Acouslime 4-in-1 EXTRA is the adhesive we use and sell for glue-down installations of engineered timber flooring. It is a ready-to-use, high-elastic-strength timber flooring adhesive based on Silyl Modified Polymer (SMP), with a built-in moisture vapour barrier, an acoustic rating that can remove the need for separate acoustic matting and double-gluing, and no solvents or isocyanates. One product does the job of four: adhesive, moisture barrier, acoustic layer and filler, applied in a single step.

Key features

• Ready to use: no mixing, straight from the bucket
• Moisture vapour barrier: built in, for glue-down over concrete
• Acoustically rated: can eliminate the need for acoustic rubber matting and double gluing
• Solvent and isocyanate free, low VOC
• Suitable for subfloor heating
• High filling capacity: no added fillers, rapid grab

Which Acouslime do I need?

Choose 4-in-1 EXTRA where acoustic performance matters: apartments, upper floors and anywhere a body-corporate or building standard sets a noise requirement. See Acouslime 3-in-1 EXTRA. Coverage depends on the trowel and subfloor; our team can confirm how many buckets your floor needs when you order, and adhesive is included in a LocalTasker installation quote.

Technical and safety data

The manufacturer's technical data sheet and safety data sheet are available from Acouslime; ask our team if you need a copy for a project.

Frequently asked questions

Do I still need a moisture barrier?

No. The adhesive contains a moisture vapour barrier, which is what makes it suitable for glue-down over concrete.

Can it be used with underfloor heating?

Yes, it has been tested with subfloor heating.

Can I use it for hybrid flooring?

No. Hybrid flooring is a floating click floor and is not glued down.