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Without the isocyanate you don't have urethane. The MSDS is for Part A only. Part B, the catalyst, has the diisocyanate in it. -Chuck

First let me say, that urethanes do some beautiful things. Real CARC just looks so right on these trucks... way better than the pretenders... It is definitely worth being able to use the paint safely. I was in discussion with another member that works with those that routinely paint with...

Just to add to the information: I was over at WR Grace's site, and they claim that although the NIOSH/MHSA organic respirator cartridges are not approved for isocyanate exposure, they do work very well for individuals that are not already hypersensitive to isocyanates. The problem that...

I'm not trying to raise a ruckus, or tell anyone what to do. I am trying to find out some information. I already know exactly what isocyanates are, and what they do. I got told the entire story from a first hand participant in the world's first mass isocyanate exposure problem, over at WR...

I still can't find the MSDS for the catalyst (93V502). It is the important part, as it is where the isocyanates would exist. -Chuck

No, I hope not. I am very impressed with the job this waterborne CARC does, and I would like to use it... but I am having trouble finding the necessary information to determine what is necessary to use it safely... Since you bought the product, if Sherwin Williams did their job, you should have...

Isocyanate is a gas, not a volatile organic compound. It is a component of the urethane hardener, as I recall. EPA worries about photo chemical smog. VOC components contribute to photo chemical smog, so they have been heavily regulated out of paints... hence the water based paints, and...

What did Sherwin Williams say about isocyanates, and your respirator system? It is my understanding that water borne is just as bad that way as solvent borne CARC. -Chuck