not specifically for blisters - though it might work for that - but I use GoldBond Friction Defense to prevent chafing on the inside of my thighs at Coachella and it works WONDERS with no side effects. https://www.amazon.com/Gold-Bond-Friction-Defense-Unscented/dp/B00HA775SQ/ref=sr_1_1_a_it?ie=UTF8&qid=1489446396&sr=8-1&keywords=gold+bond+stick