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Your timber joinery needs a clear, flexible seal. The joinery gets painted. The sealant shouldn't crack or discolour when the building moves, nor should it fight the paint. You need a joint that disappears and performs, providing both glazing integrity and a paint-ready finish for windows, doors, and weatherboards. Allflex 101 delivers this: a high-movement, clear-curing, paintable hybrid.
We developed Allflex 101 as a safer, non-hazardous alternative to traditional silicone and solvent-borne sealants, specifically for timber joinery and demanding general building movement joints. It brings the paintability and easy cleanup of an acrylic with the high elasticity and weather resistance of a hybrid. No isocyanates means a safer product for continuous use, particularly in enclosed spaces or high-volume applications like window and door manufacture.
Every joint on a building moves. Allflex 101 handles ±50% joint movement. That means a 10mm joint can compress or extend by 5mm, twice the flexibility of many standard sealants. Its 1000% elongation at break ensures this flexibility translates into genuine crack resistance, even when applied to visible surfaces like painted timber. It dries clear from an initial white, making it invisible once cured. With a low VOC count of 32gm/lt, it meets stringent air quality standards, promoting a safer environment for applicators and occupants. Apply it across a wide temperature range, from -18°C to +60°C, ensuring project continuity through seasonal changes.
Allflex 101 applies as a soft white paste, then cures to a crystal-clear finish. Ensure surfaces are clean, dry, and free of contaminants. While priming is not usually required, for optimal adhesion on non-porous substrates, pre-treat with Adheseal 50A Surface Prep. For porous surfaces like concrete, use Everflex Supaprime Sealant Primer. Apply the sealant within the 5°C to 40°C temperature range. Tool off the joint with a moistened spatula within the 10-minute skin time to achieve a smooth finish. For best results, protect the joint from water until it dries clear. Clean wet spills and tools with Xylene; use Adheseal Hand Wipes for skin.
As a flexible joint sealant, Allflex 101 typically serves as the final weatherproofing and aesthetic finishing layer in construction and joinery systems. For optimal performance in highly stressed or critical joints, always ensure proper surface preparation. This might involve using Adheseal 50A Surface Prep for non-porous materials or Everflex Supaprime Sealant Primer for porous substrates. For joints deeper than 10mm, control sealant depth and prevent three-sided adhesion with a compatible Adheseal backer rod, ensuring the sealant cures and performs optimally.
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.
