Vince
The respirator I used was one from MSA Safety Works that has replaceble cartridges. I purchased it from Home Depot or Lowes. The respirator instructions also had a warning that stated "Do not use for urethane paints or other paints containing diisocyanates because of their poor warning properties. Use against such contaminants could result in severe permanent damage to the respiratory system. Use Air Supplied Respirators." In my case, when all else fails, I read the instructions. The only reason I posted this message was to let others benefit from my mistake.