Both of these finishing processes are typically used in specialty applications to protect acoustical dampening materials from abrasion, moisture, and debris. Their clean aesthetic is also desirable in some applications.

Heat sealing describes the process of joining two or more thermoplastic films with heat and pressure. Heat sealing is also used to cleanly fuse a synthetic fiber’s edges, such as 3M™ acoustical dampening Thinsulate™ product. Simultaneous sealing and cutting can finish your component in one step.

Cold fusing is similar to heat sealing, but relies on pressure alone to form a seal. This somewhat limited process provides an economical alternative to heat sealing.