reviewed by:
int...@gm...x.comI've been using protect'air for several years now. You do have to add more after two years to keep the sealing capability. That's a lot less frequent than latex based sealant. I've never had a flat using it, so it must be doing its job. I add it by unseating part of the tire and pouring about half a bottle in. Pretty easy.
I also carry a fast'air, but have not had to use it.