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AT-3G™ High-Strength Hybrid Acrylic Adhesive

AT-3G is a hybrid, acrylic-based adhesive for anchoring threaded rod and rebar into cracked and uncracked concrete. Ideal for cold weather and wet concrete applications, AT-3G dispenses easily and offers a fast curing time for same-day bolt up. It can be specified for a wide range of in-service temperatures, and maintains its strong bond strength in extreme environments for ultimate design and jobsite flexibility. Tested and code compliant with the IBC and IRC, AT-3G hybrid adhesive is easy to install with the conventional blow-brush-blow hole cleaning method.

Key Features

  • Excellent for use in cold weather conditions or applications where fast cure is required
  • Recognized per ICC-ES AC308 for threaded rod and rebar anchoring, along with post-installed rebar development and splice length design provisions
  • Conventional blow-brush-blow hole cleaning technique using a wire brush — no power brushing required
  • Base material installation temperatures down to 0°F (-18°C)
  • Use in grout-filled CMU construction
  • Use of a vacuum in lieu of compressed air for hole cleaning
  • Installation into oversized holes
  • Installation in holes drilled with diamond core bits
Mix Ratio/Type 10:1 hybrid-acrylic
Mixed Color Gray
Base Materials Concrete — cracked and uncracked
Base Material Conditions Dry, water-saturated, water-filled holes
Anchor Type Threaded rod or rebar
Substrate Installation Temperature 23°F (-5°C) to 104°F (40°C)
In-Service Temperature Range -40°F (-40°C) to 320°F (160°C)
Storage Temperature 41°F (5°C) and 77°F (25°C)
Shelf Life 18 months
Volatile Organic Compound (VOC) 41 g/L

Applications

Included Parts

  • AMN19Q
View Product
Model No. Option Packaging Qty. Carton Qty. Compatible Tools
AT3G10 9.5 oz. coaxial cartridge
Includes AMN19Q mixing nozzle		 1 6 CDT10S dispensing tool / AMN19Q mixing nozzle

Applications

  • Threaded rod anchor and rebar dowel installations in cracked and uncracked concrete under a wide variety of environmental installation and use conditions
  • Installation in downward, horizontal and upwardly inclined (including overhead) orientations
  • Installation down to 0 F (-18 C)
  • Qualified for use in structures assigned to Seismic Design Categories A through F

Installation

  • Surfaces to receive adhesive must be clean per approved hole cleaning method.
  • Base-material temperatures must be 23°F (-5°C) or above at the time of installation.
  • To warm cold adhesive, 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 2-3 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-3G adhesive performance.
  • For full instructions, see Adhesive Anchoring Installation Instructions.

Clean Up

  • Uncured material — Wipe up with cotton cloths.
  • Cured material — Chip or grind off surface.

Test Criteria

  • AT-3G has been tested in accordance with ICC-ES 308, ACI 355.4 and applicable ASTM test methods.

Cure Schedule

Base Material
Temperature °F		 Base Material
Temperature °C		 Gel Time (mins.) Cure Time (hrs.)
23 -5 50 5
32 0 25 3 1/2
41 5 15 2
50 10 10 1
59 15 6 40 min.
68 20 3 30 min.
86 30 2 30 min.
104 40 2 30
  1. For SI: 1°F = (°C x 9/5) + 32.
  2. For water-saturated concrete, the cure times should be doubled.
  3. For installation of anchors in concrete where the temperature is between 0°F and 23°F (-18°C and -5°C), the adhesive must be conditioned to a minimum temperature of 65°F (18°C).

