Spray Bubble Check where you suspect. The escaping air lifts one bubble, right on the leak, in seconds.
A slow leak is invisible air leaving an invisible gap. Chasing it by feel burns a bay and earns a comeback.
Bead, valve, sidewall, TPMS. On the car or off.
One bubble lifts at the exact point air is leaving.
Fix the one thing that's failing. First time.
Foams on contact, before any air moves. The leak is just one bubble in a field of suds.
Low-foam. It lies flat until air pushes through, so the only bubble you see is the one that matters.
The pound-a-week leak before the comeback.
Test the seal in place. No dunking a sensor.
Corroded seams talk the second you spray.
Confirm the patch held before it leaves the bay.
A leak detector engineered for the bay, not borrowed from the dish sink. Spray it, read it, wipe it, next wheel.
Straight talk: yes, it is water and a surfactant, same as every leak detector worth using. The engineering is in the foam control, so it points at the leak instead of burying it.
The largest independent tire retailer in the country runs it in their bays, because a line keeps moving when the leak stops hiding.
