justin_o_guy2 wrote on 01/05/10 at 15:03:03:Deer brain will waterproof it. My kid wiped some on the sidewalk & that spot didnt get wet for almost a year. & it was right under where the water came down off the roof. Deer brain is used in tanning, too, So, if ya get some leather tanned that way, maybe its waterproof already?
BTW, it needs to be raw, not cooked.
I've worn brain-tanned leather (and helped make it), it's about the consistency of a chamois, and soaks up water just as good.
The oil in it is probably what made the water bead off the sidewalk, but the tanic acid(?) in it is why they use it for tanning, to break down the fibers a little, and make it softer. Probably wouldn't do much for the seat, but make it stink, and they DO stink!