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Adheseal Allflex 101 is a hybrid acrylic joint sealant that provides high-elasticity weatherproofing for interior and exterior building substrates, with a transition from white application to a clear finish upon cure. It serves as a glazing and bedding compound for timber joinery and seals gaps in precast panels, windows, and roofing materials like polycarbonate.
The formulation is non-toxic, non-hazardous, and free of isocyanates, reducing site risk while maintaining 1000% elongation at break. Because Adheseal Allflex 101 adheres to most common building materials without the necessity of priming, it streamlines installation workflows for tilt-up construction and general blockwork.
Frequently Asked Questions
Why is Allflex 101 white when I apply it if it's a clear sealant?
Allflex 101 is a water-based acrylic that is formulated to be white upon application. This makes it easy for you to see where you've applied it and to tool it for a perfect finish. As the water evaporates and the sealant cures, it will transition to become completely clear.
How long does it take for Allflex 101 to fully cure and turn clear?
The cure time depends on bead size, temperature, and humidity. It skins in about 10 minutes and cures at approximately 2mm per day. A full cure can take 4-6 days. Curing will be slower in cold or humid conditions, or when applied between two non-porous surfaces, as it relies on water evaporation.
Is this product suitable for bathrooms or kitchens?
Yes, Allflex 101 is mould resistant and suitable for interior use, including sealing around vanities, cupboards, and splashbacks. However, it is not suitable for permanent water immersion, so it should not be used inside shower recesses, bathtubs, or swimming pools.
What is the best way to get a clean finish?
For perfectly straight lines, mask both sides of the joint with tape. Apply the sealant, then tool it off immediately with a wet finger or spatula to a flat, not concave, finish. Remove the masking tape while the sealant is still wet. Excess sealant can be easily cleaned up with water.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Sealing gaps around windows, doors, skirting boards, and architraves. | Extreme flexibility (+/- 50% movement) and superior paintability prevents cracks for a lasting finish. | Painters, Carpenters, Builders, Remedial |
| Glazing and bedding timber joinery. | Provides a clear, flexible, and paintable seal that bonds strongly to both timber and glass. | Joiners, Glaziers, Carpenters |
| Sealing polycarbonate or acrylic roofing and signage. | Outstanding primerless adhesion to plastics where silicones often fail. Dries clear for an invisible seal. | Roofers, Builders, Sign Manufacturers |
| Sealing precast panels, tilt-up construction, and weatherboards. | Excellent weather resistance and the ability to handle high joint movement ensures long-term durability. | Builders, Precasters, Façade Installers |
| General purpose interior/exterior gap filling. | Non-toxic, mould resistant, and easy water clean-up makes it a versatile, user-friendly sealant for all trades. | All Trades, Maintenance, DIY |
Applying Allflex 101: Professional Protocols
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Surface Preparation
The foundation of a permanent, flexible seal is a perfectly prepared surface. All substrates must be structurally sound, stable, clean, and completely dry.
Dust & Debris Removal
Remove all dust, loose material, flaking paint, and old sealant. For non-porous surfaces, perform a two-wipe clean with methylated spirits.
Joint Design
For expansion joints, ensure a minimum width of 6mm and use a backing rod to control depth to a 2:1 or 3:1 width-to-depth ratio. Use bond-breaker tape to prevent three-sided adhesion.
Pro Tip: For exceptionally neat lines, especially when painting, use a high-quality masking tape on both edges of the joint. -
Application & Tooling
Apply at temperatures between 5°C to 40°C. Cut the nozzle at a 45° angle to the desired thickness. Push the white sealant ahead of the nozzle, ensuring the joint is completely filled.
Timing: Tool off immediately (within 10 minutes) before the skin forms. Use a spatula or wet finger to create a flat, smooth finish.Pro Tip: When tooling, maintain a wet edge with water. This prevents the sealant from sticking to your tools and allows for a much smoother finish. -
Clean-up & Curing
One of the greatest advantages of Allflex 101 is the simple clean-up process and its visual cure indicator.
Cleaning While Wet
Immediately clean any excess sealant or spills from surfaces and tools using a damp cloth and water. Remove masking tape while the sealant is still wet.
Curing Process
Protect the joint from rain or water until the sealant has turned from white to fully clear. A full cure may take 4-6 days depending on conditions.
Limitations & Safety
Product Limitations
Not for permanent water immersion. Do not use in swimming pools, fish tanks, or below the waterline.
Not suitable for areas with high abrasion or foot traffic, such as floor joints.
Not recommended for use on natural stone. A stain test is mandatory before considering use.
Use Adheseal S100 Neutral Cure Silicone
Not suitable for structural glazing applications.
Use Adheseal N-80 or N-60
Must be protected from water and rain until fully cured (has turned from white to clear).
Do not enclose between two non-porous surfaces (e.g., metal to metal lap joint), as this will prevent air access and stop the sealant from curing.
Safety & Handling Requirements
Non-Hazardous Status
This material is not classified as hazardous according to Safe Work Australia criteria. It is non-toxic and contains no isocyanates, making it a safer choice for everyday use.
General Precautions
Even with a non-hazardous product, good work practices are recommended. Avoid eye contact and prolonged skin contact. Use with adequate ventilation. Keep out of reach of children.
Emergency First Aid
Eyes:
Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do so. Continue rinsing.
Skin:
Wash with soap and water. It is not classified as a skin irritant.
Inhaled:
Remove to fresh air. Symptoms are not expected under normal use.
Swallowed:
Rinse mouth. DO NOT induce vomiting. Seek medical attention if symptoms develop.
If poisoning occurs, contact a doctor or Poisons Information Centre (13 11 26).
Adhesion & Preparation Guide
Polycarbonate & Acrylic
Surface Preparation
Ensure plastic sheeting is clean, dry, and free of any protective film, oils, or dust. Clean with a suitable, non-aggressive cleaner like methylated spirits using a two-wipe process.
Primer Requirements
No primer typically required
Allflex 101 exhibits outstanding adhesion to most acrylic and polycarbonate surfaces without the need for a primer, making it ideal for roofing and sign applications.
Timber & Timber Joinery
Surface Preparation
Surface must be sound, clean, and dry. For painted timber, ensure the paint is well-adhered. For oily timbers, wipe with a solvent to remove surface oils before application.
Primer Requirements
No primer typically required
Primer is not normally required for most common timbers. For critical performance or on weathered timber, a primer like Everflex Supaprime can be considered after an adhesion test.
Concrete & Brickwork
Surface Preparation
Surfaces must be free of dust, loose particles, and laitance. New concrete should cure for at least 28 days. Ensure the surface is dry before application.
Primer Requirements
Primer recommended for critical applications
For highly porous or friable surfaces, priming with Everflex Supaprime will consolidate the surface and enhance long-term adhesion.
Metals & Powder Coat
Surface Preparation
Ensure surface is clean, dry, and free of oils or oxidation. Use a two-wipe process with a solvent. A light abrasion with a fine pad on powder-coated surfaces can improve the mechanical key.
Primer Requirements
Primer recommended for critical applications
Adhesion is typically excellent. For high-stress joints or maximum performance, pre-treating with Adheseal 50A Surface Prep is recommended.
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