AT-3G Typical Properties

Property Class A (35°–40°F) Class B (40°–60°F) Class C (>60°F) Test Method
Consistency Non-sag Non-sag Non-sag ASTM C881
Bond Strength, Slant Shear Hardened-to-Hardened Concrete, 2-Day Cure1 2,800 psi 2,800 psi 2,800 psi ASTM C882
Hardened-to-Hardened Concrete, 14-Day Cure1 3,200 psi 3,100 psi 3,250 psi
Compressive Yield Strength, 7-Day Cure2 10,300 psi 13,400 psi 15,000 psi ASTM D695
Compressive Modulus, 7-Day Cure2 1,400,000 psi 1,550,000 psi 1,650,000 psi ASTM D695
Heat Deflection Temperature, 7-Day Cure3 258°F (126°C) ASTM D648
Glass Transition Temperature, 7-Day Cure3 237°F (114°C) ASTM E1640
Decomposition Temperature, 24-Hour Cure3 480°F (250°C) ASTM E2550
Water Absorption, 24-Hours, 7-Day Cure3 0.90% ASTM D570
Shore D Hardness, 24-Hour Cure3 81 ASTM D2240
Linear Coefficient of Shrinkage, 7-Day Cure3 0.000 in./in. ASTM D2566
Coefficient of Thermal Expansion3 2.6 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.

