To use plywood outdoors, seal it by applying multiple thin layers of polyurethane varnish, epoxy sealant, spray-on latex, waterproof paint, or drying oils like Thompson’s WaterSeal.

Can you waterproof plywood for outdoor use?

Can You Waterproof Plywood? Plywood is very receptive to waterproofing material. The smooth finish is still porous enough on a micro level that the plywood will easily bond with sealers and paints. This means plywood can still be used outdoors and in marine environments.

What can you put on plywood to make it waterproof?

Plywood can be waterproofed with paint, polyurethane, or epoxy finish. Lightly sand the plywood with 180 grit sandpaper, clean off any sawdust, and apply the finish with a brush or by pouring the finish on if using epoxy.

How do you protect plywood from water damage?

Liquid Latex

Spray – on or paint – on Latex is another effective plywood protector. It’s available at hardware stores and forms a waterproof layer on the surface of the plywood to protect it from moisture. Liquid Latex products are easy to apply and relatively inexpensive.

How do you protect the surface of plywood?

Many types of waterproofing are available to protect plywood. The most common type sold in home improvement stores is the paint-on or spray-on type of waterproofing. These typically are liquid latex substances applied to the surface of the plywood while wet. Once they dry, they form a plastic, protective layer.

Can plywood be stored outside?

Exterior-rated materials (exterior plywood, OSB, etc.) can be safely stored outside, but they should be covered – remember that most exterior-grade materials are rated for intermittent moisture exposure, not constant direct wetting.

How long will painted plywood last outside?

around 35 years

Plywood is characterized by great durability, but how long exactly a plywood will last outside depends on several factors. Usually, the average life expectancy of exterior plywood constructions is around 35 years if everything is finished properly, but sometimes it can also reach up to 50 years.

Is there waterproof plywood?

Exterior plywood is weather (and water) resistant, so it’s strong enough to be used outside and also in areas that are exposed to water and humidity, like a garage. This type of plywood, often made from Douglas fir, is made stronger by adhering its layers with a waterproof glue.

Can you use PVA to seal plywood?

It can be used to seal ply (i have just done the rear faces of my new ply bathroom floor with it), and it can be used as a primer to give added adhesion. You could be fooled for thinking that SBR is PVA, but is it not, it goes on the same way, and dries pretty quickly.

How do you seal outdoor plywood edges?

3 Common Technique For Outdoor Plywood Sealing.

  1. Polyurethane Varnish. One of the best methods to seal plywood edges outside is by applying exterior polyurethane varnish. …
  2. Water-Based Stain. Cover the entire surface of the plywood with a coat of any exterior water-based stain. …
  3. Water Seal.

What is the best way to seal the edges of plywood?

Quote from the video:
Quote from Youtube video: The solution is to fill the edges. But instead of reaching for wood filler try spackle spackle goes on quickly and is easy to smooth out with a putty knife. Plus spackle dries fast.

What do you seal plywood edges with?

Epoxy sealant is a very popular choice to consider, one that works well for plywood surfaces and edges. It allows the wood to retain its natural color while also providing a hard, durable, and protective layer that will guard against moisture, UV rays, and more.

Does paint seal plywood?

Painting plywood for outdoor use

When painting plywood projects which will be left outdoors, it is important to apply a minimum of three heavy coats, which seal the wood entirely. As an alternative, you could apply two coats of paint, over two coats of primer. Either way, the idea is to fully seal the plywood.

Do you have to seal plywood?

Plywood is a durable material for projects, but it is necessary to seal plywood to protect it against water damage and rotting, and to ensure a long-lasting finish. Once it is sealed, you may finish your project with paint or polyurethane.

Can you paint directly onto plywood?

For plywood projects, water-based acrylic-latex paints are generally the easiest to work with. Epoxy paints also offer great durability. Opt for high-quality paint and apply with a quality brush for the best possible results. Wet the brush before painting, and apply in the direction of the top grain.

How do you seal and paint plywood?

The Best Ways to Paint and Seal Plywood

  1. Sand your plywood surface, removing any rough spots. …
  2. Apply the first coat of primer. …
  3. Sand the primed plywood with 320 grit sandpaper to remove any areas that may have raised while painting the primer. …
  4. Paint a second Primer coat onto the project as in Step 2 above.

Can you varnish plywood?

Polyurethane varnish is probably one of the most common finishes applied to projects made out of plywood, especially furniture projects made out of hardwood plywood. Polyurethane is easy to work with and gives an excellent finish, even with minimal skill.

How do you apply polyurethane to plywood?

Quote from the video:
Quote from Youtube video: Use a high-quality synthetic brush and always apply the polyurethane in the direction of the grain. Working gently to avoid air bubbles apply the poly urethane.