Varathane Oil Based Spar Urethane offers excellent resistance to exterior wood from ultra-violate rays and weather. This durable finish long last the life and enhance the natural beauty of outdoor wood. It is possible to treat 100-200 square feet of area with 1 liter of liquid.
Features of Oil Based Spar Urethane
- Formula expands and contracts with weather conditions.
- Easy application.
- Self-leveling and fast-drying.
- Ultimate coverage.
- UV Protection.
NOTE: Wait for 27 hours after application for regular use.
How to Apply Varathane Oil Based Spar Urethane
Previously Finished Surfaces - To ensure proper adhesion, surfaces must be clean, dry, and free of wax, grease, oil, shellac, lacquer, mildew, and polishes. Remove wax with a wax stripper, shellac with a paint stripper, and mildew with a solution of 10% household bleach and water. Old finishes in poor condition should be removed. Sand using 150-220 grit sandpaper to obtain a smooth surface. Remove all sanding dust using a vacuum, tack cloth, or cloth dampened with mineral spirits.
Unfinished Surfaces - Sand using 150-220 grit sandpaper and remove all sanding dust using a vacuum, tack cloth, or rag dampened with mineral spirits. If a filler or putty is used, make sure it does not contain wax allow enough time for it to dry thoroughly.
Stained or Painted Wood – Follow manufacturer’s directions for application of the stain or paint. Make certain the surface is thoroughly dry before applying Varathane Oil-Based Spar Polyurethane. Refer to the manufacturer’s label for dry times.
Use in an area with adequate ventilation such as an open garage. Use only when air (ambient) temperature is between 55-90°F (13-32°C) and relative humidity is below 85%. Lower temperatures and/or high humidity may cause slower dry times and slower dry may also result from applications on redwood, cedar or woods with high oil content, or when applied over some stains. Using over white or light paints could cause discoloration. Do not thin. Stir thoroughly before and during use. To prevent bubbles in the finish, DO NOT SHAKE.
Apply using a good quality natural bristle brush or applicator. To prevent bubbles in the finish, do not overbrush or apply with a roller. Allow the finish to dry 8 hours before re-coating. Re-coat only when previous coats have dried clear and feel hard. The coating should no longer feel tacky to the touch. If any coat has dried more than 12 hours, lightly sand before applying another coat. A minimum of two coats is recommended. Allow the finish to dry 24 hours before light use. Wait 3 days before subjecting the surface to normal usage.
Properties of Varathane Oil Based Spar Urethane
|Resin Type||Oil-Modified Urethane|
|Weight||946 ml and 3.78 Ltr|
|Volatile Organic Compounds||<350 g/l (2.9 lbs./gal.)|
|Recommended Dry Film
Thickness (DFT) Per Coat
|Wet Film to Achieve DFT
|Theoretical Coverage at
1 mil DFT (25µ)
at Recommended DFT
|380-760 sq.ft./gal. (9.3-18.7 m2/l)
95-190 sq.ft./quart (2.3-4.7 m2/l)
|Mixing Ratio||1.6:1 base to activator|
|Pot Life||30 minutes maximum|
|Dry Times at 70-80°F
(21-27°C) and 50% RH
|2 hours to touch.
4-6 hours to Handle.
8 hours to re-coat .
|Shelf Life||3 years|
|Flash Point||106°F (41°C)|
|Safety Information||For additional information, see MSDS|
|Technical Data Sheet||Click here|