DHS No. 15 is very good, however if you're in a very dry environment, it can dry quickly and clump up if you're slow at spreading it, or don't use enough.
Worst I've tried is Stiga Bond Glue, it's easier to apply than DHS No. 15, but it hardens so much and digs into the sponge, it's almost impossible to remove again without damaging the sponge, atleast for hybrid rubbers that is.
Worst I've tried is Stiga Bond Glue, it's easier to apply than DHS No. 15, but it hardens so much and digs into the sponge, it's almost impossible to remove again without damaging the sponge, atleast for hybrid rubbers that is.