I watched a video on YouTube of a guy who was a transmission mechanic and he suggested only putting it on the pan side because it's a pain to clean off of the block if it needs replaced again. I can't decide if I want to heed that advice or put it on both sides to ensure a good seal.I used it on both sides. Its pretty messy! have fun with it haha. I put the FIPG on the block first then lined the gasket up and laid it down. then put FIPG on the gasket then carefully put the pan on. used a screwdriver to line up holes to put bolts in. I think I will have to torque a little more down when the cork gasket compresses more. my tip is to have a rag ready and wear gloves. I put a little extra FIPG in the arch corners because thats where they always seem to start leaking. at least thats where my 3fe had issues leaking so much so It looked like the rear main. Ohh and just get an OEM gasket. the aftermarket one that came with my gasket kit was crap did not align with the bolt holes and was the annoying 4 piece gasket.
I have tubes of FIPG and used it to make a gasket on my steering box. You definitely have to be careful not to get it all over the place!