Zinsser Grade 1 - Premium Interior Restoration Coating

Designed to provide outstanding performance in historic and traditional buildings. This high-performance, self-priming finish is ideal for walls and ceilings, delivering the quality of a solvent-based paint without the high odour levels. It effectively seals and blocks tough stains from water, fire, smoke, and nicotine, ensuring a clean, bright white finish that does not yellow over time.

Key Features

• Zinsser Grade 1 is a high-performance, self-priming finish for the interior decoration of walls and ceilings in historic and traditional buildings.
• 3,000 shades from RAL, NCS, and British Standard colours.
• Applicable on new or previously painted interior walls, ceilings, paneling, and other related paintable surfaces.
• Seals difficult stains from water, fire, smoke, and nicotine without unpleasant odours.
• Adheres to glossy surfaces without pre-sanding or deglossing, offering a non-yellowing, dead-flat finish.
  • For best results on clear finishes use Zinsser B-I-N Primer Sealer
• High pH resistance (up to 12.5) for concrete, lime-based plaster, plaster, stucco, and fast set joint/texture compounds.
• Contains a biocide to protect the dried coating against fungal degradation and allows the substrate to breathe.

Recommended Uses

Ideal for use on new or previously painted interior surfaces, Zinsser Grade 1 can be applied to:

• Drywall
• Cured plaster
• Cement and poured concrete
• Concrete block and stucco
• Wood (cedar, redwood, pine, fir, birch, oak, and plywood)
• Aluminium, iron, steel, and galvanised metal
• PVC, glossy laminates, and powder coatings

This product is resistant to high pH surfaces, making it suitable for concrete, lime-based plaster, and other alkaline substrates.

Application and Performance

Zinsser Grade 1 is easy to apply with a brush, roller, or airless sprayer, producing an even, elliptical pattern when sprayed. Its high solids formula provides superior stain-blocking performance, adhering strongly to glossy and hard-to-paint surfaces without the need for tedious sanding or deglossing. The dead-flat finish not only looks great but is also washable, ensuring long-lasting aesthetics.

For long-term odour sealing, even on warm and humid days, use Zinsser B-I-N primer-sealer.

Limitations

While Zinsser Grade 1 is versatile and highly effective, it is not recommended for exterior surfaces or applications on floors, decks, roof surfaces, or any areas subject to immersion or prolonged contact with water. These limitations ensure optimal performance and longevity of the coating.

Do not thin.

Safety Information

According to the Safety Data Sheet (SDS), Zinsser Grade 1 is classified as a flammable liquid and may cause skin sensitisation. It should be stored in a well-ventilated place away from heat, sparks, open flames, and hot surfaces. The product contains hydrocarbons, C10-C12, iso-alkanes, and 4,5-dichloro-2-octyl-2H-isothiazol-3-one, which may cause skin irritation and allergic reactions. Proper protective equipment, such as gloves and eye protection, should be worn during application.

Zinsser Grade 1 carries the UN number UN1263 and is classified under transport hazard class 3. It is a flammable liquid and vapour that may cause an allergic skin reaction. Safety precautions include storing in a cool, well-ventilated place and avoiding inhalation or skin contact. The product does not contain Diisocyanates.