One of the topics I've been reading up on is sealants. I'm wanting to re-seal around windows/seams of an old converted bus. Looks aren't too important. from this forum there appears to be at least 3 suitable products; Sikaflex 221 Sikaflex ebt mastic on a roll. What the general consensus as to what would be best for me? I'm leaning towards the mastic on a roll, assuming that it is like plasticine and therefore nice and pliable and easy to push into nooks and crannies. Any/all opinions greatly appreciated. cheers, LG.