Good thread. I too use the Pro-Bond PolyU glue sheeting and love the stuff. I also work in a PolyUrethane Foam Mfg Plant, and the hazards of isocyanates are nothing to take lightly. I believe from the color and reading the label that the ProBond uses an MDI (diisocyanate) based catalyst package. It is a little sneakier in that it doesn't present a real foul odor and you can get a good dose of it without really noticing it.

We use mostly TDI here and that stuff is super nasty. Evaporates wildly at room temperature and burns the nose like ammonia if you get a good whiff of it.

As mentioned above, people get sensitised to the stuff. And the degree of sensitivity with onset of problems varies wildy from person to person. We constanly monitor the plant and maintain a less than 5ppb level in the plant atmosphere. But someone like Tommie might even have problems with that level. Our maintenance and proccess techs used forced air ventilation hoods when dealing with the stuff. It's really the best way to avoid exposure.