Geoff - I'm sorry to hear of your sensitization experience. Have you tried using any of the 2-part putties with nitrile rubber gloves and a respirator+some good dilution ventilation? If not, FIRST, ask your doctor if it is OK for you to "test the waters", then I can help you select gloves and a respirator, explain what cartridge to use, how to fit the respirator, etc. If you have already tried that and it didn't work, all you can do is just avoid, avoid, avoid.
You ask a very good question about the 2 part resins and I'd be happy to research it for the PF members but need you to tell me the products you are using. Please be as specific as possible, brand, product name, product number, etc., etc. Formulations of proprietary trademarked products are closely-guarded for obvious reasons, but since I'm in the nominal "health care" industry I can usually find out what I need to know. If any of you want to contact me directly, that's fine and I'll respect your privacy, etc.
All the best,
Dan