Is epoxy resin safe? Ventilation, gloves, respirators and skin sensitisation

TUREFF• •0

Resin art is popular, accessible and beautiful, and the products sold for it are designed for home use. But uncured resin and hardener are chemicals that can harm your health, especially with repeated exposure. The good news is that the precautions are straightforward. The bad news is that the most common problem, skin sensitisation, is permanent once it happens, so it is worth getting the habits right from the very first pour.

Skin sensitisation: the main risk

Many epoxy resins and hardeners carry the hazard statement "May cause an allergic skin reaction" on the label. This is sensitisation: repeated skin contact can train your immune system to react to the chemicals. Some people can use resin carelessly for months or years before it happens; others react much sooner. Once you are sensitised:

even small exposures, including vapours for some people, can trigger a rash, itching, swelling or blistering
the allergy does not usually go away
some people have to give up working with epoxy altogether

The way to prevent it is to keep uncured resin and hardener off your skin, every time.

Gloves

Wear nitrile gloves whenever you handle uncured resin or hardener, or anything still wet with it. Latex and thin vinyl gloves are generally not recommended.
Change gloves straight away if they tear or get heavily coated.
Take gloves off by peeling them inside out, so the outside never touches your skin.
For long sessions or larger projects, check the manufacturer's safety data sheet (SDS); it states which glove material is suitable, and some recommend heavier gloves such as butyl or neoprene.
Wear long sleeves and protect your forearms; resin often ends up on wrists.

If resin gets on your skin, wash it off promptly with soap and water. Do not use solvents such as acetone or alcohol on skin: they can help the chemicals penetrate and dry the skin out, making sensitisation more likely.

Eye protection

Wear safety glasses or goggles when mixing and pouring. If resin gets in your eyes, rinse with plenty of running water for at least 15 minutes and get medical advice.

Ventilation

Epoxy vapours are usually much less intense than those of some other resins, but you should still work in a well-ventilated space:

Open windows and use a fan to move air out of the room, not just around it.
Avoid working in a small, closed room or a bedroom, and do not leave curing pieces where you sleep.
Heat increases vapour, so take extra care when using a torch or heat gun, or when a large pour warms up as it cures.
Keep children, pets and food out of the area.

Respirators

Check the SDS for your product. Many manufacturers recommend a respirator with organic vapour cartridges if ventilation is poor or you are doing larger or frequent pours. A simple dust mask does not filter vapours. Respirators need to fit properly to work, and cartridges need replacing as the manufacturer says.

Sanding cured resin

Fully cured resin is much less hazardous to touch, but sanding creates fine dust you should not breathe. Wear a dust mask or respirator with a particulate filter rated for fine dust, and wet sanding can reduce dust further. Resin that is not fully cured is still a skin hazard when sanded.

Food contact

Do not use resin pieces for food, drink or cutting boards unless the specific product is stated by its manufacturer to be suitable for food contact, and only in the way and after the cure time it specifies. Even then, such claims usually cover limited contact, not cutting on the surface: knives scratch it, and scratches trap food. Added pigments, glitter and inks may not be covered by the claim. Coasters and decorative trays are fine; a resin cheese board is a different matter.

Simple rules

Read the label and SDS before you start.
Gloves on, sleeves down, glasses on, windows open.
No eating, drinking or vaping at the workbench.
If you develop a rash, stop and review how you work, and see a doctor.

How do you set up your resin space safely? Share your tips and questions in the comments.