Unfinished wood tends to absorb moisture, which leads to deformation and ultimately, rotting. To extend the lifespan of wood, you can use water-repellent products. For instance, tung oil is perfect for treating furniture, floors, and countertops, while sealants and oil-based stains are better suited for outdoor items.
Treating Wood with Oil
Step 1: Choose the Oil
If you want to fully protect wood from water, opt for tung oil or its derivatives. This oil is generally more expensive, so it's often used for small items.
Step 2: Purchase the Oil
Buy tung oil or a variant like "Waterlox," which is particularly popular for kitchen furniture and wooden floors. Tung oil penetrates the wood up to 5 mm deep and soaks into the pores without leaving a surface film.
Step 3: Prepare the Oil
To enhance absorption, it’s recommended to dilute tung oil with turpentine in equal parts. If you are treating a kitchen table, choose formulations that are safe for food contact.
Step 4: Prepare the Wood
Before applying tung oil, it’s crucial to prepare the surface. After oil treatment, all imperfections will become more noticeable as it adds a slight sheen and emphasizes the wood's natural color.
Step 5: Sanding
Sand the wood surface with fine-grit sandpaper (220) to improve oil absorption.
Step 6: Prepare Rags
Fold a lint-free cloth into several layers and have extra rags on hand. This will prevent the cloth from catching on the surface and reduce the risk of rough patches.
- Tung oil is non-toxic, but turpentine is needed for absorption.
Step 7: Apply the Oil
Lightly moisten the rag with oil, and do not pour it directly onto the wood. Rub the oil in, starting from the inner edge and moving outward to avoid touching already absorbed oil.
Step 8: Even Coverage
Try to apply the oil evenly. It’s better to add more oil than to press hard with the rag to avoid puddling.
Step 9: Drying Time
Allow the oil layer to dry for 30 minutes, then wipe the surface with a clean rag to remove excess oil.
Step 10: Let the Wood Rest
Let the wood rest for 24 hours or until fully dry. Tung oil treatment takes longer compared to sealants.
Step 11: Sanding Again
Once the wood is dry, treat it with very fine steel wool (“0000”). If sticky dust appears during sanding, it means the wood hasn’t dried sufficiently.
Step 12: Applying Additional Coats
Apply two more coats of tung oil, repeating the drying and sanding processes in between. For greater effectiveness, it is recommended to apply three coats of diluted tung oil.
Step 13: Drying Time
Before use, the wood should dry for several days to a few weeks. Check its condition by gently running your finger across the surface.
Treating Wood with Sealants
Step 1: Surface Preparation
Before applying sealant, make sure to sand and stain the surface. This will help remove old finishes that may interfere with absorption.
Step 2: Purchase the Sealant
Buy a water-based sealant at a hardware store. This is usually indicated in the product name. You can also choose a tinted sealant and simply sand the surface before application.
- The packaging of the sealant often indicates which surfaces it is suitable for — floors, furniture, fences, or other items.
Step 3: Choose Marine Sealant
If moisture, UV rays, and water resistance are important to you, select a sealant designed for marine use.
Step 4: Read the Instructions
Be sure to read the instructions to find out how to apply the sealant properly and how long it needs to dry.
Step 5: Gather Tools
Acquire a spray gun or paintbrushes for easier application.
Step 6: Apply the Sealant
Evenly apply the sealant using a brush or spray gun. Apply it at suitable temperatures and humidity to avoid rapid evaporation.
Step 7: Drying Time
Drying time is indicated in the instructions. Afterwards, sand the surface with fine sandpaper to improve adhesion for the next coat.
Step 8: Applying Additional Coats
Apply second and third coats. Softwoods may need two to three coats, while hardwoods may only require one.
Step 9: Resting Time
Before using the wood or installing hardware, let it rest for a few days. Periodically, you should re-treat the surface when it starts to darken from water exposure.
Treating Wood with Oil-Based Stains
Step 1: Choose the Stain
Select an oil-based translucent stain. For outdoor items, choose a suitable option, as lighter stains contain more oil.
Step 2: Apply the Stain
Apply the stain to the wood with a brush without prior preparation. Treat the entire surface and then let it dry.
Step 3: Drying Time
Before applying the next coat, the wood should dry for four hours to a day.
Step 4: Sanding
Sand the surface with fine-grit sandpaper, then wipe it with a cloth before applying the next coat.
Step 5: Apply the Second Coat
Similarly, apply the second coat of stain. It will take a bit longer to dry — from one to two days. Do not rush to use the wood until it is fully dry.
- If the surface is not sticky, it means the stain has dried.
Step 6: Final Coat
Apply the final third coat and let it dry for three days.
