







Car Builders Premium Under Bonnet Insulation – Peel & Stick, 5.5 mm
SKU: choose your options
- Universal: cut to suit the underside of any bonnet
- 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
A factory-look bonnet pad for any vehicle. Car Builders Premium Under Bonnet Insulation is a 5.5 mm, 100% black polyester-fibre pad with a self-adhesive back. It shields your bonnet paint from engine heat, takes the edge off engine noise in the cabin, and lays down wrinkle-free over even complex bonnet bracing.
It's the go-to fix when the original pad is sagging, crumbling or missing altogether, and for restorations that never had one.
Why You'll Like It
- Heat protection. Rated to 207°C (405°F) to protect bonnet paint from engine heat.
- Quieter cabin. Absorbs engine noise before it reaches you.
- Clean, OEM-style finish. 100% black and wrinkle-free once rolled down.
- Tough. Holds together even under a high-pressure washer.
- Fire safe. Flame retardant to MVSS 302 and won't ignite.
- Universal. Cut it to any bonnet: cover the whole underside or fill between the braces.
Which Size?
- Standard (1500 x 1000 mm): most cars, utes and smaller 4WD bonnets.
- Extra Large (1800 x 1310 mm): wide 4WD, Troopy, Patrol, US pickup and van bonnets, or when you want to wrap the front lip as well.
Measure the underside of your bonnet and allow an extra 5–10 cm each way to follow the contours.
Specifications
| Brand | Car Builders |
|---|---|
| Part numbers | PUBIN (Standard), PUBINXL (Extra Large) |
| Sheet size | Standard 1500 x 1000 mm; Extra Large 1800 x 1310 mm |
| Thickness | 5.5 mm |
| Material | Needle-punched polyester fibre, self-adhesive backing |
| Colour | 100% black |
| Temperature resistance | 207°C (405°F) |
| Flame retardant | Yes, meets MVSS 302 |
Install Tips
- Clean the bonnet underside with wax and grease remover so it's free of residue.
- Start in the centre: peel back only the middle section of backing, stick it down, then work outwards.
- Roll it down as you go and feed the material into hollows rather than stretching it.
- Trim the edges last with a sharp blade, taking care not to cut into the paint. Prick any trapped air bubble and roll it flat.
Complete the Job
- Sound Deadener Install Kit (Black): the roller and knife make this a much easier job
- Heavy-Duty Trim Scissors: rough-cut the sheet to size before you start
- Stage 1 Sound Deadener: quieten the doors and floor while you're at it
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.