How to Waterproof Plywood

Waterproofing plywood is a must for most projects, especially if it’s going to be exposed to moisture. However, you may not want to use standard oil-based finish. Instead, you might choose to use a water-resistant glue instead. But can you waterproof plywood? There are several different ways that you can waterproof plywood so that it doesn’t rot or get wet. In this blog post, we will explore various ways of waterproofing plywood, including with water-resistant glues. We also provide a list of helpful resources at the end of this article.

What is Plywood?

The most important thing to know about plywood is that it’s made from wood. That means it’s susceptible to rot like any other piece of wood. This is a problem when you’re building something and you need it to last a long time. You might want to waterproof plywood because you expect it to be exposed to water, like a deck or a table made of wood. 

Plywood is a type of engineered wood that’s made with thin layers of wood arranged in a criss-cross pattern. These layers are glued together to form a thicker sheet of wood. The benefit of plywood is that it’s more durable than standard wood. Plywood is also much less expensive than other types of wood, such as cedar. This makes plywood ideal for projects that need to last a long time.

Water Resistant Glue For Plywood

For projects that don’t get wet, you might choose to use glue for waterproofing plywood instead of a coating. Waterproof glue is a great option for building decks, furniture, and other projects that stay out of the rain. If you plan on applying a coating on top of the glue, make sure you use a water-resistant glue. You can use either a solvent-based or water-based glue, as long as it’s water-resistant. Glue has one major flaw, however – it’s not very durable. You can only apply it to one surface at a time, and it can chip off over time. That’s why you should only use glue if you don’t plan on exposing your project to a lot of water.

Liquid Rubber Polyurethane Membrane 

A popular method that you can use to waterproof plywood includes using a liquid rubber polyurethane membrane. This product is available online at your favorite marketplaces as well as in some of the most popular home improvement stores. Before you apply this to the plywood you’re trying to waterproof, make sure you clean and sand the wood and use a primer. Next, simply roll or paint this product onto the wood, allowing for 1 hour in between coats for drying and curing time, with an advised 3-5 coats to create a reliable, durable rubber membrane that will protect the wood from water penetration and damage for years to come. 

Epoxy Based Coating for Plywood

An epoxy-based coating is a great option if you need something more durable than glue. This type of coating is made of two substances that are mixed together to create a thick coating. If you choose the right epoxy, you can waterproof plywood quickly and easily. You can apply the coating to the wood before you install it on your project. This way, you don’t have to worry about getting it on the parts that you need. Like glue, you can apply epoxy to both sides of plywood. However, it’s better for the bottom side. That’s because epoxy is thick and makes it difficult to nail into the bottom of plywood.

Marine Epoxy Coating for Plywood

Marine epoxy is an even more durable option than regular epoxy. It’s designed specifically for use in high-moisture environments, such as around the water. Marine epoxy is thicker than regular epoxy, which makes it even easier to apply to both sides of plywood. It’s also easier to sand, since it’s thicker than regular epoxy. Marine epoxy also cures faster than regular epoxy. That means you don’t have to wait as long before you put your piece of wood to use. One drawback of marine epoxy is that it’s more expensive than regular epoxy. However, if you’re looking for something more durable, it’s worth the extra cost.

Spray-on Acrylic Coating for Plywood

Spray-on acrylic is extremely durable, which makes it a great option for projects that will get wet. You can waterproof plywood by applying acrylic with a spray gun. Acrylic is a very thick substance that’s difficult to work with. That’s why you should only use a spray gun to apply the coating. If you try to apply it with a brush or a roller, you’ll end up with a sticky, gloppy mess. Since acrylic is thick, it can be difficult to sand. That means you should use a spray gun to apply it to your plywood. That way, you can make sure the coating is smooth and even on both sides.


Plywood is a great building material when you want to create a project that will last a long time. But it’s important to waterproof plywood before you install it or it will rot. You can do this by applying a water-resistant glue or an epoxy-based coating to the wood. When waterproofing plywood, you have a few different options. You can use water-resistant glue, an epoxy-based coating, marine epoxy, or a spray-on acrylic coating. Perhaps the most efficient and easiest solution is using liquid rubber polyurethane membrane. No matter which option you choose, it’s crucial to waterproof plywood to ensure that it lasts a long time.