Specialist service · Melbourne-wide
Soundproof Caulking in Melbourne
Seal the gaps. Stop the noise. Gapless installs acoustic sealant — soundproof caulking — to wall junctions, perimeters and penetrations in apartments, offices, studios and hotels across Melbourne. It's detail work: sound finds every gap the installer missed, and with over 10 years' experience, we don't miss them.
Why sound leaks through walls — and how caulking stops it
A wall built for sound separation only performs if it's airtight. Sound travels through air, so every unsealed junction — wall-to-floor, wall-to-ceiling, around power points and pipe penetrations — is a leak. Acoustic caulking closes those paths with a dense, permanently flexible sealant that moves with the building instead of cracking. It's the cheapest part of a soundproof wall, and the part most often done badly.
Stops sound transfer cold
Perimeter and junction sealing that closes the air paths sound leaks through.
Stays flexible for good
Acoustic sealants don't harden and crack like standard fillers — the seal keeps working as the building moves.
Neat finish, no mess
Clean tooled lines ready for paint and finishing trades. We leave the site the way your builder wants it.
Where we install acoustic caulking
- Apartment party walls and inter-tenancy junctions
- Office fit-outs: meeting rooms, boardrooms, consulting suites
- Hotels, studios and home theatres
- Wall perimeters: floor, ceiling and head-of-wall junctions
- Electrical boxes, pipes and service penetrations
- Combined acoustic + fire rated details (see fire rated caulking)
- More detail: why soundproof walls fail without acoustic caulking
Acoustic caulking — frequently asked questions
What is acoustic caulking?
Acoustic caulking is the sealing of gaps at wall perimeters, junctions and service penetrations with a flexible acoustic sealant. Sound travels through any air gap — even a small unsealed junction lets noise leak between rooms. Acoustic sealant stays flexible permanently so the seal doesn't crack as the building moves.
Where is acoustic sealant applied?
At the perimeter of walls (floor, ceiling and wall junctions), around electrical boxes and service penetrations, at the head of wall, and along any joint in a wall built for sound separation — apartment party walls, office meeting rooms, studios, hotel rooms and consulting rooms.
What's the difference between acoustic sealant and normal caulk?
Acoustic sealants are designed to remain permanently flexible and dense, so they keep blocking sound as the building moves. Standard gap fillers can harden and crack, opening hairline gaps that leak noise again.
How much does acoustic caulking cost?
It depends on lineal metres of joint, access, and the sealant specified. Send us the job details through the quote form and we'll price it free of charge.
Do you do small acoustic jobs, like one apartment or a home studio?
Yes. We do all jobs — from a single room to full apartment buildings. Booking is typically 1–2 weeks' notice.