Query: How do you waterproof a decal?
Context: 4 Ways to Waterproof Stickers and Decorate Your Water Bottles Method 1: Print on waterproof materials. Method 2: Seal them all in self-adhesive laminating films. Method 3: Use clear-coat sealant. Method 4: Invest in a thermal laminating machine. Best waterproof sticker ideas for water bottles.