Laminate plywood waterproof with fiberglass

In order to get plywood absolutely waterproof, a lamination is necessary, which consists of a glass fiber or carbon fiber with 2-K-Kunstharztränkung. Often the outer skin of boats is treated in this way to create a truly robust hull that can also absorb impacts without the paint peeling. Read here how it works!

What is lamination?

Laminating generally means covering a surface with a protective layer. From this word derives the term "laminate", a material that carries a decorative and then a protective layer over a wood-based material core first.

You need this material for laminating plywood

Choose a high-quality 2-component synthetic resin for impact-resistant coatings. For larger surfaces, we recommend that the material remains workable for a very long time after mixing, preferably about 30 to 40 minutes.

In addition, there are the matching fabric mats made of glass fiber or carbon, for example a glass fiber fabric with a body weave in the quality of 80 gsm. This is adhered with the help of the synthetic resin. Two layers bring a plus in stability.

How To Laminate Your Plywood Correctly: A Quick Start Guide

Now the coating only has to be on the plywood surface! Our short guide will tell you how to do it:

  • Sand the rough surface and clean it thoroughly.
  • Fill in dents and holes with synthetic resin.
  • Coat the substrate with a dilute synthetic resin mixture, as a solvent is usually suitable acetone or a special epoxy thinner.
  • Let the primer dry for at least half an hour.
  • Now put on a fabric strip and dab it with undiluted synthetic resin mixture. Avoid dripping and runners.
  • Apply tissue to tissue, cut individual strips with sharp scissors.
  • If desired, you can apply a second layer of fabric.

Tips & Tricks

Never coat the substrate before laminating plywood, as this will prevent the resin from penetrating the wood. In addition, the filler layer could eventually flake off.

Video Board: Fiberglass and plywood lamination.