• Single component, waterproof surface sealer for walkways, stairways, steel, fiberglass, concrete and wood decks.
  • Designed for permanent flexibility, toughness, abrasion resistance and to move with hairline cracks
  • Available in wide range of standard and custom colors & smooth and textured options








24 Standard Colors. Custom Colors are available.




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

  • Extremely tough and abrasion resistant. Allows for expansion and contraction of substrate.
  • Excellent UV resistance and color fastness
  • May be used in marine or industrial situations and in constant submersion conditions
  • Its dense molecular network provides a resilient barrier
  • Has good flexibility at low temperatures, maintains its strength at higher temperatures
  • Easy to apply and user friendly to insure high quality results
  • Will not attract insects, birds, reptiles or vermin
  • Tested and validated by the Sealant Waterproofing and Restoration Institute for Priority Performance in a Deck Coating System
  • Available in wide range of standard and custom colors & smooth and textured options

Various uses

  • Restores the surface of fiberglass water slides and exterior GRP fabrications.
  • Waterproofs planters and landscaped concrete areas.
  • Restore fiberglass decks
  • Reline decorative water fountains

Recommended for

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


Approximate 2 gallons/100 sq ft, depending upon substrate

Container sizes

1 gallon, 5 gallon, 55 gallon


Ethylene elastomer


Preparation and Application

Surface Preparation
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. 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.

Spray Application
NW ‘Z’ GRADE should be used with the following equipment specifications: ratio 30:1 or 40:1 and a #35 or larger tip.

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.

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


For additional information, contact the Andek Technical Department


Technical Data
VOC 420 gms/liter
Moisture Vapor Transmission 0.01 perms ASTM E-96
Tensile Strength 2,000 psi ASTM D-412
Elongation 350% ASTM D-412
Solids 55% (B.W.); 53% (B.V.) ASTM D-1044
Flashpoint 105°F (Closed Cup) FTMS 141A (M4293)
Shore ‘A’ Hardness
75 ASTM D-2240
Weatherometer (5000 hours)
Pass ASTM G-23
Low Temperature Flexibility
180° bend (10°F) ASTM C-711
Density Approx. 9 lb/gallon ASTM D-1475
Viscosity Approx. 15,000 cps ASTM D-446