No one has mentioned this yet, but after looking at the chemical structures my guess is that people who are allergic to poison oak, or posison ivy (catchol compounds) will also have strong allergenic reactions to the Epoxy Part A. Are those of you who are sensitive very allergic to poison oak? This would also explain whly over time some individuals develop allergic-like reactions while others do not.

Lastly, onece the expoy has cured there should be no sturcture similarity. SO I presume the allergenic response is specific to the Part A and not to the cured glass.

: The following was added to my web site. It is now my current view of the
: proper use of System 3 epoxy. I will not object to it again.

: A different view was given by System 3, an epoxy formulator. On the second
: point only: You should have "adequate ventilation".

: A closed garage is sufficient.

: A respirator is not needed.