Water-Based Polyurethane

Product Details

Old Masters® Interior Water-Based Polyurethane is a clear finish that creates a hard, durable coating and can be used on interior wood, primed metal or fiberglass surfaces and will not amber.

 

Directions

Where to Use
Interior Water- Based Polyurethane is recommended for use on interior wood or composite surfaces. It can be used on unfinished wood surfaces or previously finished surfaces that have been properly prepared. This finish can also be used over stained surfaces that have thoroughly dried. Allow oil-based stain to dry a minimum of 24 hours.

Ideal for use on floors, cabinets, doors, furniture, table tops, bars and woodwork.

Surface Preparation
All surfaces must be clean, dry and free from dirt, wax, grease, glue and other contaminants or penetration and adhesion will be affected. DO NOT use over shellac, lacquer, filler, stains or sealers containing stearates. After sanding, remove sanding dust with vacuum or damp cloth. DO NOT use a tack rag to remove dust, as it may leave a residue that will interfere with adhesion.

New Wood: Sand surface thoroughly with medium grit sandpaper and progress to fine grit sandpaper.
Always sand in the direction of the wood grain. Do not use steel wool.

Previously Finished Surfaces: Surface should be sanded to remove imperfections and gloss, using extra fine sandpaper (220 grit),sanding with the grain. Do not use steel wool.

Stained Surfaces: Stain must be thoroughly dry before applying clear finish. Allow oil-based stain to dry a minimum of 24 hours in good drying conditions before top coating. Do not sand uncoated stained surface.

Application
Stir thoroughly before and during application. DO NOT SHAKE. Test the finish on an inconspicuous area to ensure adequate adhesion. Water-Based Polyurethane appears milky in the can but dries clear. Do not apply in direct sunlight or areas of extreme air movement.

  • Apply with a synthetic fiber brush, foam brush, flat pad or sprayer. A short nap roller may be used for large flat areas but must be brushed immediately to alleviate air bubbles. A lambswool applicator may be used for large flat areas.
  • Apply in full even coats in the direction of the grain. If brushing, apply liberally and keep a wet edge, working quickly to ensure an even coat. Apply with care to prevent bubbles in the finish.
  • Allow 1 to 2 hours before recoating. Sand lightly between coats with fine sandpaper (220 grit) to produce a finer finish.
  • If sandpaper gums up allow more dry time. Remove sanding dust.
  • Reapply. Three coats are recommended for greatest durability.

Please note: Testing is very important when applying this product over paints or stains because the appearance of these products may change when a water-based finish is applied. This product gives a soft wood amber that ONLY becomes noticeable when applied over white or pastel paints and stains.

Thinning
Thinning is not recommended, but if necessary, a small amount of water may be added. For spray applications, up to one (1) pint of water per gallon may be used.

Coverage
Approximately 300 to 400 square feet per gallon. Coverage will vary significantly depending on application method and condition of wood.

Drying Time
Apply when air and surface temperatures are between 60° and 90°F and humidity is between 30% and 70%. At 50% relative humidity and 70°F, Interior Water-Based Polyurethane will dry to touch within 30 minutes and ready to recoat after 1 hour. Drying time will be affected by temperature, humidity and film thickness.

Wait 24 hours before subjecting surfaces to light use. Care should be used during the first week after application as the finish is curing to its ultimate hardness. Protect product from freezing prior to and during application.

Cleanup
Wash brushes and equipment in warm, soapy water. Rinse clean.

MAX VOC: 275 grams/liter (2.29 lbs/gal)

Learn More

Why use clear finishes?

Clear finishes are used to seal and protect surfaces. In many cases, clear finishes offer lasting, durable protection from abrasion, marring and chipping.  Most clear finishes also protect the surfaces from damage caused by water and alcohol.  Exterior clear finishes provide protection to withstand water, weather and sunlight.  Use the Clear Finish Selection Guide below to determine which clear finish is best for your project.

Supplies List for Clear Finishing:

  • Fine Grade Sand Paper or Nylon Sanding Pad
  • Tack cloth or clean cloth
  • Stir Stick and Drop Cloth
  • Quality, China Bristle Brush

Technical & Safety

Technical Data Sheets

Safety Data Sheets