AC500 V4 Epoxy Adhesive

Injectable epoxy chemical anchor with European ETA1 approval — for cracked concrete, seismic loads, diamond drilling and underwater installation.

ETA1 — Cracked concreteSeismic C1-C2Underwater applicationDiamond drillingFire rating R120Post-installed rebar

The Adit chemical anchor family

Choose the right adhesive for your load, substrate and approval requirements.

AC500Epoxy · ETA1 · Cracked concrete · Underwater Chemfix100Epoxy · ETA1 · Shock · Green certification Chemfix200Hybrid · ETA + ESR · Potable water CT50ProPolyester · ETA7 · Concrete & blocks PESF TOPPolyester · ETA7 · Caulking gun Hollow BlocksSleeves & mesh for anchoring in block

Technical specification

Property	AC500 V4 — pure epoxy, European approval
Adhesive type	Advanced epoxy
Technology	Injectable chemical anchoring
Cracked concrete	Yes — tension zone approved
Seismic	Yes — C1 and C2 for threaded rods · C1 for rebar
Underwater application	Yes — including wet holes and subsea installation
Diamond drilling	Yes
Fire rating	Yes — classification R120
Wind & dynamic loads	Yes
Working life	100 years
Cartridge size	585 ml
Approvals	European ETA 23-0553 · CE

Downloads

Instructional & field-test videos

Epoxy chemical anchors for fastening: the complete guide

Everything you need to know about using a chemical anchor or professional epoxy adhesive for anchoring rebar and bolts — from the engineering principle, through the field installation steps, all the way to the largest infrastructure projects in Israel. This guide was written by the experts at Adit Ltd., the leading and largest chemical-anchor company in Israel.

What is an epoxy chemical anchor and how does it work?

A chemical anchor based on pure epoxy is a two-component engineering adhesive — an epoxy resin and a dedicated hardener — designed to anchor rebar dowels, threaded rods, dowels and studs under exceptionally high loads in concrete, natural stone, brick and solid building materials.

When the components are mixed in the mixer nozzle, an advanced chemical reaction (polymerization) begins, producing an exceptionally rigid three-dimensional polymer structure. Unlike simple mechanical anchors that apply point pressure on the concrete walls, an epoxy chemical anchor such as ADIT AC500 V4 forms a perfect, integral chemical bond with the pores of the drilled hole — delivering unprecedented resistance to shear, tension, pull-out and constant vibration.

The bonding principle:

The molecules of the epoxy chemical anchor penetrate into the micro-cracks and natural pores of the concrete. After curing and hardening, they form a single homogeneous unit with the structure, without creating internal expansion stresses.

Installation stages for chemical anchoring of rebar dowels and bolts

Drilling — drill a hole to the required diameter and depth per the structural engineer’s instructions and the manufacturer’s tables, matched to the diameter of the threaded rod or rebar. AC500 V4 is also approved for use with diamond core drilling.
Cleaning the hole (mandatory step!) — thoroughly clean the hole with a dedicated wire brush and blow the dust out with compressed air. Poor cleaning is the number-one cause of chemical-anchor failure in the field, because the adhesive would bond to the dust instead of the concrete.
Injecting the chemical — inject the adhesive from the back of the hole upward (filling about 2/3 of the hole volume) to prevent air pockets.
Inserting the rod / rebar — insert the rod or rebar with a slow, gentle rotating motion that ensures full chemical coverage around all the steel ribs.
Curing time — wait fully for the material to harden according to the substrate temperature (8-12 hours to full cure at room temperature per the manufacturer’s data). Do not apply any load or torque at this stage.

Advantages of a pure epoxy chemical anchor (ADIT AC500 V4)

For demanding engineering projects, a pure epoxy chemical anchor such as ADIT AC500 V4 (supplied in 585 ml cartridges) offers superior advantages over simple polyester adhesives and even hybrid vinylester systems:

Maximum structural strength and service life: among the highest load-bearing values in the anchoring world, approved for a 100-year working life.
Advanced seismic resistance: AC500 V4 holds C1 and C2 approval for threaded rods and C1 approval for rebar dowels. No C2 approval for rebar dowels yet exists anywhere in the world, so C1 is the highest level currently achievable in the reinforcement field.
Full resistance to chemicals and moisture: approved for wet holes and even underwater applications.
No creep: the polymer stays stable and does not deform under constant, sustained loads — critical for structural connections.
Suitable for cracked concrete: distributes stresses widely and evenly (tension zone approved) without creating splitting pressure, allowing safe work close to edge distances.
Fire resistance: high fire resistance with classification R120.
International standards and approvals: carries rigorous CE and ETA approvals (ETA 23-0553) and is approved by leading design offices and engineers in Israel.

