RayFlex® 303

Acrylic Elastomer

RayFlex 303 is a high-solids, acrylic elastomer emulsion polymer for high-performance wall mastics and roof coatings. RayFlex 303 is specifically designed
to provide outstanding adhesion to a wide variety of construction substrates.
Coatings formulated with RayFlex 303 have excellent exterior durability, tensile
properties, and dirt pick-up resistance.

Key Features
  • Excellent adhesion to a wide variety of construction substrates
  • High tensile strength and elongation
  • Excellent exterior durability and UV resistance
  • Excellent dirt pick-up resistance
RayFlex® 303 Typical Physical Properties
Polymer Type Acrylic Emulsion Polymer
Weight Solids 59%
Viscosity (Brookfield Model RVT) 400 cps, #3/100 rpm
pH 9.0
Tg (MDSC) -17°C
MFFT (ASTM D-2354) <0°C
Particle size (Mean) 0.27 microns
Surfactant charge Nonionic/Anionic
Weight per gallon 8.58 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.