






Car Builders Waterproof Carpet Underlay – Stage 2, 10 mm Peel & Stick (1.71 m²)
SKU: WU-CB
- Universal: cut to suit any vehicle
- Fit it under new moulded flooring for a quieter, cooler cabin
- Questions? Call 07 3340 4392
Why it's worth it
Built for Australian conditions
Works in layers
Deadener on the bare metal, then insulation or underlay, then your carpet or vinyl. Each layer does a different job.
Less heat and road noise
Stops panels drumming and cuts the heat and noise that come up through the floor, firewall and doors.
Easy DIY install
Cut to shape with scissors or a knife. Clean the panel, peel, stick and roll it down firmly.
About this product
Underlay that's made for wet floors. Car Builders Waterproof Carpet Underlay is a 10 mm closed-cell foam that simply can't hold water. Old-style felt and cotton underlay soaks up every river crossing, wet boot and hose-out, then sits there smelling and rusting your floor. This won't.
It also works as a heat and noise barrier, so it's the ideal Stage 2 layer between Stage 1 sound deadener and a replacement moulded carpet or vinyl floor in a work ute or 4WD.
Why You'll Like It
- Closed-cell and waterproof. Won't stay damp, rot, smell or grow mould.
- Cooler cabin. Helps cut radiant heat from the exhaust and transmission tunnel coming through the floor.
- Quieter ride. Absorbs road and wind noise and softens the feel underfoot.
- Peel and stick. Self-adhesive backing holds it in place while you fit carpet over the top.
- Light and easy to cut. Trims with scissors or a sharp knife.
Where to Use It
Under carpet and vinyl floors, in cargo areas, on firewalls, inside doors and quarter panels, and on roof skins. Ideal for 4WDs, utes, convertibles and work vehicles that see water.
Specifications
| Brand | Car Builders |
|---|---|
| Part number | WU |
| Contents | 1 sheet per box, 1800 x 950 mm (1.71 m²) |
| Thickness | 10 mm |
| Weight | Approx. 0.55 kg per m² |
| Material | Closed-cell foam with self-adhesive backing |
| Adhesive temperature range | -40°C to +110°C long term, +135°C short term |
| Flame retardant | Yes (B2) |
Install Tips
- Clean the surface with wax and grease remover before you stick it down.
- The foam doesn't stretch, so make relief cuts around humps, seat mounts and body bolts rather than pulling it to shape.
- Template awkward areas with paper or cardboard first, and tape joins with aluminium foil tape for a neat finish.
Complete the Job
- Stage 1 Sound Deadener (Black): goes on the bare metal first to stop panel vibration
- Sound Deadener Install Kit (Black): roller, knife and foil tape for neat joins
- Heavy-Duty Trim Scissors: clean cuts through thick foam
Not sure how much you need for your vehicle? Call the No Bull team on 07 3340 4392 and we'll work it out with you.
Need it for another vehicle?
Find everything we make for your other ute, wagon or the family car.