Water-repellent preservatives

Penetrating finishes such as stains and water-repellent preservatives ( 7,8) leave little or no continuous coating on wood surface. Because there is no coating, there is no failure by blistering or peeling. These finishes are ideally suited for rough-textured surfaces difficult to paint effectively. 

The water-repellent preservatives are generally comprised of a resin, a solvent, a wax (as the water-repellent), and a preservative (generally pentachlorophenol) (8). Wood surfaces treated with these finishes are water repellent and mildew and decay resistant. The water-repellent preservatives are excellent natural finishes for wood. 

Forest Products Laboratory, "Wood Finishing Water-Repellent Preservatives," 7 pp., USDA For. Serv. Res. Note FPL-0124, For. Prod. Lab., Madison, Wis., 1973. 

Because of these problems, woodwork exposed to the outdoors should be given a protective treatment that is both water-repellent and water-resistant to decay fungi. Such treatment could be used either as the finish itself or prior to the final finish. Materials developed for such purposes are termed water-repellent preservatives... 

Feist WC and Mraz EA (1978) Wood finishing water repellents and water-repellent preservatives. USDA, Forest Service, Forest Products Laboratory, Research Note FPL-0124... 

Penetrating finishes such as stains and water-repellent preservatives leave little or no continuous coating on wood... 

Natural finish- A transparent finish which does not seriously alter the original color or grain of the natural wood. Natural finishes are usually provided by sealers, oils, varnishes, water repellent preservatives, and other similar materials. 

Water-repellent preservative- A liquid applied to wood to give the wood water repellant properties... 

Natural finish n. Any finish resulting from the application of a transparent substance (such as a varnish, water-repellent preservative, sealer, or oil) which does not affect significantly the original color or grain. 

Water-repellent preservatives contain a fungicide or mildewcide (the preservative), a small amount of wax for water repellence, a resin or drying oil, and a solvent such as mineral spirits or turpentine. A water-repellent preservative may be used as a natural finish. These preservatives do not usually contain coloring pigments. The type of wood determines the color of the resulting finish. The mildewcide prevents wood from darkening. 

During the first few years of application the water-repellent preservative has a short life. Additional applications are usually required each year. Once the wood has weathered to a uniform color the treatments are more durable and refinishing is required only when the surface starts to become unevenly colored by fungi. 

Special color effects may be achieved by adding inorganic pigments to the water-repellent preservatives. The addition of pigment to the finish helps to stabilize the color and increase the durability of the finish. Colors that match the natural color of the wood and extractives are usually preferred. 

Water repellents are water-repellent preservatives with the fungicide, mil-dewcide, and preservative omitted. They are not effective natural finishes by themselves but are used as a stabilizing treatment prior to priming and painting. 

Water Based WOODLIPE is a waterborne, penetrating, paint-able water-repellent preservative for wood and wood-based products. The preservative, 3-iodo-2 propynl butyl carbamate, gives effective protection against mold, mildew, staining and decay fungi. The water repellency provides dimensional stability to minimize checking and warping of wood and wood products. 

Water Based WOODLIPE provides water-repellent preservative protection for millwork items, structural lumber, siding, trusses, flooring, sub-flooring, outside signs, truck and farm equipment bodies, fencing, patios, plywood, and reconstituted wood. 

MITROL PQ-15 RTU is a clear water repellent preservative designed for millwork and other wooden products. MITROL PQ-15 RTU, a prediluted product, contains the preservative copper 8-quinolinolate and is ready-to-use as received. 

Containing copper-8-quinolinolate as the active ingredient, NYTEK 645 Penetrant Sealer is a ready-to-use, water-repellent preservative formulated to prevent the growth of fungi on interior structural materials inside food processing plants. 

---