A hard, elastic, semi-transparent varnish for use on timber surfaces exposed to sun and rain.
Protection against weather, wood-destroying ultra-violet light is determined by pigment density. In areas of greater exposure 3 coats are recommended to build up pigment density or 1 coat of Bio Wood Primer plus 2 coats of Bio Wood Varnish.
Minimum dry film thickness on an even smooth surface: 60 micron, better 100 micron. Box frames, timber windows, cladding and end grains must be treated with BIO Wood Primer and one coat of BIO Wood Varnish B E F O R E INSTALLATION.
It is also good practice to prime all back surfaces. Reapply once the finish appears to become dull.
Prepare surface in accordance with AS 2311 Painting of Buildings. Do not apply coatings to unseasoned or wet timber.
Wood and other surfaces should be well sanded, dry and cleaned of greasy, waxy and dirty contaminants using BIO Thinner.
Round off sharp edges. Imperfect coats may require complete stripping before applying BIO Products. Hardwoods and other timbers rich in natural oils, waxes, acids and terpenes should be degreased using BIO Thinner, because these substances may mix with the varnish and prolong its drying time.
Stir thoroughly before use with a broad flat stirrer. Brush thinly and evenly working varnish well into the grain. Maintain a wet edge when painting.
Thick coats wrinkle when dry. Avoid bubbles. Lightly sand between coats if necessary with fine sandpaper. Allow 12 to 24 hours to dry between coats.
Low temperatures and humid conditions prolong the drying time. Apply second and subsequent coats only after previous coat has thoroughly dried.
Do not use below +10 C and or above 80% humidity or in cold damp conditions; when condensation, rain, dew or frost are likely to occur; on hot days; in direct sunlight; or on hot surfaces.
Provide adequate ventilation during application and drying. Reaches maximum durability after 8-14 days.
Re-coating is recommended after approximately 2 or 3 years, depending on the exposure to the weather.