Anchors/1/2" Epoxy Adhesive Anchor

Epoxy Anchor

1/2" Epoxy Adhesive Anchor

Quick Answer

A 1/2" Epoxy Anchor needs a 5/8" pilot hole, drilled to 4-1/2" minimum (9× diameter), with 4-1/2" minimum embedment, torqued to 40 ft-lbs (after cure).

Pilot Hole

5/8"

Embedment

4-1/2" minimum

Torque

40 ft-lbs (after cure)

Safe Load

Where to Buy

Code-listed

SET-3G High-Strength Epoxy Anchoring Adhesive, 8.5 oz Cartridge

ICC-ES ESR-4057 · cracked + uncracked · seismic A-F

★ 4.2 (20)Code-listed

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Budget pick

Quickmast AE15 Concrete Epoxy for Rebar and Rods, 10.1 fl oz

Epoxy acrylate · 10.1 fl oz · 4-10 min work time

★ 4.6 (175)

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As an Amazon Associate, BuildToolHQ earns from qualifying purchases. Specifications are for guidance only — always verify against the anchor manufacturer's ICC-ES ESR report and local building codes.

Full Specification

Type

Epoxy Anchor

Diameter

1/2"

Available Lengths

Threaded rod cut to length

Pilot Hole Diameter

5/8"

Pilot Hole Depth

4-1/2" minimum (9× diameter)

Embedment Depth

4-1/2" minimum

Recommended Torque

40 ft-lbs (after cure)

Compatible Substrates

Solid concrete, Cracked concrete, Hollow block (with screen tube), Brick, Stone

Load Rating

8,000+ lbs (tension) at full embedment in 4000 psi concrete

Material

Epoxy adhesive + A307 or A193 threaded rod

Removable

No — permanent installation

Best For

✓Cracked concrete (ICC-ES approved systems)
✓Rebar doweling
✓Seismic zones
✓Post-installed anchors where mechanical won't work
✓Hollow block with screen tube

Not For

✗Green or wet concrete (check cure time)
✗Temperatures below 40°F without cold-weather epoxy
✗Fire-rated applications without tested system

How a Epoxy Anchor Grips

An epoxy anchor bonds a threaded rod to the base material chemically rather than mechanically, transferring load through the full surface of the drilled hole. Cure time matters: loading the rod before the adhesive reaches full cure is the most common cause of failure.

Installation Tips

1.Hole must be oversized: 5/8" hole for 1/2" rod (25% larger than rod diameter)

2.Blow hole clean with compressed air, then brush, then blow again — 3-step cleaning is mandatory

3.Inject epoxy from the bottom of the hole — work upward to prevent voids

4.Do not load the anchor until epoxy has fully cured — gel time varies by temperature

5.Use ICC-ES approved epoxy systems for code-required structural applications

Frequently Asked Questions

What size drill bit does a 1/2" Epoxy Anchor need?

Use a 5/8" carbide masonry bit, drilled to 4-1/2" minimum (9× diameter).

How much weight can a 1/2" Epoxy Anchor hold?

8,000+ lbs (tension) at full embedment in 4000 psi concrete. Actual capacity depends on base material strength and embedment — verify against the manufacturer's ICC-ES ESR data for structural work.