[ID] 21 [Sculpture Tech] Polyurethane Resins [Inhalation Haz] Isocyanates extremely. toxic; amines moderately; fluorocarbons slightly toxic [Other Hazards] Heating releases haz. solvents; dust irritant to skin & respiratory system [Precautions] Don't use them if you have respiratory problems; use spray booth, respirator; wear gloves, goggles [Skin Contact Haz] 
Amines moderately toxic; organotin highly toxic