Epoxy Crack Injection JHA (Job Hazard Analysis / Activity Hazard Analysis)
Updated 2026-06-23
An Epoxy Crack Injection JHA (Job Hazard Analysis / Activity Hazard Analysis) is the plan that keeps the crew injecting epoxy into concrete cracks from being sensitized by the epoxy, injured by the high-pressure injection equipment, or overcome by vapors in the confined spaces where the work often happens. Epoxy crack injection repairs cracked concrete by injecting epoxy resin under pressure to fill and bond the crack — a process combining epoxy's sensitization hazard with high-pressure injection equipment. This guide walks through building an Epoxy Crack Injection JHA that names the chemical-sensitizer, high-pressure, and confined-space hazards and assigns the PPE, injection-equipment, and ventilation controls that hold up in the field.
Why epoxy crack injection needs its own JHA
Epoxy crack injection structurally repairs cracks in concrete by installing injection ports along the crack, sealing the crack surface, and injecting two-part epoxy resin under pressure to penetrate and bond the crack full-depth. The hazards center on the epoxy and the injection. The epoxy resin and its hardener are skin and respiratory sensitizers (and the hardeners often corrosive), and the work involves close handling of these chemicals. The injection equipment operates under pressure, creating high-pressure injection-injury hazards (epoxy injected into the body under pressure is a serious medical emergency) and the risk of the pressurized epoxy spraying if a port or seal fails. The work is often in confined spaces, basements, and below-grade areas where vapors concentrate. The combination justifies a dedicated JHA.
Breaking epoxy crack injection into steps
The steps for an Epoxy Crack Injection JHA follow the injection:
- Assess the crack and confirm the repair approach
- Install injection ports and seal the crack surface
- Set up the injection equipment and mix the epoxy
- Don chemical PPE and respiratory protection
- Inject the epoxy under pressure
- Manage the high-pressure equipment and injection hazard
- Manage vapors in confined and below-grade spaces
- Remove ports and finish
Each step carries a hazard, and the epoxy handling (sensitization) and the high-pressure injection are where the most serious risks concentrate.
The hazards step by step
Epoxy sensitization and chemical exposure
The epoxy resin and hardener are skin and respiratory sensitizers — exposure can cause allergic contact dermatitis and respiratory sensitization, and once sensitized, a worker reacts to even small future exposures — and the hardeners are often corrosive. The controls are chemical-resistant gloves and protective clothing, eye protection, respiratory protection for vapors, careful mixing and handling to avoid skin contact and splashes, and washing exposed skin. Preventing sensitization is the key health goal, as it is often permanent. (These follow the epoxy-flooring fundamentals.)
High-pressure injection injury
The injection equipment forces epoxy into the crack under pressure, and a high-pressure injection injury — epoxy or the injection tip forced into the body — is a serious medical emergency that can appear minor initially but cause severe tissue damage. The pressurized epoxy can also spray if a port or surface seal fails. The controls are keeping hands and body away from the injection tip and ports under pressure, never placing a body part in front of the injection point, eye and face protection against spray, controlled pressure, and recognizing that any suspected injection injury requires immediate medical attention.
Vapors in confined and below-grade spaces
Epoxy crack injection is often done in basements, below-grade structures, tanks, and confined spaces where the epoxy vapors concentrate. The controls are ventilation, respiratory protection, monitoring where needed, and confined-space entry procedures where the definition is met, with the vapor hazard amplified in the enclosed space.
Equipment and access hazards
The injection equipment, hoses, and the work locations (at height, in tight spaces) add their hazards. The controls are inspecting the equipment and hoses, safe access, and the relevant fall and confined-space controls.
