The SDS sheets for all of the HCT products were updated in depth and detailed. http://www.hybridcoatingtech.com/msds-forms.html Furthermore, the Part B looks to be the hardener or has the hardener "raw materials" in it. This is the list of all the HNIPU hardeners Uramine 5851 Uramine 4761 Uramine-FC Uramine-LP Uramine-B Uramine-S http://www.hybridcoatingtech.com/hardeners.html example of one SDS.. URAMINE 5851, B-SIDE http://www.hybridcoatingtech.com/pdf/Uramine-5851-B-Side_SDS_PPL_for%20customers.pdf