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Biyseal Acrylic Impregnated Foam is a specialized polyurethane joint sealant designed for high-movement expansion joints in precast concrete and civil infrastructure. This acrylic-impregnated system maintains over 90% elastic recovery, allowing the seal to rebound during extreme thermal cycling to prevent water ingress and structural spalling.
By achieving 75% compression, installers create a mechanical watertight barrier against heavy rain without the surface preparation risks or cure-time delays associated with traditional liquid sealants.
Frequently Asked Questions About Biyseal Acrylic Impregnated Foam
Q: Can I use Biyseal Acrylic to seal joints exposed to direct rain?
A: Yes. When compressed to 75% of its original width, Biyseal Acrylic effectively seals against heavy rain and water ingress. It's ideal for exposed cladding gaps, expansion joints, or polycarbonate roofing installations.
Q: Is it suitable for sealing dynamic joints like precast panel gaps?
A: Absolutely. With over 90% elastic recovery, Biyseal Acrylic is engineered for dynamic movement, making it ideal for precast concrete joints and modular building interfaces.
Q: Can I paint over Biyseal Acrylic?
A: Yes, it is compatible with water-based paints. Ensure the foam has expanded and is dry before painting to ensure proper adhesion and finish.
Q: How do I join two strips together?
A: Use a wet knife to splice the ends on an angle and butt them together. This ensures a continuous, tight seal along the joint line without gaps.
Q: Will it lose performance in hot or cold weather?
A: No. Biyseal Acrylic functions reliably between –10°C and +70°C, maintaining sealing performance and flexibility across most Australian environments.
Applications Where Biyseal Acrylic Impregnated Foam Excels:
- Expansion joints in precast concrete panels: Maintains flexibility and water resistance, even during seasonal thermal movement or seismic shifts.
- Back channel foam for polycarbonate roofing: Fills channels and blocks rain, insects, and dust without mess or tools.
- Window and door perimeter sealing: Prevents drafts and water leaks, enhancing thermal efficiency and comfort.
- Vehicle, caravan, or trailer assembly: Provides a vibration-resistant and waterproof seal that can endure on-road movement and temperature extremes.
- Electrical and HVAC cabinets: Forms a reliable gasket seal against weather and dirt ingress, improving performance and safety.
Top Benefits of Using Biyseal Acrylic Impregnated Foam on Your Projects:
- Highly Durable & Long-Lasting: Acrylic-impregnated foam resists ageing, UV, and water—ideal for long-life installs.
- Fast & Easy Application: No gunning, no tooling, no curing. Apply it and move on—perfect for tight schedules.
- Adaptable for Multiple Trades: One product for HVAC, glazing, cladding, vehicle bodywork, and concrete—streamlines your inventory and training.
Step-by-Step Application Guide for Biyseal Acrylic Impregnated Foam:
- Preparation is Paramount: Ensure joint or surface is clean, dry, and free from oil, grease, or dust. For porous surfaces like concrete, brushing or vacuuming may be required. Avoid installing when surfaces are damp.
- Nozzle & Gun Setup: Not required. Biyseal comes as pre-cut strips. Select the correct width for your joint and trim length with a sharp knife or scissors.
- Application Technique: Compress foam manually or with a roller into the joint. Ensure continuous pressure and avoid gaps. Biyseal will self-expand slightly to fill voids.
- Tooling for a Professional Finish: Use a damp knife to compress ends or shape corners. For neat termination, cut at a 45° angle and butt splice with slight overlap if needed.
- Clean-Up: No solvents required. Simply wipe tools clean or discard offcuts. Biyseal has no odour or tack.
- Curing Process: No curing time required. The foam provides immediate sealing performance once installed at proper compression level.
Important Limitations & Safety When Using Biyseal Acrylic Impregnated Foam:
Product Limitations:
- Not suitable for submerged or underwater use: Use Adheseal WetGrab for continuous immersion conditions.
- May not adhere well to oily or greasy substrates: Always clean surfaces thoroughly before applying foam to ensure expansion and grip.
Safety First – Protecting Yourself and Your Workspace:
- Personal Protective Equipment (PPE): Gloves are recommended to avoid minor skin irritation. No harmful vapours or solvents.
- Ventilation: No special ventilation needed. Safe fo
Biyseal Acrylic Impregnated Foam Adhesion Profile – Compatible Substrates:
- Concrete (Precast or Rendered): Ensure surfaces are dry and free of dust or laitance. Suitable for use between precast panels or wall junctions.
- Timber (Framing or Window Reveals): Compatible with most treated and untreated softwoods/hardwoods. Ideal for sealing around doors and windows.
- Polycarbonate Sheeting (Back Channels): Foam fits into U-channel profiles to create an effective weather and insect barrier.
- Metal Roofing and Cladding: Use between overlapping metal or Custom Orb profiles. Compress foam into place prior to fixing.
- Aluminium Frames or Flashings: Clean of any oxidation or grease. Biyseal compresses and expands to provide a flexible yet durable interface seal.
- Electrical Cabinets or HVAC Panels: Can be used to weatherproof access panels, junction boxes, or air-conditioning enclosures.
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