Trade quote
Tell us what you need and we'll come back with a quote.
Share your quantity and project details for a tailored quote.
Not sure on how much sealant you'll need? Use our calculator to find out.
Dynamic joints in precast panels, the perimeter of windows, or blockwork demand a sealant that moves without failure and accepts paint. Everflex JS delivers this reliability. It's a high-performance Hybrid Acrylic engineered for +/- 50% movement, offering exceptional weathering and robust adhesion across the building envelope.
Everflex JS is formulated as a Hybrid Acrylic sealant to combine high elasticity, paintability, and broad substrate adhesion. Unlike traditional polyurethanes, it contains no isocyanates, making it a safer choice while still achieving impressive movement capability. This product was developed for applications where a flexible, durable, and aesthetically versatile seal is paramount, especially on surfaces requiring a final painted finish.
+/- 50% Movement Capability: A 10mm joint can expand or contract by 5mm in either direction without compromising the seal. This means long-term flexibility in dynamic applications like precast panel joints or around windows and doors, where thermal expansion and contraction are constant.
100% Elongation: The material can stretch to twice its original length before breaking. This high elongation provides a significant safety margin against unexpected forces, helping to prevent premature joint failure.
UV Accelerated Weathering: No cracking or adhesion loss (ASTM C-732): This ensures the sealant maintains its integrity and appearance even when exposed to harsh Australian sun and weather cycles, critical for external facade and perimeter sealing.
Prepare surfaces by ensuring they are clean, sound, and free from contaminants like dirt or grease. For effective joint performance and to prevent three-sided adhesion, always use a compatible backer rod to control sealant depth. Adheseal backer rod is suitable; open cell is preferred, but closed cell can be used with care to avoid skin damage. If joint depth prevents a backer rod, use bond breaker tape.
Priming is generally not required for most common building materials, simplifying your workflow. However, conduct adhesion testing on suspect or unusual surfaces. Tool Everflex JS immediately after application with a spatula to achieve a flat, non-concave finish. Clean up uncured sealant easily with clean water.
Everflex JS typically serves as the final, critical seal in a system. For demanding applications where adhesion is paramount, it is often applied after surface preparation with a non-porous surface primer like Adheseal 50A Surface Prep, or a porous surface primer where concrete or brick require enhanced bond. This sequence ensures maximum adhesion and joint integrity.
Everflex JS is engineered for high movement joints, accommodating up to +/- 50% of the original joint width. This exceeds typical building practice allowance of +/- 25%, providing extra flexibility in dynamic applications.
Do not apply Everflex JS if rain is expected within 90 minutes. As a water-based sealant, rain before sufficient skin formation can cause washouts. Ensure backer rod is protected from water absorption during the initial cure.
Priming is generally not required for most substrates due to its superior adhesion. However, for any suspect surfaces, an adhesion test is recommended to confirm suitability.
Yes, Everflex JS can be part of a fire-rated joint system. Use it with FireFoam backer rod as specified in the Fire-Foam data sheet to achieve fire resistance.
| Application | Key benefit | Primary trades |
|---|---|---|
| Precast and tilt-up panel joints | Manages significant structural movement with +/- 50% capability, resisting cracking and adhesion loss in varying temperatures (-18°C to 80°C). | Concreters, Facade installers, Builders |
| Window and door frame perimeter sealing | Ensures a durable, weather-resistant seal that accommodates building movement and UV exposure, preventing leaks and maintaining integrity. | Glaziers, Window and door installers, Carpenters |
| Blockwork and brickwork expansion joints | Provides flexible, non-staining sealing for masonry, accommodating thermal expansion and contraction without compromise. | Bricklayers, Block layers, Landscapers |
| Timber and metal panel joints | Offers superior, primer-free adhesion to diverse materials, delivering a paintable finish for aesthetic integration and long-term protection. | Carpenters, Metal fabricators, Shopfitters |
| Sealing various plastics (e.g., Acrylic, Polycarbonate) | Maintains strong adhesion and elasticity on common plastic substrates, reducing the risk of joint failure due to material flex or temperature shifts. | Signwriters, Glaziers, Shopfitters |
A successful joint starts with proper preparation. All surfaces must be completely clean, sound, dry, and free from contaminants like dust, grease, laitance, or loose material that could prevent a solid bond.
Ensure backer rod or bond breaker tape is installed to achieve the correct sealant depth (6mm to 10mm). Apply Everflex JS with steady pressure, ensuring the sealant fills the joint and makes full contact with the sides.
Tool the sealant off immediately after application using a spatula. Push the sealant into the joint to ensure good wet-out and a solid contact area. Aim for a flat or slightly convex finish.
Warning: Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation. Harmful if swallowed.
Wear protective gloves and safety glasses. Suitable gloves should be used for intermittent contact. Always wash hands before eating, drinking, or smoking.
Ensure ventilation is adequate to maintain air concentrations below occupational exposure standards. Use only in well-ventilated areas and avoid generating dusts.
Store in a cool, dry, well-ventilated place, out of direct sunlight, between 5°C and 32°C. Keep containers upright and closed when not in use. Store away from foodstuffs and incompatible materials. This material is a Schedule 5 poison and must be stored, maintained, and used according to relevant regulations. Dispose of product as prescribed waste in accordance with state and local regulations.
Proper substrate preparation is critical for the long-term performance of Everflex JS, ensuring optimal adhesion and joint integrity.
Surface prep: Surfaces must be clean, sound, and free from dirt, grease, laitance, loose particles, or other contaminants. This ensures a strong, uniform bond.
Primer: Not required. Everflex JS offers superior adhesion without priming for these common substrates. However, adhesion testing is recommended for any substrate where bond strength is uncertain.
Surface prep: Ensure all plastic surfaces are thoroughly cleaned and degreased. Remove any protective films or mould release agents that may compromise adhesion.
Primer: Not required. Everflex JS is formulated to adhere effectively to many plastics without additional priming. For critical or unfamiliar plastic types, conduct an adhesion test.
| Property | Value |
|---|---|
| Product Type | Hybrid Acrylic |
| Density | 1.06 (specific gravity) |
| Elongation | 100% |
| Service Temperature | -18°C to 80°C |
| Movement Capability | +/- 50% |
| Low Temp Flexibility | No cracking or adhesion loss (ASTM C-734) |
| UV Accelerated Weathering | No cracking or adhesion loss (ASTM C-732) |
| Form | Paste |
| Colour | Grey |
| Odour | Acrylic odour |
| Solubility | Miscible with water |
| Specific Gravity | 1.0 - 1.1 Kg / Lt |
| Boiling Point Range | >100 °C |
| Shelf Life | Minimum 12 months |
| Hazard Rating Health | 1 (Slight) |
| Hazard Rating Flammability | 1 (Slight) |
| Hazard Rating Reactivity | 0 (Minimal) |
Here are some common examples on where Everflex JS Hybrid Acrylic Sealant used by our customers.
