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11

Adheseal Gap Filla Acrylic Sealant

Flexible acrylic sealant that handles ±5% movement, so joints around frames and plasterboard stay sealed instead of cracking and falling out. Tack free in 15-20 minutes at 25°C, water cleanup, and 22 gm/Lt VOC means you paint fast and keep the air clean on site. Not for structural joints or continuous water exposure. For interior and exterior non-structural gaps up to 10mm, it does the job without the callbacks.
Vendor: Adheseal
SKU: GAPFILLA/CTG
Availability: In Stock
$3.15
$3.15
Prices do not include GST
Adheseal tool

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Shipping & Delivery

Flat-rate shipping $17.95 + GST (metro and standard zones). Excludes remote/regional/high-cost postcodes and certain items (DG, oversized, long-length, or bagged products 15 kg+). If your order includes any of these, we will contact you to arrange additional freight charges. Online purchases only.

Cracked paint lines along architraves. Useless filler crumbling from cornices. Gaps reappearing after painting, demanding rework. Adheseal Gap Filla stops the cycle. This flexible, paintable acrylic sealant handles minor structural movement, keeping joints clean and intact. You paint once. It stays painted.

Why this product exists

Gap Filla was specifically formulated to address a common site frustration: rigid fillers that crack and fall out of joints. When minor building movement or thermal expansion occurs, a brittle filler fails. This acrylic sealant provides enough flexibility to accommodate these shifts. It ensures gaps stay sealed, reducing costly callbacks and ensuring a professional finish that lasts.

The numbers that matter

  • Dynamic Movement: +/- 5%. This rating indicates Gap Filla can expand and contract by 5% of its joint width without failing. For a 10mm joint, that means it flexes up to 0.5mm in either direction. This range is crucial for sealing non-structural joints around frames or plasterboard, where slight movement is expected and typical rigid fillers would crack.
  • Tack Free: 15-20 minutes at 25°C. This rapid skinning time allows you to paint over the sealant quickly, reducing project downtime. Within minutes, the surface is dry enough to touch without transferring, making it efficient for high-volume interior finishing work.
  • VOC: 22 gm/Lt. This low Volatile Organic Compound content complies with Californian South Coast Air Quality Management Rule 1168, contributing to better indoor air quality on your projects.

What it's like to use

Adheseal Gap Filla is a smooth paste, easy to apply between +5°C and +35°C. Tooling is straightforward. The most significant benefit for site efficiency is its water cleanup. Simply use water to smooth and clean tools immediately after use, eliminating the need for harsh solvents. Store cartridges in a cool, dry place between 10°C and 35°C.

Where this product excels

  • For Carpenters: Sealing window and door frames. Its flexibility prevents unsightly cracks along architraves, ensuring the joinery finish remains crisp and paintable.
  • For Plasterers: Filling gaps in cornices and plasterboard joints. The flexible acrylic formula moves with minor building shifts, significantly reducing callbacks for cracking plaster or paint lines.
  • For Painters: As a paintable gap filler for interior trim and wall junctions. The rapid tack-free time means you can paint over it within 15-20 minutes, streamlining your workflow and delivering a smooth, integrated finish.
  • For Tilers and Renovators: Sealing gaps around tiles in non-wet areas. It adheres well to ceramic and concrete, preventing grout lines from cracking where minor movement occurs.

Choose this when

  • When you need a flexible sealant for interior joints with minor movement, such as around window or door frames.
  • When the final finish requires painting, and you need the sealant to be paintable within minutes.
  • When water cleanup is preferred for ease of use and site efficiency.
  • When sealing gaps in plasterboard, cornices, or along skirting boards where rigid fillers are prone to cracking.

Don't use this when

This product's low VOC content of 22 gm/Lt meets stringent Californian South Coast Air Quality Management Rule 1168 standards. It is not classified as hazardous by WorkSafe Australia, though basic PPE is recommended during handling.

