Oils, penetrating wood finishes

Oils. A number of oils (linseed, tung, oiticica) and modified oils have traditionally been used as penetrating wood finishes. These oils do not leave a film, and they do not last longer than 1-1.5 years because of their low resistance to UV light and water. Therefore, penetrating oils find limited use as outdoor finishes, but they are widely used as interior furniture finishes. 

Penetrating finish n. A low-viscosity oil or varnish which penetrates wood, leaving a very thin film at the surface. 

Handbook of chemistry and physics, 52nd edn. Weast RC (ed). The Chemical Rubber, Boca Raton, FL) Penetrating Finish n A low-viscosity oil or varnish which penetrates wood, leaving a very thin film at the surface. 

Most stains used for finishing shingles and other nalural wood exlerior products are made with pigmented linseed oil. diluted with hytlrocarhon solvents for penetration. 

The PEG is not fixed or cured in the wood, and it leaches out if the wood contacts water. For this reason, PEG-treated wood usually is finished with a penetrating oil or polyurethane varnish. PEG is used primarily to treat cross-sections of trees for plaques, clock faces, and tabletops. It also is used to stabilize bowls and other turnings, carvings, and rifle stocks, and to treat archaeological water-logged wood. 

Solid-Color Stains, Solid-color stains are opaque finishes (also called hiding, heavy-bodied, and opaque stains) that come in a wide range of colors and are made with a much higher concentration of pigment than the semitransparent penetrating stains. As a result, solid-color stains totally obscure the natural wood color and grain. Oil-based or alkyd solid-color stains form a film much like paint, and consequently they can peel from the substrate. Latex-based solid-color stains are also available and likewise form a film. Both oil-based and latex-based solid-color stains are similar to thinned paints and can usually be applied over old paint or semitransparent stains. 

Penetrating Finishes. Penetrating finishes, which do not form a film over the wood, include oils, water repellents, stains, preservatives, and surface treatments. 

Floor sealer n. Composition of resins, with or without oils, in a solvent designed to penetrate the wood rather than produce a surface finish. 

Waterproofs treated or untreated wood while penetrating oils bring out the natural wood grain finish. Prevents swelling, cracking and warping. 

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