1, self-adhesive uses polyester film or polypropylene film as the base material, and the material itself has high waterproof performance. It has good water resistance and can prevent moisture from invading the back of the sticker, thus protecting the adhesive on the back from moisture.

2. The adhesive used in the adhesive is also one of the key factors of waterproof. The adhesive is an adhesive with high water resistance and adhesion, such as an acrylic adhesive. This adhesive can effectively prevent moisture from penetrating and keep the sticker firmly attached to the object.