Related Literature

Anchoring, Fastening, Restoration and Strengthening Systems for Concrete and Masonry
C-A-2023
A catalog of products belonging to our anchoring, fastening, restoration and strengthening systems for concrete and masonry.
Catalog
Sistemas de anclaje, sujeción, restauración y fortalecimiento para concreto y mampostería
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Un catálogo completo de productos e información para los sistemas de anclaje, sujeción, restauración y fortalecimiento para concreto y mampostería.
Catalog
Connectors, Fasteners & Anchors for Mass Timber Construction
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A catalog featuring connectors, fasteners and anchors for mass timber and CLT construction solutions.
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Deck Connection and Fastening Guide
F-DECKCODE22
A guide to deck building and for retrofitting safer, longer-lasting outdoor decks, with 2018 and 2021 IRC/IBC code-compliant solutions for using the latest anchors, connectors and fasteners.
Product Guide
High Wind Guide
F-C-HWG23
A comprehensive guide to help designers select the most appropriate connections for high-wind regions.
Product Guide
Technical Data Sheet for AT-3G™ Anchoring Adhesive
T-A-AT3GDTASAF23
This AT-3G™ technical data sheet includes product features, packaging options, technical data and installation information.
Data Sheet
Ficha de Datos Técnicos para AT-3G™
T-A-AT3GDTASAF23SP
Esta hoja de datos de AT-3G incluye las características del producto, opciones de empaque, datos técnicos e información de instalación.
Data Sheet
AT-3G™ Hybrid-Acrylic High-Strength Anchoring Adhesive
F-A-AT3G23
A flier illustrating the features and benefits of AT-3G™ hybrid-acrylic high-strength anchoring adhesive.
Flier
3G Adhesive Family Bonded by versatility.
S-A-3GFAMWOC24
A sales flier featuring the three adhesives that make up the 3G brand of anchoring adhesives - SET-3G, AT-3G and ET-3G.
Flier
Transition to the 3G Adhesive Family - Product Conversion
S-A-3GTRNSXREF23
A cross-reference sheet for the 3G anchoring adhesive products that have replaced SET-XP, AT-XP and ET-HP.
Flier
Product Solutions for Commercial Institutional Construction
S-CM-INSTITUTN24
An eight-page flier featuring building products specific to the Commercial Institutional Building market.
Flier
Volatile Organic Compound (VOC)
T-A-VOC23
A technical bulletin providing information regarding Simpson Strong-Tie concrete repair and strengthening, and anchor adhesive products' VOC grams/liter measurements.
Technical Bulletin
Canadian Addendum for 2023 Anchor Catalogue
TEBC-A-2023
This technical engineering bulletin for Canada, TEBC-A-2023, provides a supplement to the Anchoring, Fastening and Restoration Systems for Concrete and Masonry catalog, C-A-2023.
Technical Bulletin
Connector Solutions to Meet the Wall Bracing Requirements of the International Residential Code®
T-C-WALLBRACE23
A technical bulletin providing technical information about wall bracing methods and code sections that require connectors (e.g., holdowns or straps) and anchors.
Technical Bulletin
Coil-Threaded Rod Installed with SET-3G™, SET-XP®, AT-XP®, AT-3G™ and ET-3G™ Anchoring Adhesives into Cracked and Uncracked Concrete
L-A-COILTHRD23
The evaluation reports for SET-3G™, SET-XP®, AT-XP®, AT-3G™ and ET-3G™ present the typical bond strengths of each adhesive for threaded rod and reinforcing bar (rebar) installations in concrete.
Engineering Letter
Epoxy-Coated Reinforcing Bar Installed with SET-3G™, SET-XP®, AT-XP®, ET-HP®, AT-3G™ and ET-3G™ Anchoring Adhesives into Cracked and Uncracked Concrete
L-A-EPXYCTDRB23
The evaluation reports for SET-3G™, SET-XP®, AT-XP®, ET-HP®, AT-3G™ and ET-3G™ present the typical bond strengths of each adhesive for uncoated reinforcing bar (rebar) installations in concrete.
Engineering Letter
Owens Corning PINKBAR™ Installed with SET-3G™, AT-3G™ and AT-XP® Anchoring Adhesives into Cracked and Uncracked Concrete
L-A-OCPB24
The evaluation reports for SET-3G™, AT-3G™ and AT-XP® present the characteristic bond strength of the adhesives for steel reinforcing bar (rebar) installations in concrete.
Engineering Letter
Simpson Strong-Tie® AT-3G™ Adhesive for Core-Drilled Holes into Uncracked Concrete
L-A-AT3GCRDR24
This letter addresses the use of AT-3G™ anchoring adhesive for use with threaded rod and reinforcing bars in holes core-drilled into uncracked concrete.
Engineering Letter
Substitution of Simpson Strong-Tie AT-3G™ Adhesive for AT-XP® Adhesive for Anchorages to Concrete
L-A-AT3GSUBXPC24
This letter is applicable for adhesive anchors installed in either dry concrete or water-saturated concrete where holes are drilled with carbide-tipped drill bits at the recommended nominal diameter.
Engineering Letter
Metric Reinforcing Bar Installed with AT-3G™ Anchoring Adhesives into Cracked and Uncracked Concrete
L-A-MRIHAT3G24
The evaluation report for AT-3G™ presents the characteristic bond strength of the adhesive for imperial reinforcing bar (rebar) installed in holes drilled with imperial bits in concrete.
Engineering Letter
Simpson Strong-Tie AT-3G™ Adhesive Installed at Temperatures Below 23°F (-5°C)
L-A-AT3G0DEG24
This letter addresses the installation of threaded rod and rebar anchors with AT-3G™ adhesive into concrete that has a temperature below 23°F (-5°C) at the time of installation.
Engineering Letter
Substitution of AT-3G™ Adhesive for AT-XP® Adhesive for Anchor Installations into Grout-Filled CMU Construction
L-A-AT3GSUBXPM24
This letter is applicable for adhesive anchors installed in dry grout-filled CMU where holes are drilled with carbide-tipped drill bits at the recommended nominal diameter.
Engineering Letter
Safety Data Sheet for AT-3G™
SDS-AT3G-NA-ENG-0222
Intended to provide information for use in workplace chemical management; information such as physical properties; hazards; protective measures; precautions for handling, storing, and transportation.
SDS
Safety Data Sheet for AT-3G™/Fiche de Données de Sécurité pour AT-3G™
SDS-AT-3G-1222-ENG-NA-FR
Intended to provide information for use in workplace chemical management; information such as physical properties; hazards; protective measures; precautions for handling, storing, and transportation.
SDS
Ficha de Datos de Seguridad para AT-3G™
SDS-AT-3G-NA-ES-1222
Diseñado para dar información útil en la gestión de químicos en el lugar de trabajo; p.ej. propiedades físicas; riesgos; medidas de protección; precauciones para manejo, almacenamiento y transporte.
SDS

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT

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