wayne, eternabond is a tape like sealing system that takes one person to put it on and six men and a boy to remove it. And, yes, it can be used on a rubber roof. About $48 a roll, but worth it, if you need it. I've sealed holes in metal roofs, and tears in rubber roofs. But as stated, it's very hard to remove without a heat gun.
Kool Seal is an elastimeric (sp) seal coat that is SPECIFIC for roof type. formulated for metal OR rubber roofs. I do my roofs (one metal, one rubber) every other year
2703 Tow Lite
Bonita Springs, Fl. &