westend wrote:
After the bead is applied, you can use a spoon or your finger to smooth the caulk back into the joint. A spoon is easier for rookies and if you keep it in a small container with water, it will make the bead as smooth as glass.
Good technique but if you do this with ProFlex it will drag, separate and you will ruin what was a good caulk joint. The manufacturer recommends using mineral spirits instead of water and I can tell you they are not joking. You need to dip your finger in mineral spirits, NOT WATER, if you are smoothing a ProFlex joint.
I have also found that dipping my finger in Goop mechanic's hand soap works too. :)
To the OP: If bubbles are forming in fresh ProFlex, you may have water behind the joint. Water may be coming in elsewhere and attempting to run out the of the joint you just caulked. Check carefully before you repair, since adding more ProFlex will just do a better job of keeping water in if there is any.