Automotive Carpet Underlay – Sound & Heat Insulation Padding

Upgrade the comfort and performance of your vehicle’s interior with our Automotive Carpet Underlay, designed to reduce noise, improve thermal insulation, and create a smoother, more professional carpet installation. Placed beneath your main carpet, this padding helps absorb road vibration, minimize heat transfer, and level uneven surfaces for a cleaner, more comfortable finish.

Ideal for classic car restorations, hot rods, trucks, vans, RVs, and custom automotive interiors, this underlay enhances both durability and driving comfort.

If you would like to order a sample of these underlay fabrics, click here. 

Product Details

• Available Weights: 20 oz, 27 oz, 40 oz

• Sold by the yard: 36" × 36" (continuous lengths up to 50 yards)

• Width: 36"

• Choose your preferred weight using the drop-down menu

Why Use Automotive Underlay?

• Reduces road noise and vibration

• Adds thermal insulation for a warmer, quieter ride

• Helps carpet sit smoother and last longer

• Ideal for both restoration and new upholstery work

• Improves overall fit, feel, and finish of automotive carpet

Recommended For

• Classic cars (1950s–present)

• Hot rods & customs

• Trucks, SUVs & vans

• RVs & campers

• Interior rehabilitation & custom builds