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September 23 - September 27, 2019

What health and safety precautions should contractors take when applying isocyanate-cured epoxies in the field?


Selected Answers

From Alexandre Racine of Gatx Rail Canada on October 1, 2019:
I totally agree with Michael's comments. I would add that the breathing apparatus, if in an enclosed place, would need adduction air. Isocyanate particulates are detectable at 0.005 ppm, for which  regular carbon cartridges with dust filters are not suitable. Field application may include tanks, bridges and all the structures that are tarped to prevent fumes and deposits on surroundings.

From Michael Halliwell of Thurber Engineering Ltd. on September 27, 2019:
I'm not seeing any responses to this one yet, so I'll take a stab at it and see if we can't generate some more comments. Although I am not an expert (by any stretch) on epoxy coatings, I think the basics of resins and isocyanate apply: Protect those working with the material from dermal and eye exposure, inhalation and ingestion. Realistically, for dermal I would assume this means solvent-resistant gloves and clothing appropriate to the application method...if spraying, it may mean solvent-resistant coveralls; if rolling, it may mean boots, gloves, sleeves or coveralls, depending on the location and where contact with the worker may occur. For inhalation, a respirator with a protection factor suitable to the airborne levels, as applicable...when in doubt, go for more protection rather than less. Eye protection may be tight fitting eyewear / goggles up to the protective shield of a full face respirator or spray hood. Ingestion is a bit easier....before eating, the solvent- resistant stuff comes off and they wash up.

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Tagged categories: Coating Application; Epoxy; Health and safety; Isocyanate


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