Epoxy resin allergy
Contact allergy and asthma from epoxy resins and hardeners.
About epoxy resin allergy
Epoxy systems combine a resin (commonly based on bisphenol A) with a hardener, and are widely used in adhesives, coatings, paints, flooring, laminates and composites. Uncured epoxy resin is a potent skin sensitiser, so repeated contact can cause allergic contact dermatitis, while some hardeners, particularly certain amines and acid anhydrides, can also sensitise the airways and cause occupational asthma. Painters, floor layers, boat and wind-turbine builders, electricians and workers handling composites and adhesives are among those commonly affected.
Sensitisation develops over repeated exposures before symptoms appear. Skin reactions typically show as itchy, red, swollen, cracked or blistered patches on the hands, forearms and face, sometimes spreading via airborne dust or vapour. Where the airways are involved, workers may notice a runny or blocked nose, cough, chest tightness and wheeze that can begin minutes to hours after exposure. As with other occupational allergies, symptoms often ease during weekends and holidays and return on going back to work.
Diagnosis is usually arranged through occupational health, with patch testing for skin allergy and specific-IgE or lung-function testing where asthma is suspected. Management focuses on reducing exposure: substituting less-sensitising products where possible, enclosing processes, improving ventilation, and using suitable protective gloves and clothing, remembering that ordinary gloves may not resist penetration. Confirmed occupational asthma or dermatitis may be reportable under RIDDOR. Because continued exposure can worsen and prolong the condition, early assessment and control are essential.
Common triggers
- Epoxy resin and products containing it
Symptoms
- Skin rash or dermatitis on exposed areas
- Sneezing, runny nose or watery eyes
- Coughing, wheezing or chest tightness
- Occupational asthma over time
Avoidance & management
- Use recommended protective equipment and ventilation
- Follow workplace exposure controls
- Wash exposed skin promptly
- Report symptoms to occupational health
- Discuss adjustments or alternatives with your employer
Sources & references
Allergy safety: what everyone should know
Mild-to-moderate reaction signs
- Itching, hives or a raised rash
- Swelling of lips, face or eyes
- Tingling mouth, sneezing, runny nose
- Stomach pain, nausea or vomiting
Anaphylaxis — call 999 (UK) or 112 (EU) immediately
- Difficult or noisy breathing, wheeze, persistent cough
- Swelling of the tongue or tightness in the throat
- Dizziness, collapse, pale and floppy (young children)
- Use an adrenaline auto-injector (e.g. EpiPen) at once if prescribed, then call an ambulance even if symptoms improve
Allergy or intolerance? A true allergy involves the immune system and can escalate quickly; an intolerance (e.g. lactose intolerance) is unpleasant but not life-threatening. The symptoms overlap, so self-diagnosis is unreliable.
Getting tested: home-testing kits based on IgG are not diagnostically valid. If you suspect an allergy, ask a GP for referral to an allergy clinic for skin-prick or specific-IgE testing and a supervised food challenge where appropriate.