---
type: faq
title: "How do I make my custom coasters waterproof?"
description: "Waterproofing a coaster is about building up a sealed barrier in thin, even layers rather than one thick coat. Apply 2 to 3 thin coats of clear polyurethan"
resource: https://www.4over4.com/faqs/general/how-do-i-make-my-custom-coasters-waterproof
tags: ["Branded Merchandise", "faq"]
timestamp: 2026-07-20T18:54:40.856Z
---

# How do I make my custom coasters waterproof?

Waterproofing a coaster is about building up a sealed barrier in thin, even layers rather than one thick coat. Apply 2 to 3 thin coats of clear polyurethan

Part of the **Branded Merchandise** hub. See [all faq concepts](index.md).

- Page type: faq
- Hub: Branded Merchandise
- URL: https://www.4over4.com/faqs/general/how-do-i-make-my-custom-coasters-waterproof