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ET-3G™ Epoxy Adhesive

ET-3G is a two-component, high-solids, epoxy-based system ideal for general anchoring of threaded rod and rebar into concrete (cracked and uncracked) and masonry (cracked and uncracked).

Key Features

  • Suitable for use under static and seismic loading conditions in cracked and uncracked concrete and masonry
  • Ideal for general doweling and threaded rod applications
  • Two-year shelf life for unopened cartridges stored between 45°F (7°C) and 90°F (32°C)
Mix Ratio/Type 1:1 epoxy
Mixed Color Teal
Base Materials Concrete and masonry — cracked and uncracked
Base Material Conditions Dry, water-saturated
Anchor Type Threaded rod or rebar
Substrate Installation Temperature 50°F (10°C) to 110°F (43°C)
In-Service Temperature Range -40°F (-40°C) to 150°F (65°C)
Storage Temperature 45°F (7°C) and 90°F (32°C)
Shelf Life 24 Months
Volatile Organic Compound (VOC) 3 g/L
Model No. Option Packaging Qty. Carton Qty. Compatible Tools
ET3G10 8.5-oz. single cartridge
Includes (1) EMN22i mixing nozzle and (1) extension
1 12 CDT10S
ET3G22-N 22-oz. side-by-side cartridge
Includes (1) EMN22i mixing nozzle and (1) extension
ET3G56 56-oz. side-by-side cartridge (nozzle not included) 1 6 EDTA56P


  • Threaded rod anchoring and rebar doweling into concrete and CMU
  • Suitable for horizontal, vertical and overhead applications
  • Multiple DOT listings


  • Surfaces to receive epoxy must be clean.
  • Base material temperature must be 50°F (10°C) or above at the time of installation. For best results, material should be 70°F (21°C) to 80°F (27°C) at time of application.
  • To warm cold material, store cartridges in a warm, uniformly heated area or storage container. Do not immerse cartridges in water or use microwave to facilitate warming.
  • Mixed material in nozzle can harden in 30 minutes at temperatures of 70°F (21°C) and above.
  • Use only Simpson Strong-Tie mixing nozzles in accordance with Simpson Strong-Tie instructions. Modification or improper use of mixing nozzle may impair ET-3G adhesive performance.
  • For full instructions, see Adhesive Anchoring Installation Instructions.

Test Criteria

  • ET-3G has been tested in accordance with ICC-ES AC308, AC58, ACI 355.4 and applicable ASTM test methods.

Cure Schedule

Base Material
Temperature °F
Base Material
Temperature °C
Gel Time (mins.) Cure Time (hrs.)
For water-saturated concrete, the cure times must be doubled.
50 10 100 72
60 16 75 48
70 21 50 24
90 32 30 24
110 43 18 24

ET-3G Typical Properties

Property Class C Test Method
Consistency Non-sag ASTM C881
Bond Strength, Slant Shear Hardened to Hardened Concrete, 2-Day Cure1 2,600 psi ASTM C882
Hardened to Hardened Concrete, 14-Day Cure1 2,900 psi
Fresh to Hardened Concrete, 14-Day Cure2 2,000 psi 
Compressive Yield Strength, 7-Day Cure1 13,000 psi ASTM D695
Compressive Modulus, 7-Day Cure1 580,000 psi ASTM D695
Heat Deflection Temperature, 7-Day Cure2 132°F (56°C) ASTM D648
Glass Transition Temperature, 7-Day Cure2 124°F (51°C) ASTM E1356
Decomposition Temperature, 24-Hour Cure2 500°F (260°C) ASTM E2550
Water Absorption, 24-Hours, 7-Day Cure2 0.15% ASTM D570
Shore D Hardness, 24-Hour Cure2 84 ASTM D2240
Linear Coefficient of Shrinkage, 7-Day Cure2 0.002 in./in. ASTM D2566
Coefficient of Thermal Expansion2 2.4 x 10-5 in./in.°F ASTM C531
  1. Material and curing conditions: 60° ± 2°F.
  2. Material and curing conditions: 73° ± 2°F.

Suggested Specifications

Anchoring adhesive shall be a two-component high solids epoxy based system supplied in manufacturer's standard side-by-side cartridge and dispensed through a static-mixing nozzle supplied by the manufacturer. Epoxy shall meet the minimum requirements of ASTM C-881 specification for Type I, II, IV, and V, Grade 3 and Class C, and must develop a minimum 13,390 psi compressive yield strength after 7 day cure. Epoxy must have a heat deflection temperature of a minimum 168°F (76°C). Adhesive shall be ET-3G adhesive from Simpson Strong-Tie, Pleasanton, CA. Anchors shall be installed per Simpson Strong-Tie instructions for ET-3G adhesive.

Related Literature

Code Reports & Compliance