A simple Epoxy Crack Injection JHA structure
| Step | Hazard | Control | Standard |
|---|---|---|---|
| Mix epoxy | Sensitization / corrosive | Chemical PPE, eye protection, avoid skin contact | OSHA 1926.59 |
| Inject under pressure | Injection injury | Hands/body clear of tip and ports, face protection | OSHA 1926.95 |
| Manage pressure | Spray / injection | Controlled pressure, inspect ports and seals | manufacturer |
| Work in confined/below-grade | Concentrated vapor | Ventilation, respirator, confined-space entry | OSHA 1926.1203 |
| Handle equipment | Equipment failure | Inspect equipment and hoses, safe operation | OSHA 1926.302 |
| Suspected injection injury | Severe tissue damage | Immediate medical attention, treat as emergency | medical protocol |
Sensitization prevention and the injection hazard
An Epoxy Crack Injection JHA centers on preventing sensitization and controlling the high-pressure injection hazard. The sensitization prevention is the key health control — the epoxy resin and hardener are sensitizers, and sensitization is often permanent, so chemical PPE and careful handling to prevent skin contact and inhalation protect the worker's long-term health. The injection hazard is the acute control — the high-pressure injection equipment can force epoxy into the body, a serious medical emergency, so hands and body stay clear of the injection tip and ports under pressure, and any suspected injection injury gets immediate medical attention. A JHA built on sensitization prevention and injection-hazard control, with ventilation for the confined spaces where the work often happens, addresses the hazards that define epoxy crack injection.
From the field: what actually goes wrong
In fourteen years across federal, heavy civil, and industrial projects, epoxy crack injection combines two hazards that demand respect: the epoxy sensitization and the high-pressure injection. The sensitization is the same hazard as epoxy flooring but in close, hands-on work — the resin and hardener are sensitizers, and a worker who repeatedly gets epoxy on their skin or breathes the vapors can become permanently sensitized, after which even small future exposures cause reactions. The control is chemical-resistant PPE, careful handling to avoid skin contact, and respiratory protection for the vapors. This is hands-on chemical work, so the PPE discipline matters.
The high-pressure injection is the acute hazard people underestimate. The equipment forces epoxy into the crack under pressure, and a high-pressure injection injury — epoxy or the tip driven into a finger or hand — is a serious medical emergency that can look minor at first but cause severe tissue damage requiring surgery. The control is keeping hands and body clear of the injection tip and ports while under pressure, never putting a body part in front of the injection point, and face protection against spray if a port or seal fails. Any suspected injection injury is treated as an emergency needing immediate medical attention. The confined and below-grade spaces where this work often happens amplify the vapor hazard. The JHA that prevents sensitization and controls the injection hazard is the one that protects the crack-injection crew.
The bottom line
An Epoxy Crack Injection JHA names the chemical-sensitizer, the high-pressure, and the confined-space hazards with specific controls — chemical PPE and careful handling to prevent the often-permanent sensitization, keeping the body clear of the high-pressure injection tip with immediate medical attention for any injection injury, and ventilation and confined-space procedures for the enclosed spaces. The epoxy sensitization and the injection hazard are the defining risks. The JHA that manages both is the one that protects the crew.
Frequently asked questions
Why is epoxy a sensitization hazard?
The epoxy resin and hardener used in crack injection are skin and respiratory sensitizers — exposure can cause allergic contact dermatitis and respiratory sensitization, and once sensitized, a worker reacts to even small future exposures, often permanently. Chemical-resistant PPE, careful handling to avoid skin contact, and respiratory protection for vapors prevent it.
What is a high-pressure injection injury?
A high-pressure injection injury occurs when the injection equipment forces epoxy or the injection tip into the body under pressure — a serious medical emergency that can appear minor initially but cause severe tissue damage requiring surgery. Controls are keeping hands and body clear of the injection tip and ports under pressure, never placing a body part in front of the injection point, and immediate medical attention for any suspected injection injury.
Why is confined-space exposure a concern?
Epoxy crack injection is often done in basements, below-grade structures, tanks, and confined spaces where the epoxy vapors concentrate. Controls are ventilation, respiratory protection, monitoring where needed, and confined-space entry procedures where the definition is met, with the vapor hazard amplified in the enclosed space.
Can pressurized epoxy spray during injection?
Yes. If an injection port or surface seal fails, the pressurized epoxy can spray, so eye and face protection are worn, the ports and seals are inspected, and the pressure is controlled. A spray of epoxy is both a skin/eye exposure and a sensitization risk.
Related JHAs
- Concrete Repair JHA — broader concrete repair methods
- Epoxy Flooring Installation JHA — epoxy sensitization fundamentals
- Structural Grouting JHA — related injection and grouting
- Confined Space Entry JHA — injection in confined and below-grade spaces
Written by Mustafa Tok, CSP, ASP, CHST — OSHA Authorized Outreach Trainer with 14+ years of international construction safety experience across federal, heavy civil, and industrial projects.