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CSS V-Wrap™ 770 Epoxy Primer and Saturant

CSS V-Wrap 770 is a two-part, 100% solids epoxy for high-strength composite bonding applications. CSS V-Wrap 770 matrix material is combined with CSS V-Wrap carbon and glass fabrics to provide a wet-layup composite for strengthening of structural members. It is formulated to provide high elongation to optimize properties of the CSS V-Wrap composite systems. It provides a long working time for application, with no offensive odor. CSS V-Wrap 770 may be thickened with fumed silica to produce a tack coat/putty or a finishing coat, depending upon the project requirements. CSS V-Wrap 770 contains no volatile organic compounds (VOC) or solvents.

Key Features

  • ICC-ES ESR-4930 listed product
  • UL Listed
  • 100% solvent-free
  • Good high / low temperature properties
  • High elongation
  • NSF/ANSI Standard 61 listed product for drinking water systems
  • Density: Part A: 9.7 lb./gal (1.16 kg/L), Part B: 7.9 lb./gal (0.95 kg/L), Mixed: 9.17 lb./gal (1.11 kg/L)


CSS V-Wrap 770 is a multi-use epoxy that performs as a primer, tack coat/putty, and saturating resin for the CSS V-Wrap carbon and glass fiber systems. Fumed silica may be added to thicken the resin. The maximum ratio by volume is 1.5 of fumed silica to 1 part of resin.


  • Part A: clear
  • Part B: clear
  • Mixed: clear

Mixing Ratio

  • 100A:41B by volume
  • 100A:33B by weight

Storage Conditions

  • Store material in a dry area between 40°F (4°C) and 100°F (38°C) with no exposure to moisture

Shelf Life

  • 24 months stored in unopened containers at 70°F (21°C)

Limited Warranty

  • This product is covered by the Simpson Strong-Tie® RPS Product Limited Warranty, which is available at strongtie.com/limited-warranties or by calling Simpson Strong-Tie at (800) 999-5099

Related Literature

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