Nasty looking. Ive always improvised with dough-style epoxy. To the point I always keep some in my vehicle/motorcycle b.o.b. had a good 12" split on the top of a radiator once...patched it with that, never did replace it, never leaked and lasted years. Also rippes out a drain plug on a motorcyle while 2up off road. Walked out, got oil, walked in and made a temporary plug out of the epoxy. Held until I could get it into a shop. The thought of trying to fix leaks by adding crap to the fluids is crazy though.