Proven performance in Israel’s largest projects

The ADIT AC500 V4 chemical anchor has proven its reliability across thousands of construction sites and complex projects in Israel and worldwide. Its high grip level — enabling anchoring of rods and rebar up to 32 mm diameter and above — durability in harsh environmental conditions, approval for wind loads and standards compliance have made it the preferred choice for tunnels, high-rise buildings, logistics centres, underground car parks and bridges.

Durability in port and underwater environments

Installing bolts and rods in marine and subsea structures requires an anchoring solution that can cope with high water pressure, extreme salinity and constant vibration. AC500 V4, which holds a dedicated underwater approval, has demonstrated perfect durability in port projects in Israel, confirming it is a leading critical product for edge loads.

Why choose Adit Ltd. for your chemical anchor?

In the anchoring and construction field, choosing a professional supplier is just as important as choosing the material itself. Adit Ltd. — the leading and largest company in Israel for anchors and chemical-anchor solutions — provides full engineering support: professional consulting for load calculations, direct on-site guidance, fast supply from stock (including dedicated 585 ml injection guns) and competitive prices for projects of any scale.

Frequently asked questions

What is the difference between AC500 and Chemfix100?

Both are epoxy adhesives with ETA1 for cracked concrete and C1-C2 seismic approval. Chemfix100 adds approval for Shock loads and green EPD/LEED certification, and has been extensively tested in Israel. AC500 V4 is the choice when underwater installation or diamond drilling is required.

What is the difference between an epoxy chemical anchor and a polyester chemical anchor?

A pure epoxy chemical anchor (like AC500 V4) is designed for the highest structural loads, completely prevents creep and withstands extreme wet and industrial environments. Polyester is a more economical, simpler solution for light to medium loads (such as anchoring in blocks), but it is more sensitive to prolonged moisture and tends to creep under heavy, constant stress.

Why use a chemical anchor for rebar dowels in concrete?

Installing rebar dowels is intended for extending structures, adding floors or connecting new cast elements to old ones. A chemical anchor for rebar (pure epoxy) ensures an especially strong bond between the steel and the existing concrete. Because the epoxy does not shrink during hardening, it creates optimal stress transfer — reflected in pull-out and shear loads of tens to hundreds of kilonewtons for large rebar — and allows the new element to behave together with the old one as a single cast body.

How long does the epoxy chemical anchor take to cure before it can be loaded?

The curing time of a pure epoxy adhesive is longer than that of fast adhesives, to allow deep penetration into the concrete pores. On average, at a comfortable working temperature, AC500 V4 requires 8-12 hours to full cure (diamond core-drilled holes may require additional time). Adit’s experts will provide detailed timing tables according to the season and field conditions.

Can it be injected into a wet hole or underwater?

Yes. AC500 V4 holds official approvals for work in wet holes and even full underwater application — not only for a damp hole, but also below the water surface. The advanced formula hardens in a marine environment without losing its structural grip strength.

Is the epoxy chemical anchor earthquake-resistant?

Yes. For threaded rods, AC500 V4 is approved for both category C1 and C2, intended for particularly high seismic loads. For rebar dowels, the system is approved for category C1, as seismic C2 approval for rebar does not currently exist from any manufacturer worldwide, so C1 is the highest level in this field.

What is diamond drilling and why does it matter?

Diamond drilling creates a hole with especially smooth walls that lack the roughness the adhesive grips onto. Most chemical adhesives lose a significant part of their grip strength in such a hole. AC500 V4 is explicitly approved for diamond drilling.

Is it suitable for cracked concrete?

Yes. AC500 V4 is approved for use in tension-zone (cracked concrete) areas. The chemical formula can bridge micro-cracks that develop in the structure without losing load capacity, ensuring the anchor remains stable over time.

Why are brushing and cleaning the hole so critical?

During drilling, a large amount of fine dust sticks to the hole walls. If the chemical anchor is injected without cleaning, it bonds to the dust layer rather than the solid concrete, reducing load capacity by tens of percent and causing rapid pull-out. Use compressed air and a brush per the installation instructions (clean twice from each direction) to ensure bonding quality.

Anchoring in tough conditions? Tell us the drilling type, hole condition and load — our engineers will recommend the right adhesive and send you the ETA data.

Talk to our engineers