NW ‘Z’ GRADE is a premium quality single component waterproofing coating for concrete decks, walkways, and stairways. It is also used on steel, fiberglass, and wood decks. It is solvent-based and may be applied in any temperature range. NW ‘Z’ GRADE is designed for permanent flexibility and toughness, abrasion resistance, and to bridge and move with hairline cracks, and to resist impingement attack. It may be used in marine or industrial situations and in constant submersion conditions.


Outstanding Features:


Various Uses:


Recommended for:

Can be used over concrete, fibreglass composites, insulation, most metals, mineral composites, wood, wood composites, rubber, plastic composites and other surfaces.





Caution! Read this entire data sheet before continuing.

Surfaces must be dry, free of dirt or loose debris, and free of oil, grease, or any substance that would interfere with adhesion. All repairs of damage or defects must be made prior to product application.

NW ‘Z’ GRADE is applied straight out of the can after 2 minutes of gentle low speed mixing or stirring. Apply the product using brush, roller, or spray technique. If airless spray application is desired, NW ‘Z’ GRADE should be used with the following equipment specifications: ratio 30:1 or 40:1 and a #35 or larger tip. Apply NW ‘Z’ GRADE in a smooth, even fashion to achieve a uniform coating thickness 2 coats. Allow sufficient ventilation to promote thorough drying between coats and before service. Drying time in well ventilated circumstances is 12 hours at 70°F (50% R.H.) for 16 mils wet film thickness.


Clean up:

Clean tools and equipment with xylene or toluene solvents.



Do not apply to wet or frozen surfaces that are saturated with moisture. Proper surface preparation is important to product performance. Shelf life is 24 months in unopened cans stored indoors. This product is flammable. Keep away from sources of heat, sparks, and flames. Use only EP rated equipment.



NW ‘Z’ GRADE is re-coatable. If an area becomes damaged, re-coat with NW ‘Z’ GRADE. Do not allow the solvents to contact NW ‘Z’ GRADE that has been applied.



Read the container label warning and Material Safety Data Sheet (MSDS) for important health and safety information prior to the use of this product.

Keep out of reach of children and pets.

For additional information, contact our Technical Department.


Technical Data:



Notice: The information presented herein is based on tests and data that Andek Corporation believes to be reliable. It is intended for use by technically qualified personnel at their own discretion and risk. Since conditions of handling and use are beyond our control, we make no warranties, express or implied, and assume no liability in connection with any use of this information. Nothing herein is to be construed as a license to operate or a recommendation to infringe any patent.