NVH Damping Materials: A Practical Selection Guide

By Priya Nair · October 6, 2026

What Is NVH Damping?

Noise, Vibration, and Harshness (NVH) damping reduces unwanted sound and vibration in vehicles and structures. The right material choice depends on frequency range, temperature, and application surface.

Constrained Layer Dampers (CLD)

CLD materials sandwich a viscoelastic layer between two stiff faces. When the structure bends, the viscoelastic core shears and dissipates energy as heat. Best for mid-frequency panel resonance between 100-500 Hz.

Free Layer Dampers (FLD)

A single layer of viscoelastic material applied directly to a vibrating surface. Simpler and lighter than CLD, effective above 500 Hz where extensional strains dominate.

Mass-Loaded Vinyl (MLV)

High-density vinyl sheets that add mass to block sound transmission. Effective as a sound barrier rather than a damper. Typical density: 1-2 lb/ft². Use on floors, firewalls, and door panels.

Butyl Rubber Sheets

Self-adhesive butyl rubber is the most popular automotive damping material. Excellent for door skins, floor pans, and trunk floors. Temperature range: -40°C to +120°C. Apply to 25-50% of panel area for significant improvement.

Closed-Cell Foam

Lightweight foam that absorbs airborne noise and provides thermal insulation. Use as a decoupling layer between panels and trim. Not a structural damper but excellent as a secondary treatment.