HYDROSTOP® PremiumCoat® Finish Coat


The HydroStop® PremiumCoat® Finish Coat is a water-based acrylic top coat. Used in conjunction with the HydroStop® PremiumCoat® Foundation Coat and HydroStop® PremiumCoat® Fabric, it creates the HydroStop® PremiumCoat® System which is a roofing and waterproofing solution for coating, recover, reroof and new roof applications. It provides a fully-adhered, adhesively attached, breathable acrylic membrane and a complete roof cover.

Sizes Available:

2 gallon (7.6 liter) pail
5 gallon (19 liter) pail
55 gallon (208 liter) drum

Colors Available:

White, Battleship Gray, Brown, Charcoal, Cotton, Charleston Green, Desert Sand, Dove Gray, Linen, Patina Green, Terra Cotta, Tinners Red


  • Metal (historic or commercial) roof cooling and waterproofing
  • Flat and low-pitched roof waterproofing, including BUR, concrete (structural or LW), EPDM, Hypalon®, modified bitumen, PVC, and TPO
  • Parapet wall & Exterior wall waterproofing

Physical Properties

Finish Flat
Standard Colors White, Cotton, Desert Sand, Dove Grey, Battleship Grey, Patina Green, Charleston Green, Brown, Terra Cotta, Tinner’s Red, Charcoal, Linen. *Custom colors available
VOC < 50 g />L
Solids By Volume 52% (±2) [ASTM D2697]
Solids By Weight 66% (±2) [ASTM D1644]
Typical Density 12.0 (±0.3) lb/gal
Viscosity Krebs: 130 [ASTM D562] Brookfield 6rpm: 66,400 [ASTM D2196]
Tensile Strength 207 psi [ASTM D2370]
Permeance 3.9 [ASTM D1653]
Solar Reflectance (white) 79% initial, 70% aged
Thermal Emittance (white) 0.90 initial, 0.90 aged
SRI (white) 99 initial, 86 aged
Elongation Initial: 306% [ASTM D2370]
Post 1,000 hrs Xenon: 148%
Tear Resistance 93 [ASTM D624]
1,000 hours: Pass, no change
[ASTM D4798]
Low Temp Flexibility Pass, -15°F after 1,000 hrs Xenon
[ASTM D522]
Water Swelling 9.2 after 7 days exposure [ASTM D471]
Wet Adhesion 8.7 [ASTM D903]
Fungi Resistance 0 rating [ASTM G21]
Typical Service Limits -30°F to 200°F (-37°C to 93°C)
Application Temp min. +40°F to 105°F (ambient)
Water Swelling (Touch dry) 1–4 hours at 77°F
@ 40% RH; depends on color
Full Cure 7 Days


All documents are U.S. English unless otherwise noted

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