Simpson Strong-Tie AT-XP 12.5-oz. High-Strength Acrylic Anchoring Adhesive Cartridge w/ Nozzle is a two-component acrylic anchoring adhesive for setting threaded rod and rebar into concrete and masonry. This is an anchoring adhesive designed for structural anchoring in concrete and masonry. Model Number: AT-XP13. If you need a fast-curing adhesive anchor that can keep working through cold installs and changing jobsite conditions, this is the kind of cartridge you reach for.

AT-XP uses a 10:1 mix ratio and comes in a 12.5 fluid ounce side-by-side cartridge. In practical terms, that gives you a cartridge format made for controlled dispensing and consistent mixing through the included nozzle. When mixed properly, the adhesive turns teal, which gives the installer a quick visual check that the material is blended correctly before it goes into the hole.

Where this product separates itself is temperature flexibility. Simpson Strong-Tie rates it for substrate installation temperatures from 14 degrees Fahrenheit to 100 degrees Fahrenheit, and it dispenses in cold or warm environments without needing cartridge warming. That matters on jobs where you do not have time to baby the material or wait on weather. It is also rated for in-service temperatures from negative 40 degrees Fahrenheit to 180 degrees Fahrenheit, so once installed, it is built to handle a wide operating range.

This acrylic adhesive is formulated for anchoring threaded rod and rebar into cracked and uncracked concrete as well as uncracked masonry. It is also suitable for static and seismic loading conditions where the application and design call for it. For contractors doing structural retrofit work, guardrail posts, sill plate anchoring, equipment fastening, or rebar doweling, that broader approval range is a real advantage because it opens up more legitimate use cases from one cartridge type.

Jobsite practicality is a big part of the appeal here. AT-XP can be specified for dry and damp conditions, and Simpson Strong-Tie states that it is approved for installation with a vacuum-drill bit system without further hole cleaning when used in accordance with the applicable code report. That can save steps compared to anchor installations that demand more cleanup before adhesive placement. Less prep time means faster anchor installation when the system and report allow it.

On the compliance side, this adhesive is tested in accordance with ICC-ES AC308 and AC58, with report references ER-263 and ER-281, along with ACI 355.4 and applicable ASTM test methods. It is also compliant with NSF/ANSI Standard 61. Those are the details serious users look for when they need an anchoring adhesive with documented performance instead of a generic construction adhesive trying to do a structural job it was never meant for.

The cartridge is manufactured in the USA using global materials. The included nozzle helps keep the product ready for use out of the package, and the format is familiar for pros already working with adhesive anchoring systems. This is not a general glue for random bonding tasks. It is purpose-built for fastening steel into mineral base materials where bond strength, hole conditions, and curing behavior all matter.

Who should buy it? Concrete contractors, structural retrofit crews, masons, general contractors, and serious remodelers doing code-driven anchoring work. If your job involves threaded rod, rebar dowels, cracked concrete, or cold-weather anchor installation, Simpson Strong-Tie AT-XP 12.5-oz. High-Strength Acrylic Anchoring Adhesive Cartridge w/ Nozzle is a strong fit. If you just need a light-duty adhesive for basic repairs, this is more specialized than you need. But for real anchoring work, that specialization is exactly the point.

Simpson Strong-Tie AT-XP 12.5-oz. High-Strength Acrylic Anchoring Adhesive Cartridge w/ Nozzle Gets the Job Done When Conditions Are Not Ideal

This is the kind of anchoring adhesive you buy because the install actually matters and the weather is not going to wait for you.

• Who it's for: Contractors and serious users setting threaded rod or rebar in concrete or masonry, especially on repair, retrofit, and structural fastening work.
• Why it stands out: Cold-weather dispensing without warming the cartridge, a wide service temperature range, and documented performance for cracked concrete applications give it real jobsite value.
• Worth knowing: This is a specialized anchoring product, not a general-purpose glue. Use it where an approved adhesive anchor system is called for and pay attention to the installation requirements for the specific application.

• What is this product used for? It is used to anchor threaded rod and rebar into cracked and uncracked concrete and into uncracked masonry.
• Can it be used in cold weather? Yes. Simpson Strong-Tie states it dispenses easily in cold or warm environments and can be installed at substrate temperatures from 14°F to 100°F.
• Is it suitable for seismic applications? Yes. The product data states it is suitable for static and seismic loading conditions in the approved base materials.
• What temperature range can it handle after installation? Its in-service temperature range is rated from -40°F to 180°F.