Car Sound Deadening Mat, 50 mil 4.8sq.m Car Sound Dampening Material, Butyl Automotive Sound Deadener, Noise Insulation and Vibration Dampening Material for Car

Deadening a whole car gets expensive fast, and on a roof skin or a rear quarter panel there is no need for much mass to stop the metal ringing. Thin butyl covers far more area for the same outlay, which is where a 50 mil pack earns its keep.

Thin sheet, maximum area

This pack runs to 4.8 m² — up to 47 sheets at roughly 36.8 × 25.4 cm each — enough to work through a full interior rather than picking two panels and hoping. At 50 mil, or 1.3 mm, each sheet is thin enough to conform over curved roof pressings and around the swage lines in a door skin, where a 5 mm mat has to be cut into strips before it will sit flat.

Same three-layer build, less bulk

Construction matches the thicker mats in the range: butyl rubber core, heat-resistant aluminium foil face, high-tack adhesive back. Thin butyl still adds mass and still damps vibration; it simply does less per square metre than a heavier sheet, so it favours large flat areas over the worst-offending panels.

Key features

• 50 mil (1.3 mm) butyl: conforms to curves and compound pressings without being cut into strips.
• Up to 4.8 m² per pack: 47 sheets, enough to work through a full interior.
• Foil-faced: heat-resistant aluminium surface over the butyl.
• Peel-and-stick: no separate adhesive; a hand roller, not supplied, helps seat it.

Specifications

• Thickness: 50 mil (1.3 mm)
• Construction: 3-layer — butyl rubber, aluminium foil facing, adhesive backing
• Sheet size: 36.8 × 25.4 cm (14.5 × 10 in)
• Sheets per pack: up to 47
• Total coverage: up to 4.8 m² (52 sq ft)
• Noise reduction (dB): not published in the source data
• Temperature range: not published in the source data

A sensible starting point when there is a lot of area to cover.