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AT-XP® High-Strength Acrylic Adhesive

Acrylic Anchoring Adhesives

This product's information may differ depending on the category of use. You are currently viewing details related to Acrylic Anchoring Adhesives. You can also view product information related to the category: Strong-Rod® URS Components

Attention — AT-XP10 has limited availability because of cartridge supply disruptions. AT-XP13 and AT-XP30 will remain available during this period.

AT-XP is an acrylic-based high-strength anchoring adhesive. AT-XP is a 10:1 ratio, two-component, anchoring adhesive for use in threaded rod and rebar into concrete (cracked and uncracked) and masonry (uncracked) under a wide range of conditions. AT-XP adhesive dispenses easily in cold or warm environments and in below-freezing temperatures with no need to warm the cartridge.

Key Features

  • Excellent for use in cold weather conditions or applications where fast cure is required.
  • Design flexibility — superior sustained load performance at elevated temperature.
  • Jobsite versatility — can be specified for dry and damp conditions when in-service temperatures range from -40°F (-40°C) to 180°F (82°C).
  • Approved for installation with vacuum-drill bit system without further hole cleaning. See Code Report (ER-263) for approved system.
  • Passed the demanding ICC-ES AC308 adverse-condition tests pertaining to reduced and elevated temperatures and long-term sustained loads.
  • Easy hole-cleaning procedure — no power-brushing required.
  • Manufactured in the USA using global materials.
Mix Ratio/Type 10:1 acrylic
Mixed Color Teal
Base Materials Concrete — cracked and uncracked
Masonry — uncracked
Base Material Conditions Dry, water-saturated
Anchor Type Threaded rod or rebar
Substrate Installation Temperature 14°F (-10°C) to 100°F (38°C)
In-Service Temperature Range -40°F (-40°C) to 180°F (82°C)
Storage Temperature 14°F (-10°C) and 80°F (27°C)
Shelf Life 18 months for AT-XP10; 12 months for AT-XP13 and AT-XP30
Volatile Organic Compound (VOC) 30 g/L
Model No. Option Packaging Qty. Carton Qty. Compatible Tools
AT-XP10 9.4 oz. (16.9 in.3) coaxial cartridge
Includes AMN19Q mixing nozzle
1 6 CDT10S dispensing tool / AMN19Q mixing nozzle
AT-XP13 12.5 oz. (22.5 in.3) side-by-side cartridge
Includes AMN19Q mixing nozzle
1 10 ADT813S dispensing tool / AMN19Q mixing nozzle
AT-XP30 30 oz. (54 in.3) side-by-side cartridge
Includes AMN19Q mixing nozzle
1 5 ADT30S, ADTA30P or ADTA30CKT dispensing tool / AMN19Q mixing nozzle


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


  • Surfaces to receive adhesive must be clean.
  • Base material temperature must be 14°F or above at the time of installation. For best results, material should be 14°F (–10°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 to facilitate warming.
  • Mixed material in nozzle can harden in 3–4 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 AT-XP adhesive performance.
  • For full instructions, see Adhesive Anchoring Installation Instructions.

Clean Up

Uncured material — Wipe up with cotton cloths. If desired, approved solvents, such as ketones (MEK, acetone, etc.), lacquer thinner, or adhesive remover can be used. DO NOT USE SOLVENTS TO CLEAN ADHESIVE FROM SKIN. Take appropriate precautions when handling flammable solvents. Solvents may damage surfaces to which they are applied. Cured material — Chip or grind off surface.

Test Criteria

  • AT-XP 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.)
1. For water-saturated concrete, the cure times must be doubled.
14 -10 30 24
32 0 15 8
50 10 7 3
68 20 4 1
85 30 1 1/2 30 min.
100 38 1 20 min.

AT-XP Typical Properties

Property Class A Class B Class C Test Method
(0°–40°F) (40°–60°F) (>60°F)
Consistency Non-sag Non-sag Non-sag ASTM C881
Bond Strength, Slant Shear Hardened to Hardened Concrete, 2-Day Cure1  1,900 psi 2,500 psi 3,200 psi ASTM C882
Hardened to Hardened Concrete, 14-Day Cure1  2,100 psi 3,750 psi 3,550 psi
Compressive Yield Strength, 7-Day Cure2 11,800 psi  14,900 psi 18,800 psi ASTM D695
Compressive Modulus, 7-Day Cure2  388,000 psi 565,000 psi 718,000 psi ASTM D695
Heat Deflection Temperature, 7-Day Cure3 253°F (123°C) ASTM D648
Glass Transition Temperature, 7-Day Cure3 266°F (130°C) ASTM E1356
Decomposition Temperature, 24-Hour Cure3 450°F (230°C) ASTM E2550
Water Absorption, 24-Hours, 7-Day Cure3 0.10% ASTM D570
Shore D Hardness, 24-Hour Cure3 86 ASTM D2240
Linear Coefficient of Shrinkage, 7-Day Cure3 0.002 in./in. ASTM D2566
Coefficient of Thermal Expansion3 3.2 x 10-5 in./in.°F ASTM C531
  1. Material and curing conditions: Class A at 35° ± 2°F, Class B at 40° ± 2°F, Class C at 60° ± 2°F.
  2. Material and curing conditions: Class A at 0° ± 2°F, Class B at 40° ± 2°F, Class C at 60° ± 2°F.
  3. Material and curing conditions: 73° ± 2°F.

Suggested Specifications

Anchoring adhesive shall be a two-component, high-solids, acrylic-based system supplied in manufacturer's standard cartridge and dispensed through a static-mixing nozzle supplied by the manufacturer. The adhesive anchor shall have been tested and qualified for performance in cracked and uncracked concrete per ICC-ES AC308. Adhesive shall be AT-XP adhesive from Simpson Strong-Tie, Pleasanton, CA. Anchors shall be installed per Simpson Strong-Tie instructions for AT-XP adhesive. For additional questions, contact Simpson Strong-Tie.

Patent Information

  • US Patents 9,416,300; 8,552,119; 8,334,346

Related Literature

Code Reports & Compliance