Foam liner is a general purpose liner, made of compressible polyethylene foam. These do not create a seal, and is often used for leak prevention.
Form Liner is one-piece liner, the material is EVA, EPE etc.
On its own elastic send contractility and container port.
Suitable for all kinds of container sealing, can use repeatedly, but the seal effect is general.
Can be used after and aluminum-plastic composite membrane composite and the sealing effect is better.
The main features for the clean, dust, do not absorb water vapor, not because of humidity or temperature to change its stability.