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For sealing and adhering interior and exterior building joints subject to movement, Allflex 101 Hybrid Acrylic Sealant provides a clear finish that cures by water evaporation. It applies white for high visibility during installation and transitions to clear as it dries. The formulation is low-modulus to accommodate joint movement of ±25% without cracking or losing adhesion, making it suitable as a glazing and bedding compound for timber joinery, and for sealing around windows, doors, and precast panels.
Allflex 101 is a hybrid acrylic sealant that relies on atmospheric humidity and the evaporation of water to cure. It dries to a highly elastic, clear solid with a Shore A hardness of 10, maintaining its flexibility in both hot and cold climates. The sealant resists slumping during vertical applications and exhibits strong adhesion to both porous and non-porous substrates without a primer. Because it contains no isocyanates, it is non-toxic, non-hazardous, and paintable after curing.
Suitable for sealing and adhering to the following substrates:
Surfaces must be structurally sound, dry, clean, and free of dust, oils, grease, curing compounds, and surface water. Concrete must cure for at least 28 days before application to prevent subsequent delamination.
For expansion joints, design the joint width-to-depth ratio at 2:1 where possible.
Tool the joint flat with a moistened spatula within 10 minutes of application. Clean wet tools and spills with water or Xylene; cured material must be removed mechanically.
While Allflex 101 normally adheres without priming, specific joint conditions require surface pre-treatment:
Yes, Allflex 101 is suitable for polycarbonate roofing joints. The product is designed for adhesion to acrylic and polycarbonate while remaining flexible under movement and weather exposure. Protect the sealant from water until it cures clear.
Yes, Allflex 101 is paintable once cured. Its hybrid acrylic formulation is intended for joints where flexibility and paint finish are both required. Always carry out compatibility testing with specialty coatings.
No, Allflex 101 is not suitable for permanent water immersion. The product is not designed for continuously submerged environments such as pools or aquariums. Using it in immersion conditions can lead to failure.
Allflex 101 is rated for ±25% joint movement. That flexibility helps accommodate expansion and contraction around windows, doors, cladding, and façade joints without cracking under normal movement conditions.
Usually not on most common building substrates. For highly stressed joints or difficult surfaces such as some metals and plastics, surface preparation and primer systems may still be recommended to improve long-term adhesion.
| Application | Key benefit | Primary trades |
|---|---|---|
| Timber joinery glazing and bedding | Cures clear while remaining flexible for long-term movement accommodation | Glaziers, carpenters, joinery installers |
| Window and door perimeter sealing | ±25% movement capability helps prevent cracking around openings | Builders, façade installers, window contractors |
| Polycarbonate roofing joints | Compatible with acrylic and polycarbonate substrates without requiring rigid sealants | Roofers, patio installers |
| Tilt-up and precast panel joints | Strong adhesion with low modulus flexibility for exterior movement joints | Commercial builders, concrete contractors |
| Weatherboard and cladding joints | Paintable finish supports cleaner façade presentation after sealing | Painters, cladding installers |
The foundation of a permanent, flexible seal is a perfectly prepared surface. All substrates must be structurally sound, stable, clean, and completely dry.
Remove all dust, loose material, flaking paint, and old sealant. For non-porous surfaces, perform a two-wipe clean with methylated spirits.
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.
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.
One of the greatest advantages of Allflex 101 is the simple clean-up process and its visual cure indicator.
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.
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.
Wear nitrile gloves, safety glasses, apron, and respirator where inhalation risk exists.
Use with adequate ventilation. Where inhalation risk exists, use an organic vapour and particulate respirator meeting AS/NZS 1715 and AS/NZS 1716 requirements.
Store in cool, dry conditions between 10°C and 35°C. Shelf life is 24 months in original unopened packaging.
Correct surface preparation improves adhesion performance and reduces the risk of joint failure on difficult or highly stressed substrates.
Surface prep: Slightly roughen aluminium, waterproof membranes, anodised aluminium, stainless steel, PVC, galvanised steel, powder-coated metals, or glazed tiles using a fine abrasive pad. Clean using the two-wipe process with a suitable cleaner such as methylated spirits.
Primer: Optional. Adheseal 50A Surface Prep may be used for critical joints or high-performance applications. Allow 30 minutes minimum and 2 hours maximum before applying sealant.
Surface prep: Concrete must cure for at least 28 days and remain dry, stable, and free from dust, oils, curing compounds, and loose material before sealing.
Primer: Optional. Everflex Supaprime may be used on concrete, aerated concrete, cement renders, mortars, and brickwork where improved long-term adhesion is required.
| Property | Value |
|---|---|
| Product Name | Allflex 101 |
| Type Of Product | Hybrid Acrylic |
| Primary Function | Joint Sealant, Adhesive & Bedding Compound |
| Curing System | Evaporation of water |
| Movement Capability | ±25% |
| Elongation At Break | 1150% |
| Shore A Hardness | 10 |
| Density | 1.04 |
| Consistency | Soft paste |
| Skin Time | Approximately 10 minutes |
| Cure Time | 2mm per 24 hours |
| Working Time | 30 minutes @ 23°C & 50% RH |
| Application Temperature | 5°C to +35°C |
| Storage Temperature | 10°C to 35°C |
| VOC | 24gm/lt |
| Shelf Life | 24 months in original packaging |
| Clean Up | Water while wet, mechanical removal when cured |
| Colour | White when applied, clear when cured |
| Packaging | 300ml Cartridge |
| Acceptable Substrates | Masonry, cement sheet, glass, brick, metal except lead and copper, timber, plastics, acrylic, polycarbonate, stone, painted surfaces, rubber, fibreglass, porcelain, aluminium, powder coat, waterproof membranes |
| UV Weathering Test | ASTM C-732 UV Accelerated Weathering - No cracking or adhesion loss |
| Durability Test | Aymar cyclic durability glass class A sealant - Pass |
Here are some common examples on where Adheseal Allflex 101 Hybrid Acrylic Sealant used by our customers.
