Water or any other liquid solution can be tough on plywood. If the wooden surface is not protected properly, it can end up in swelling, warping or even damage due to moisture retention. The best way to prevent water penetration is by using effective waterproofing products.
Plywood is used in different situations and hence gets exposed to water in a different way. For example, some plywood is in constant contact with water, while others occasionally come in contact with water. Hence, it is important to choose the right waterproofing solution for your needs.
This blog will help you understand 10 unique waterproofing solutions for plywood.
10 Different Materials to Waterproof a Plywood
Latex Paint
Latex paint is one of the commonly used waterproofing methods for painting plywood with water-resistant paints. While it is not a durable option, the latex paint creates a protective coating that assists in blocking moisture from entering the wood. There are both types of latex paints, indoor and outdoor.
This ensures you choose the right variety that matches your project while maintaining and enhancing the natural grain and look of wood. Latex paint has exclusive features like drying quickly, UV resistance, easy-to-use features and protection from termites. Most importantly, it is valued for its flexible nature.
Glue Sealant
It is another reliable method of waterproofing plywood with the help of applying a Type-A waterproof glue sealant. It is one of the expensive alternatives. Glue sealant is commonly found in marine-grade and heavy-duty plywood, as it is a standard choice, and many trusted suppliers already use this method. Type-A glue sealant has specially formulated adhesive properties designed to stick securely to wood and its composites. Hence, it is one of the effective choices. It also gives durable waterproofing solutions as it consists of deep-sealing ability and heavy-duty performance.
This provides excellent long-term protection from future damage once the sealant is applied properly to make the plywood waterproof. The glue seeps down into the plywood pores to form a strong moisture-resistant barrier and prevent water intrusion.
Wood Oils
Wood oil is considered an excellent waterproofing option for indoor projects, mainly. These oils are extracted from plants and nuts, which further penetrate into the plywood fibres. This creates a protective water-resistant layer and refines its natural appearance. These wood oils nourish the plywood from within and create a perfect space for restoration and repair work.
There are popular wood oil options like linseed oil or tung oil, which are widely used to retain the wood’s look and protect against moisture damage and decay over time. It is not suggested to use wood oils on outdoor projects that are exposed to heavy rain.
Polyurethane
It has a tough and durable finish that stops both abrasion and moisture and provides a reliable protective coating for wood. Polyurethane solution can be mixed with stains to form different shades. It is also layered with several coatings to create a water-resistant surface while still maintaining the natural wood grain.
One of the major perks is that it remains slightly flexible after uring, which allows the wood to move during changes in temperature settings without cracking. The oil-based polyurethane has one drawback: it appears yellow over time, mainly when exposed to sunlight. Hence, it is important to keep this point in mind while choosing the right solution for preserving its original colour.
Epoxy
Epoxy is a thermosetting resin which is mixed with a hardener to make an extremely strong, durable and water-resistant solution. It becomes hard to break it down. Epoxy offers an exceptionally tough bond and shows high resistance to water, other chemicals, heat and even UV exposure.
Epoxy can be effectively used as an adhesive or as a sealant to provide utmost safety and strength. In a few cases, it can be used as a reliable substitute for old wood glue.
Rubber-Like Sealants
This is commonly used to seal the roofs and RV tops as it is one of the most durable and effective waterproofing materials. It is thicker and expensive than other alternatives, but the benefits you get after using it are worth the price. One of the best features of rubber sealant is its flexibility, which makes it ideal for fixing uneven or oddly shaped surfaces.
There are different brands of rubber sealants, like Flex Seal or Liquid, with slightly different features. Nonetheless, all of them fulfil the main core motive of blocking the water entrance. Waterproofing products of these brands make a waterproof barrier which ensures long-lasting protection for the project.
Varnish
Using varnish for plywood is an effective way of waterproofing the surface and preventing the edges from getting damaged. It creates a durable and moisture-resistant layer that improves the strength and offers a smooth look with a glossy touch. Exterior wood varnishes are created to function in every kind of weather condition and to reduce the chances of peeling and cracking. Whether you use varnish for plywood, boats or decking, it works effectively and offers durability with aesthetic appeal on all kinds of surfaces.
Water-Based Paint
This material is created for exterior use to protect, seal and waterproof the plywood while adding an aesthetic appeal with a colour of your choice. It protects from weather damage and is suitable for both indoor and outdoor projects. However, it is crucial to occasionally sand it and do touch-ups to maintain its freshness for a longer period. Water-based painting mainly works for outdoor areas like sheds, fences and landscaping projects where protection, proper functioning and aesthetics are all important.
PVA Glue (Polyvinyl Acetate)
PVA glue is another reliable wood adhesive as well as one of the most cost-effective waterproofing solutions for plywood. It has various features like easy application, quick drying, and gives a smooth finish. PVA glue is used by dissolving it in water before actual use. PVA glue can also be used as a primer before painting a surface. It is a non-toxic, non-harmful fume that can be used indoors for fixing plywood furniture, shelves or wall panels.
Liquid Latex
Liquid latex is easy to use and fast to apply, as it comes in wood stain liquid as well as spray form. It is relatively expensive but offers excellent bonding features with plywood. It is a versatile option to seal different kinds of wood surfaces. Liquid latex can be used to protect interior areas like bathroom wood or exterior areas like decks, sheds, boats and other materials exposed to bad conditions. It is considered one of the durable waterproofing materials.
Seal Your Plywood Correctly!
It is important to choose the right product to ensure waterproofing is done effectively. Plywood is not naturally waterproof, but it can be protected and remain fresh against water, chemicals and weather conditions.
It is crucial to regularly seal, maintain and take good care of plywood to keep it waterproof and well-functioning for the long run.
