Yeah, how come all these experts in the videos are only wearing a filter mask or P100 canister cartridge?
The RHH foam system MSDS states the following for the more harmful A Component:
Use only in well ventilated areas. When atmospheric levels may exceed exposure guideline, use a approved air purifying respirator equipped with an organic vapor sorbent and a particle filter. In situations of insufficient ventilation, or in situations where the potential exists for exceeding the TLV, wear self-contained breathing apparatus.
Here is the link to their MSDS: http://www.rhhfoamsystems.com/pdf/msds_std.pdf
So to be safe I think Inspector Gadget is right, better wear a self contained breathing apparatus.