Will hole-punched plastic postcards still be waterproof?

Yes. Punching a hole in a plastic postcard does not affect its waterproof properties. The material is waterproof throughout, not just on the surface, so the piece stays fully waterproof even with a hole added.

• Why it holds up: the plastic stock is solid and non-absorbent, so an opening does not let water wick in.
• Common uses: hang tags, key rings, and loyalty pieces that need to survive handling and moisture.
• Add the hole in your order: specify the hole size and placement when you configure the piece.