Shrink-wrapping is a process where a closed bag is formed around the product, typically using a

To waterproof, simply find an old plastic container that will go over the front and back parts and use silicon sealent to fix them onto the double sided PCB.

The application of nano SiO 2 in polymer such as plastics, rubber, fiber, coating, and so on as well as its modifying mechanism for polymer materials were reviewed.