RayFlex® 777

 100% Acrylic Polymer

RayFlex 777 is a 100% acrylic polymer.  RayFlex 777 is an APEO and formaldehyde free, self-crosslinking 100% acrylic emulsion polymer designed for flexible roof coatings. Coatings formulated with RayFlex 777 have excellent water and efflorescence resistance, low temperature flexibility, and outstanding tensile properties. RayFlex 777 provides superior adhesion to polyurethane foam and various construction substrates.

Key Features
  • Superior adhesion to polyurethane foam
  • Excellent dirt pickup resistance
  • Excellent tensile properties
  • Very good water resistance and low temperature flexibility
  • Outstanding UV durability
  • APEO-free
RayFlex® 777 Typical Physical Properties
Polymer Type 100% Acrylic Emulsion Polymer
Weight Solids 55%
Viscosity (Brookfield Model RVT) 520 cps, #3/100 rpm
pH 7.2
Tg (MDSC) -26°C
MFFT (ASTM D-2354) <0°C
Particle size (Mean) 0.18 microns
Surfactant charge Anionic
Weight per gallon 8.6 lbs/gal
Freeze thaw stability Do Not Freeze
Download Technical Data Sheet


If any product is defective in workmanship or materials, Specialty Polymers, Inc. will replace the product. The information contained in this Technical Bulletin is intended to be a guideline. It is offered in good faith, but without guarantee. We recommend users of the product perform their own testing to determine the suitability of the product in their application.