How To Waterproof Wood
Learn how to waterproof wood for outdoor furniture to withstand what Mother Nature throws at it with this step-by-step tutorial on how to refinish and seal wood so it lasts.
Yield: 1 wood piece
Cost: $50-200
Equipment
- Paint Brush
- Drop Cloths
- Paint Sprayer Optional
Materials
- Sandpaper 220 and 100-120 grit
- Painter's Tape To tape any areas you don't want covered
- Paint trays or buckets
Instructions
- Do any repairs as necessary and then remove any previous finish. This can be a light sanding or a full strip depending on the condition of your surface. For best protection, new and wet wood should be at least as low as 15% when read with a moisture meter.
- Staining is optional but may offer additional UV protection. Brush in one direction from end to end. Let it soak into the surface but wipe off excess with a cotton cloth after 5 minutes or per manufacturer's instructions. Reapply to any spots or a second coat until you have the desired color.
- Apply sealer with a brush or sprayer. I like a synthetic brush for most sealers and a natural bristle brush for oils. Brush in one direction from end to end. Do Not back-brush if the product is drying.
- Apply 2-3 coats for best coverage. Allow the piece to fully cure before setting items on it such as heavy lamps or other painted materials.
Notes
Tips for a Applying
- Completely stir the poly before use and occasionally during application to keep the ingredients in suspension. Be careful not to incorporate bubbles while stirring.
- Remember that most sealers will deepen (not necessarily darken) the color of any previous stain or paint.
- It is generally not necessary to sand between coats, unless you have imperfections which can be sanded out.
- As with any project, do not use in high (>80%) or very low humidity.
- Avoid direct sunlight when applying.