Frequently asked questions

Can I use Adheseal Gap Filla around window frames before painting?

Yes, Adheseal Gap Filla is designed for sealing joints around window and door frames, cornices, and plasterboard. Its flexible acrylic formulation helps prevent cracking, and it is fully paintable once cured.

Is Adheseal Gap Filla suitable for wet areas like bathrooms?

No, Adheseal Gap Filla is not recommended for continuous water immersion. It is best suited for interior gaps or exterior areas not subject to constant moisture exposure.

What kind of movement can Adheseal Gap Filla handle?

Adheseal Gap Filla accommodates dynamic movement of +/- 5%. This flexibility helps prevent cracking in static joints that experience minor structural shifts, outperforming more rigid fillers.

Applications and benefits

Where Adheseal Gap Filla is used, what it delivers, and who uses it
Application Key benefit Primary trades
Sealing window and door frames +/- 5% dynamic movement prevents cracking from minor structural shifts. Paintable finish for seamless integration. Carpenters, Painters, Builders
Filling gaps in cornices and plasterboard Flexible acrylic formula reduces callbacks from plaster or paint cracking. Water clean-up for efficient site work. Plasterers, Painters
Sealing joints in sidings and vents Good adhesion to wood, metal, and concrete. Accommodates slight thermal movement for exterior finishes. Builders, Roofers
Gaps around tiles Prevents grout cracking in non-wet areas. Adheres well to ceramic and concrete substrates. Tilers, Renovators

Applying Adheseal Gap Filla: Enhanced Protocols & Best Practices

  1. Surface Preparation

    A successful, long-lasting seal starts with a properly prepared surface. This step is critical to ensure maximum adhesion.

    Cleaning the Joint

    Ensure the joint is completely clean, dry, and free from all dust, dirt, oil, grease, and loose or flaking paint. Use a brush or vacuum to remove all dust.

    Pro Tip: For a neater finish and easier cleanup, you can mask both sides of the joint with painter's tape before applying the sealant.
  2. Application & Tooling

    Apply and finish the sealant bead for a smooth, professional result.

    Applying the Sealant

    Cut the nozzle at a 45° angle to the desired bead size. Using a caulking gun, apply a steady, continuous bead of sealant into the joint, ensuring it fills the entire gap.

    Tooling for a Smooth Finish

    Immediately after application, tool the bead with a wet finger or a clean spatula to create a smooth, concave surface and ensure intimate contact with the substrates.

    Timing: The sealant will be tack-free in 15-20 minutes. Full cure takes 24-48 hours, depending on conditions. Do not expose to water until a durable skin has formed.
  3. Cleanup & Painting

    Final steps for a clean job site and a perfect painted finish.

    Immediate Cleanup

    Clean up any excess sealant from surfaces and tools immediately using a damp cloth. Once cured, the sealant must be removed mechanically.

    Painting

    Once the sealant is fully cured (allow 24-48 hours), it can be painted over with most conventional water or oil-based paints.

    Pro Tip: If you used masking tape, remove it immediately after tooling the sealant bead to create a perfectly clean edge.

Product limitations

  • Not for: Water immersion or prolonged exposure to high moisture.
  • Not for: Use in chemical environments.
  • Not for: Food contact applications.
  • Not for: High temperature applications, such as around stoves or fireplaces.
  • Not for: Joints with dynamic movement exceeding +/- 5%. It is intended for static or low-movement joints.

Safety and handling

Warning: Causes skin irritation. May cause an allergic skin reaction. May cause allergy or asthma symptoms or breathing difficulties if inhaled. May cause damage to organs through prolonged or repeated exposure. Classified as a Schedule 5 Poison (Caution).

Personal protective equipment

Wear gloves (Nitrile Rubber suggested), apron, safety glasses, and a respirator (organic vapour/particulate type if inhalation risk exists).

Ventilation

Ensure adequate ventilation to maintain air concentrations below exposure standards. Use only in well-ventilated areas.

