J33 Opak is a high-performance water-based emulsion paint developed for professional results on both interior and selected exterior surfaces.
 
Engineered with acrylic copolymers in aqueous dispersion, this formulation provides high opacity and a rich, extra-matt finish that effectively conceals imperfections, particularly over large, light-sensitive areas.
 
Ideal for use indoors on walls and ceilings, particularly in new builds or renovations where smooth and even finishes are required. Its excellent hiding power and whiteness make it well-suited for office buildings, commercial spaces, and residential interiors. It may also be used externally on vertical masonry, such as façades, and warehouses - provided these are located in temperate, dry climates and protected from severe weather conditions.
 
It can also be used on patios in areas subject to occassional, light foot traffic.
 
Key Features and Benefits
Outstanding whiteness and hiding power
Extra-matt finish hides surface blemishes and uneven light reflection
Class 1 wet-scrub resistance and easy cleanability
Breathable finish supports long-term surface durability
Anti-mould protection for healthier environments
Non-splatter formulation for cleaner on-site application
Excellent adhesion on mineral substrates like plaster, cement, and concrete
 
Certifications and Performance Standards
 
J33 Opak meets key professional benchmarks, including:
Fire Retardant on non-combustible substrates: Certified B-s1, d0 according to EN 13501 1:2007+A1:2009
Class 1 wet-scrub resistance (UNE-EN ISO 11998:2007)
Class 1 opacity performance (UNE-EN ISO 6504-3:2007, Method B)