent slump resistance, maintaining a smooth finish on vertical surfaces.
Technical Overview
- Chemical Properties: Hybrid Acrylic
- Application Temperature Range: 5°C to 32°C (41°F to 89.6°F)
- Service Temperature: -18°C to 80°C (-0.4°F to 176°F)
- Movement Capability: ±50%
- VOC Content: 32 g/L
- Elongation: 1000%
Trade Professional Information
- Required Tools: Caulking gun, spatula, backer rod or bond breaker tape.
- Trade-Specific Tips: Ensure joints are clean and dry before application. Use a backer rod or bond breaker tape to control joint depth and prevent three-sided adhesion. Tool the sealant immediately after application for a smooth finish.
- Common Issues and Solutions: Prevent washouts by avoiding application during rain or within 90 minutes of expected rainfall. Ensure backer rod is dry to avoid gassing.
Storage and Shelf Life
- Storage Requirements: Store between 5°C and 32°C (41°F and 89.6°F) in unopened containers.
- Shelf Life Information: Minimum 12 months.
- Temperature Considerations: Avoid extreme temperatures to maintain product integrity.
Certifications
- Meets Spec. TT-S-00230C, Class A and ASTM Spec. 834.
- Conforms to Californian South Coast Air Quality Management Rule 1168.
Frequently Asked Questions About Everflex JS High Performance Joint Sealer
Q: Can Everflex JS be used in wet conditions?
A: Everflex JS should not be used when rain is evident within 90 minutes of application. Rain may cause washouts if the sealant hasn't formed a skin. Ensure the joint is capped to prevent water soaking into the backing rod.
Q: Do I need to prime surfaces before applying Everflex JS?
A: Priming is generally not required for most substrates. However, for suspect surfaces, adhesion testing is recommended to ensure optimal bonding.
Q: What is the recommended joint design for Everflex JS?
A: Good building practice allows for ±25% movement, though Everflex JS can handle ±50%. The minimum sealant depth is 6mm, and the maximum is 10mm, regardless of joint width. Maintain a 2:1 depth-to-width ratio.
Q: How do I prevent three-sided adhesion with Everflex JS?
A: Use a backer rod or bond breaker tape to control joint depth and prevent the sealant from adhering to the back of the joint, allowing for proper movement.
Q: Is Everflex JS paintable?
A: Yes, Everflex JS is paintable, allowing for seamless integration with the surrounding surfaces and finishes.
Q: What is the shelf life of Everflex JS?
A: Everflex JS has a minimum shelf life of 12 months when stored between 5°C and 32°C (41°F and 89.6°F) in unopened containers.
Q: What are the cleanup instructions for Everflex JS?
A: Uncured sealant can be removed with water. Cured sealant will need to be removed by mechanical means.
Use Everflex JS High Performance Joint Sealer for:
- Sealing expansion joints in concrete and masonry.
- Weatherproofing window and door frames.
- Sealing joints between precast concrete panels.
- Creating flexible seals in tilt-up construction.
- Sealing joints in cladding and curtain wall systems.
- Joining dissimilar materials that experience thermal movement.
- General construction joint sealing, both interior and exterior.
Why Use Everflex JS High Performance Joint Sealer:
- Provides a highly flexible seal that accommodates significant joint movement.
- Offers excellent weather resistance, ensuring long-term durability.
- Superior adhesion to various substrates eliminates the need for priming.
- Easy to apply and tool, resulting in a professional finish.
- Paintable, allowing for seamless integration with surrounding surfaces.
- Non-toxic and low VOC, contributing to a healthier environment.
- Suitable for a wide range of interior and exterior applications.
- Meets industry standards for high-performance joint sealants.
How to apply Everflex JS High Performance Joint Sealer:
- Prepare the joint: Clean surfaces and insert a backer rod or bond breaker tape.
- Apply the sealant: Cut the nozzle to the desired bead size and apply a continuous bead.
- Tool the sealant: Smooth the sealant with a spatula immediately after application.
- Clean up: Remove uncured sealant with water.
Everflex JS High Performance Joint Sealer limitations:
- Should not be applied when rain is expected within 90 minutes.
- Not recommended for continuous underwater applications.
- Requires a dry backer rod to prevent gassing.
- Not suitable for joints consistently exposed to high mechanical stress without testing.
Safety precautions when using Everflex JS High Performance Joint Sealer:
- Personal Protective Equipment: Wear gloves and eye protection.
- Ventilation: Ensure adequate ventilation during application.
- Handling: Avoid skin and eye contact. Wash hands after use.
- First Aid: For skin contact, wash with soap and water. For eye contact, flush with water. If ingested, seek medical advice.
Everflex JS High Performance Joint Sealer can be used on the following substrates:
- Windows and doors (ensure clean, dry surfaces for optimal adhesion).
- Precast panels and tilt-up construction (suitable for large, moving joints).
- Blockwork and brickwork (provides a flexible, weatherproof seal).
- Timber (ensure timber is dry and free of treatments that may affect adhesion).
- Metal (clean and free of rust or corrosion).
- Acrylic and polycarbonate (suitable for various plastic substrates).
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