Polyurethane is a tough, water-resistant finish that protects plywood against stains and abrasions. It can be used on indoor and outdoor projects, including floors and furniture. Polyurethane can also be mixed with a wood stain to change the color of the plywood without hiding the natural grain. Polyurethane comes in both oil-based and water-based variants. Generally, water based polyurethane is safer for the wood finisher and the environment than oil-based.Read more :https://polyurethaneroofcoating.co.uk

The main difference between the two is the color – a well engineered water based polyurethane will be clear and will not yellow over time, while oil based polyurethane will have a yellow tint to it that will intensify over time. Water based polyurethane also tends to dry faster than oil based urethane, which is useful for quick projects.

Polyurethane vs. Other Plywood Finishes: Pros and Cons

Both products have their advantages, but the choice really depends on what type of finish you want to achieve. If you are going for a clear look, you will probably go with a water-based product like Varathane Spar Urethane or Rust-Oleum PolyCrylic. Water based products can be applied by brush or sprayer, and are easy on the equipment. They also typically have a lower solvent content, which extends the “pot life” and helps to reduce chemical waste.

Oil-based products (like ZAR Interior Oil Base Poly) are more user friendly than water based, but require more time to dry between coats. They are also a little more prone to absorbing heat and chemicals than their water-based counterparts, which can lead to failure over time. They also release more VOCs into the air, which can be harmful to the wood finisher and the environment.