First aid

  • Inhalation: Remove person to fresh air and keep comfortable for breathing.
  • Skin contact: Wash skin with plenty of soap and water. If skin irritation or rash occurs, seek medical attention.
  • Eye contact: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do, then continue rinsing. Seek medical advice if irritation persists.
  • Ingestion: Do not induce vomiting. Call a doctor or Poisons Information Centre immediately (Australia 131 126).

Storage and disposal

Store in a cool, dry, well-ventilated place, out of direct sunlight and away from foodstuffs. Keep containers standing upright and closed when not in use. Shelf life is 12 months in original packaging when stored between 10°C and 35°C. Dispose of contents and container according to local regulations; do not allow product to reach ground water or sewage systems.

Substrate guide

Proper surface preparation is crucial for effective adhesion and long-term performance. This guide covers common substrates for Adheseal Gap Filla.

General preparation for common building materials

Surface prep: Ensure all surfaces are clean, dry, and free from dust, grease, loose particles, and old sealant. For porous substrates, ensure they are sound and stable.

Primer: Not required for most common building materials like glass, ceramic, wood, brick, metal, and concrete when clean and dry.

Adheseal Gap Filla Acrylic Sealant Physical Properties

Adheseal Gap Filla Acrylic Sealant Physical Properties
Property Value
Product Name Adheseal Gap Filla
Type of Product Acrylic Polymer
Curing System Water Evaporation
Consistency Smooth Paste
Colour White
Density (Specific Gravity) 1.50 g/cm3
pH 7 - 9
Application Temperature +5°C to +35°C
Dynamic Movement +/- 5%
Tack Free Time at 25°C 15 - 20 minutes
Cure Time at 25°C 24 - 48 hours
VOC Content < 1 g/L
Clean Up Water
Shelf Life 12 months in original packaging

Adheseal Gap Filla Acrylic Sealant - Use Cases

Here are some common examples on where Adheseal Gap Filla Acrylic Sealant used by our customers.

Painting

Repair Plasterboard Cracks

Rapidly fill minor non-structural cracks or panel gaps in plasterboard prior to surface preparation and painting.

Its fast tack-free time allows quick repairs and painting, while flexibility prevents cracks from re-emerging post-finish.

  • Tack free 15-20 minutes
  • Dynamic movement +/- 5%
  • Paintable after 15 minutes
  • Adheres to plasterboard, concrete

Caulking

Interior Trim Gap Sealing

Sealing gaps around window frames, door frames, or cornices during interior fit-out.

Its flexibility prevents unsightly cracks in painted joints, while being ready for paint in under 30 minutes.

  • Dynamic movement +/- 5%
  • Tack free 15-20 min
  • Paintable in 30 minutes
  • Water clean-up finish

Caulking

Plasterboard Joint Finishing

Filling minor movement gaps where plasterboard meets other surfaces or internal corners.

This acrylic sealant accommodates minor structural shifts, preventing common cracking failures in painted plasterboard joints.

  • Dynamic movement +/- 5%
  • Adheres to plasterboard, wood
  • Cure time 24-48 hours
  • VOC 22 gm/Lt

Tiling

Interior Fixture Perimeter Seal

Sealing perimeters around interior vents, light fixtures, or tiles in dry or splash-zone areas.

Provides a flexible, paintable seal around various interior fixtures, preventing gaps and simplifying finishing work.

  • Adheres to ceramic, metal
  • Tack free 15-20 min
  • Application temp +5°C to +35°C
  • Smooth paste consistency

Carpentry

Seal Interior Door Frames

Seal gaps around interior window and door frames to prevent draughts and improve the thermal envelope.

Provides a flexible, paintable seal accommodating minor frame movement, preventing cracks and improving interior comfort.

  • Dynamic movement +/- 5%
  • Tack free 15-20 minutes
  • Adheres to wood, metal
  • Application +5°C to +35°C

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