Dunlop AAC Block Construction Adhesive 15 kg is a reliable thin bed adhesive for autoclaved aerated concrete blockwork chosen for home repairs, trade work, and craft builds when you want a bond you can trust. Designed for Australian conditions, it balances strength, ease of use, and clean application so you can get professional results without special tools. The 15 kg pack is ideal for general work and keeps neatly in a toolbox or caddy.
Why choose Dunlop AAC for your next project
Everyday jobs often involve mixed materials and imperfect surfaces. Dunlop AAC Block Construction Adhesive 15 kg has been formulated to wet out well, grab quickly, and cure to a tough finish that resists movement and contact stress. It maintains bond integrity across common temperature swings and has dependable resistance to moisture and most household chemicals. Whether you are fixing, building, sealing, or assembling, this product gives you confidence from first squeeze through final set.
Best for
Laying AAC blocks in internal and external walls
Creating straight and plumb courses with minimal waste
Suitable surfaces
The adhesive works well on the following surface types when properly prepared:
AAC blocks and panels
Suitable primed substrates as per system design
Surface preparation
Good preparation is the key to a long lasting repair. Remove loose material, dust, and grease. Wipe glossy areas with methylated spirits or an approved cleaner and allow to dry. On very smooth plastics and metals, lightly roughen with fine abrasive paper to give the adhesive a mechanical key. Dry fit parts first and mark alignment points so you can assemble accurately within the open time. If bonding porous materials, ensure both faces are dry and free of surface chalking.
How to use
Check fit and plan clamping. Do a trial run without adhesive so you know the order of steps.
Apply a thin, continuous bead to one surface. For wide pieces, use a zig zag pattern to maximise wetting.
Bring surfaces together within the stated open time of follow bag guidance for open time and pot life. Reseat once if needed, then hold steady.
Apply even pressure using clamps, tape, weights, or temporary fasteners. Avoid squeezing all adhesive out of the joint.
Allow to cure undisturbed. Initial handling strength will develop as the adhesive sets, with a full cure reached based on the chemistry described below.
Cure profile
Mix to a creamy consistency and apply with a notched trowel. Align blocks within the open time and tap to level. Allow to set before further work.
Temperature and environmental performance
Protect fresh work from rain, frost, and high heat. Avoid application to very cold, sweating, or waterlogged surfaces. For outdoor use protect fresh bonds from rain until the skin has formed and the core has progressed in cure. Once fully cured, the bond resists normal weathering, splash water, and intermittent UV exposure based on the substrate and paint systems used.
Clean up and finishing
Wash tools with water while material is fresh. Remove spills promptly. When cured, excess can be carefully trimmed or sanded. For painted finishes, allow the adhesive to fully cure before priming. Test paint on a small area to confirm compatibility and drying behaviour.
Coverage guide
Coverage varies with bead size, surface porosity, and technique. As a general guide, a 3 mm bead yields approximately 10 to 12 linear meters per 310 mL cartridge. Smaller packs scale proportionally. Gaps, rough edges, and highly absorbent materials will reduce coverage. Plan an extra margin for offcuts and practice passes.
Tips for best results
Work within the recommended open time so the adhesive can properly wet the surfaces.
Use light clamping pressure to keep parts aligned while maintaining a film thickness for strength.
For very porous substrates, apply a thin precoat as a primer layer and allow it to tack before final assembly.
Keep joint lines clean by masking edges with painter tape and removing it before the adhesive skins.
Where movement or vibration is expected, design the joint to share load across a large area.
Troubleshooting
Poor adhesion: Check for oil, release agents, or surface dust. Reclean and lightly abrade if necessary.
Slow cure: Low temperature and low humidity extend cure time. Maintain moderate conditions for best results.
Visible squeeze out: Wipe fresh material with a suitable solvent and a soft cloth. Once cured, trim carefully.
Bond line prints through paint: Allow a full cure, then prime and apply thin coats of paint, allowing proper drying between coats.
Storage and shelf life
Keep dry and use within shelf life. Always check the pack for a lot code and use by guidance. Reseal immediately after use and store upright. Dispose of empty containers responsibly.
Safety
Read the label before use. Wear gloves when handling uncured material. Provide ventilation in enclosed areas. Avoid contact with skin and eyes. Keep out of reach of children and pets. If sensitivity occurs, stop use and seek advice. Do not ingest. First aid directions and detailed handling information are available on the package and the safety data sheet.
Frequently asked questions
Can I bond dissimilar materials? Yes, provided each surface is clean and sound. Differences in expansion are managed by the adhesive film thickness and the inherent flexibility after cure.
Is clamping required? Light clamping improves alignment and final strength. Excessive pressure can starve the joint of adhesive which reduces performance.
Is the bond water resistant? Once cured the bond resists splash water and routine humidity. For permanent immersion choose an adhesive designed for underwater service and follow the manufacturer guidance.
Planning your job
Measure twice and cut once. Dry assemble parts so you can confirm squareness and alignment before adhesive is involved. Keep rags, clamps, and spacers ready. If you are new to the product, test on offcuts to get a feel for bead size and squeeze out. A consistent 1 to 2 mm bond line is a good starting point for most rigid materials. Thicker lines help when surfaces are uneven. Avoid starving the joint by pressing too hard without giving the adhesive a place to reside.
Responsible use
Choose an adhesive that suits the materials and the environment the finished piece will face. If a joint will be submerged, carry structural loads, or be exposed to strong chemicals, check the technical data sheet for specific guidance. Many general purpose products are perfect for day to day work, while specialised tasks call for a system designed and tested for that environment. Using the right product first saves time, money, and rework.
Aftercare and maintenance
Adhesive joints are remarkably strong when used correctly. Design repairs so that routine loads are shared across a generous area. Where heavy vibration is present, pair the adhesive bond with appropriate mechanical fasteners. Keep cleaning chemicals mild, and avoid abrasive pads on visible joints. If a bond will be repainted, choose flexible paint where movement is expected, and keep edges sealed to prevent dirt tracking along the bond line.
Recycling and disposal
Allow empty containers to cure before disposal. Check local council guidance for recycling of plastics and metal cartridges. Never pour uncured product into drains or soil. Wipe tools on scrap material and let residue harden before placing in general waste. Smart handling keeps the workspace clean and reduces environmental impact.
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