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ET-HP® Epoxy Adhesive


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Coming June 2020, new updated Concrete Anchoring Adhesive product labels.

ET-HP is a two-component, high-solids, epoxy-based system for use as a high-strength, non-shrink anchor-grouting material. Resin and hardener are dispensed and mixed simultaneously through the static mixing nozzle. ET-HP is formulated for anchoring threaded rod and rebar into concrete (cracked/uncracked) and masonry.

Key Features

  • Passed the demanding ICC-ES AC308 adverse-condition tests pertaining to elevated temperatures and long-term sustained loads
  • Code listed under the IBC/IRC for cracked and uncracked concrete per ICC-ES ESR-3372
  • Code listed under the IBC/IRC for masonry per IAPMO UES ER-241
  • Code listed under the IBC/IRC for Unreinforced Masonry (URM) per ICC-ES ESR-3638
  • Suitable for use under static and seismic loading conditions in cracked and uncracked concrete and masonry
  • Cure times: 24 hours at 70°F (21°C), 72 hours at 50°F (10°C)
  • Easy hole-cleaning — no power-brushing required
  • Suitable for use in dry or water-saturated concrete
  • When properly mixed, adhesive will be a uniform gray color
  • Available in 22 oz. cartridges packaged either with or without nozzles and in 1-gallon, 10-gallon and 100-gallon kits for high-volume applications utilizing metering pumps
  • Manufactured in the USA using global materials
  • Tested per ACI 355.4 and AC308
Model No. Option Packaging Qty. Carton Qty. Compatible Tools
ET-HP22-N 22-oz. side-by-side cartridge w/ EMN22i mixing nozzle 1 10 EDT22S, EDTA22P, EDTA22CKT dispensing tools


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

Product Includes

  • ET-HP22-N — One EMN22i mixing nozzle and one nozzle extension are supplied with each cartridge

Storage Conditions

  • For best results store between 45°F–90°F. To store partially used cartridges, leave hardened nozzle in place. To re-use, attach new nozzle.

Shelf Life

  • 24 months from date of manufacture in unopened container


  • 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-HP adhesive performance.
  • For full instructions, see Adhesive Anchoring Installation Instructions.

Cure Schedule

Base Material
Temperature °F
Base Material
Temperature °C
Gel Time (mins.) Cure Time (hrs.)
1. For water-saturated concrete, the cure times must be doubled.
50 10 45 72
60 16 30 24
80 27 20 24
100 38 15 24

Test Criteria

Anchors installed with ET-HP adhesive have been tested in accordance with ICC-ES Acceptance Criteria for Post-Installed Adhesive Anchors in Masonry Elements (AC58) and Adhesive Anchors in Concrete Elements (AC308).

Property Test Method Result*
*Material and curing conditions: 73 ± 2˚F, unless otherwise noted.
Consistency ASTM C881 Non-sag/thixotropic paste
Heat deflection ASTM D648 145°F (63°C)
Glass transition temperature ASTM D648 168°F (76°C)
Bond strength (moist cure, 60°F) ASTM C882 2,963 psi (2 days)
3,002 psi (14 days)
Water absorption ASTM D570 0.0% (24 hours)
Compressive yield strength (cured 60°F) ASTM D695 14,260 psi (7 days)
Compressive modulus ASTM D695 775,850 psi (7 days)
Gel time ASTM C881 10 minutes
Shore D Durometer ASTM D2240 87
Volatile Organic Compound (VOC) 3 g/L

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, Class B and C, except gel time, 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-HP adhesive from Simpson Strong-Tie, Pleasanton, CA. Anchors shall be installed per Simpson Strong-Tie instructions for ET-HP adhesive.

Related Literature

Code Reports & Compliance