UV and moisture blocking, transparent protective coatings are the two unique combination characteristics of SC7090-UVB and SC7130-UVB that are not found in any other sprayable, brushable coatings. While SC7130-UVB was engineered primarily for the clear protection of plastics, woods and paints from discoloration, it is also a known transparent protective coating for metal surfaces from staining and corrosion from acid rain and other heat and moisture related degradation processes. Bed wood finishing is not something that you can do then just forget it. Regular repair of damage and failures is essential for satisfactory long term results.
An experimental UVA based on a high extinction and red-shifted absorbance chromophore (shifted toward longer UV wavelengths) shows better wood color protection than currently used benzotriazole UVAs. Do not get hung up on the number of coats, let the wood tell you when it has reached its maximum saturation. Solid colored stains are a good choice for outdoor furniture, deck rails and posts, fences, and cedar siding, shakes, and shingles. The advantage they offer is they are easier to apply and recoat than paint and because they are not as thick they allow some of the natural texture of the wood to show.
Against these damages wood may be effectively protected with combination of construction and surface protection. Western Red Cedar is classified as a durable wood species, dimensionally stable, and suitable for a wide variety of coatings and finishes. Best practices include using kiln-dried wood and coating every exposed surface of the board. This procedure will greatly increase the coatings performance but will not detract from a smooth finish. I have been thinking about using Waterlox marine sealer and finish on my outdoor cedar furniture which are two different products in conjunction with one another.
Combined with a properly maintained exterior wood finish, these species will look great and last a long time outdoors. Oil finishes don’t provide a protective film that sits on top of the wood like varnish does. But even the best ones need a routine reapplication just as often as film-formers, and do little to guard the wood surface from dirt and wear. After wood filler has dried check to see that all surfaces have an even coat where most of the wood grain is filled and evenly coated with the wood filler. You actually hit on two weak points in my knowledge-base: paint and pressure treated wood.
So, unless your idea of a good time is applying another coat of stain, think about using a longer-lasting 100% acrylic coating when your wood deck starts sending out distress signals. Because of that, kiln-dried wood reacts to weather conditions in a more consistent manner, and takes finishes more evenly. Because teak wood is decay resistant, it’s a popular choice for outdoor furniture and boat decks and trim. It is these characteristics that make Western Red Cedar suitable for exterior use for many outdoor applications. Unlike the other finishes discussed in this article, oil finishes do not form a protective layer atop the wood.
Watch for imperfections and rough spots that may appear as you move through the wood layers. I followed the power sanding with quite a bit of sanding in the direction of the wood grain with a hand sanding block, starting with medium grit to match the sandpaper in the orbital sander, and then working my way down to fine. To protect the wood from damage caused by various weather factors, wide variety of paints are available. Japan Wood Protection Association certified (A-5294) colorless wood protectant for surface coating.
An epoxy sealer with exterior varnish topcoats is the most durable, but also the most labor-intensive finish you can apply to outdoor furniture. The water stream pounds the wood fibers into uneven grooves, leaving the surface clean but rough. I prefer spreading a thin layer of thick CA glue over the wood surface with an old credit card or playing card (using a fan for ventilation), spraying accelerator , and then sanding the surface flat with 200 – 300 grit sandpaper.
If you want to avoid surface checking and splinters, you will need to put some kind of water repellent over any outdoor wood and in this sense paint is actually one form of a water repellent. I thought about a dark brown stain for everything but I’m hesitant to stain my new redwood fence with any stain that is going to take away from the beautiful natural wood look.