Pyrotek Wavebar
4KG 1.38 X 5M
$242.25
Sale price
$242.25
Regular price
$255.00
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Pyrotek Wavebar
$242.25
Sale price
$242.25
Regular price
$255.00
GST inclusive
Dispatch: Most orders are processed the same day. Metro delivery: Usually 1–3 business days. We do our best to get most items out on the next business day.
Australia-wide freight · Local pickup from Epping, VIC by arrangement. Ordering from the outback? Get in touch about deliveries to remote locations · Shipping details
Pyrotek Wavebar is a flexible mass loaded vinyl noise barrier for walls, ceilings, floors and pipework. Black, tear resistant, and built to be laid into a construction rather than seen.
The coincidence dip, in plain terms
Stiff light panels like plasterboard, plywood and hollow core walls have a frequency at which they go transparent to sound. It is a property of the panel, and no amount of extra plasterboard of the same type fixes it, because you just move the problem. Adding a dense limp mass layer shifts that dip to a frequency where it matters less. That is what Wavebar is for, and it is why a wall that already sounds solid can still leak a specific range of noise.
The numbers
4 kg/m² at 2.0 mm gives Rw 25 and STC 26. 8 kg/m² at 4.0 mm gives Rw 31 and STC 31. Transmission loss at 500 Hz is 20.6 dB and 26.0 dB respectively, rising to 30.4 and 35.9 dB at 2000 Hz.
Typical targets
Mechanical plant, engine noise, home theatre and audio rooms. Rolls are 1380 mm wide in 5 m lengths, with 10 m also made.
Practical notes
Resists most chemicals, solvents and petrol, and it is weather and UV resistant, which the foil faced grades are not. Operating range -40 to 100 °C continuous. Cuts with a knife and works around pipes, ducts and cables, and hangs in lengths up to 5 m. Supplied untrimmed, so a surface covering may overhang the usable width. Free from lead and bitumen.
Full figures are in the table below.
Technical data
Pyrotek technical data sheet (PDF)Sizes stocked
| Surface weight | Thickness | Width | Roll length | Roll weight |
|---|---|---|---|---|
| 4 kg/m² | 2.0 mm | 1380 mm | 5 m (10 m also made) | 28 to 56 kg |
| 8 kg/m² | 4.0 mm | 1380 mm | 5 m | 56 kg |
Acoustic performance
| Rw, 4 kg/m² | 25 |
|---|---|
| STC, 4 kg/m² | 26 |
| Rw, 8 kg/m² | 31 |
| STC, 8 kg/m² | 31 |
| Transmission loss at 500 Hz, 4 kg/m² | 20.6 dB |
| Transmission loss at 500 Hz, 8 kg/m² | 26.0 dB |
| Transmission loss at 2000 Hz, 4 kg/m² | 30.4 dB |
| Transmission loss at 2000 Hz, 8 kg/m² | 35.9 dB |
| Ceiling sound transmission test | 48 for 4 kg/m², 50 for 8 kg/m² (AMA-1-II-1967) |
Tested to ISO 15186-1:2003 and ISO 10140-4:2010 at the University of Canterbury, New Zealand. Doubling the weight buys you about 6 points of Rw, which is the usual mass law trade-off between cost, thickness and result.
Why it works
| Problem it solves | Stiff light panels such as plasterboard, plywood and hollow core walls have a coincidence dip where sound passes straight through |
|---|---|
| How | The dense limp mass layer shifts that dip to a frequency where it matters less, so the wall keeps its rating |
| Typical targets | Mechanical plant, engine noise, home theatre and audio |
Fire and material
| Fire hazard properties | Group 3 (AS 3837 / ISO 5660-1) |
|---|---|
| Automotive flammability | Complies with FMVSS-302 for motor vehicle occupant compartments |
| Plastics flammability | UL94 HBF |
| Colour | Black |
| Operating temperature | -40 to 100 °C continuous, -40 to 120 °C intermittent |
| Chemical resistance | Resists most chemicals, solvents and petrol |
| Composition | Free from lead, odour producing oils and bitumen |
| Weathering | Resistant to weather and UV |
Group 3 means it is not a finished exposed lining in every situation. Check the NCC group number requirement for the space before you leave it on show.
Handling
| Cutting | Cuts with a knife and works around pipes, ducts and cables |
|---|---|
| Suspending | Tear resistant with high tensile strength, can hang in lengths up to 5 m |
| Tolerances | Length -0/+50 mm, width -0/+5 mm, thickness plus or minus 0.5 mm |
| Supply | Supplied untrimmed, so a surface covering may overhang the usable width |
Fitting notes
Goes inside the cavity or over the framing before the lining, so it becomes the limp mass layer the wall is missing. Lap and seal the joints, because sound finds any gap you leave, and seal around power points and ducts the same way. Keep it decoupled from the frame where you can, since a barrier screwed hard to a stud short circuits some of what you paid for. Rolls are heavy, so plan the lift.
Figures are taken from the Pyrotek technical data sheet for Wavebar, document 311IP, February 2026 edition. The full manufacturer document is linked above. Pyrotek can change specifications without notice, so check the current sheet before specifying on a job.
Common questions
What sizes are stocked and how much does each one cover?
2 options are stocked, running from 4 kg/m² to 8 kg/m². The table above lists each one with the coverage or quantity you get.
How does it perform in a fire?
Fire hazard properties: Group 3 (AS 3837 / ISO 5660-1).
What acoustic performance can I expect?
Ceiling sound transmission test: 48 for 4 kg/m², 50 for 8 kg/m² (AMA-1-II-1967).
What is it made of?
Composition: Free from lead, odour producing oils and bitumen.
How is it installed?
Goes inside the cavity or over the framing before the lining, so it becomes the limp mass layer the wall is missing. Lap and seal the joints, because sound finds any gap you leave, and seal around power points and ducts the same way. Keep it decoupled from the frame where you can, since a barrier screwed hard to a stud short circuits some of what you paid for. Rolls are heavy, so plan the lift.
Cannot see your question? Ask our team and we will get you an answer.
Figures are taken from the Pyrotek technical data sheet for Wavebar, document 311IP, February 2026 edition. The full manufacturer document is linked above. Pyrotek can change specifications without notice, so check the current sheet before specifying on a job.
