Best product to waterproof plywood wall?

[Cranswick]

Hi l have a section of plywood wall near my shower that a want to protect from the steam and water, what is the best waterproofing product to paint over it to protect it, something that is clear or invisible 

[JacobZ]

Hi @Cranswick ranswick,

Thank you for your question on waterproofing a plywood wall.

Plywood in a bathroom can pose challenges due to its susceptibility to moisture. While no treatment can guarantee complete waterproofing, there are measures to enhance its resistance.

A clear varnish such as Cabots Matt Water Based Cabothane Clear Polyurethane Varnish will help to offer some additional protecting, you might like to consider this as an option. 

Remember to ensure there is proper ventilation in the bathroom to reduce humidity levels. This can also help mitigate the risk of water damage to the plywood over time.

Let me know if you have any further questions.

Jacob