Material Definition of Reinforcement Patch

High-density patch is a kind of non-metallic material which is pasted on the inner surface of sheet metal of vehicle body or parts after heat curing, and strengthens the outer panel locally, reduces vibration and noise. The reinforcing sheet is composed of a covering layer (fiberglass cloth, etc.) and a bonding layer (epoxy resin as the main rubber), which is bonded to centrifugal paper.