Tubeless sealant leaks in the rain Whenever I cycle in heavy rain with my tubeless tires, what I presume is the sealant seeps out of the rims in a kind of gloopy dark-grey mush. Is there something wrong with the sealant I'm using? Or perhaps compatibility between the tires / sealant / wheel?
I heard a moderately loud pop when when I set up the tires and they appear to be seated correctly.
Using gravelking foldable tubeless ready 35mm tires with Orange Seal sealant.
I don't know what the association would be with rain, but sealant coming from random spots on the rim but not the bead lock area implies a tape problem. If it's happening at the bead itself (the joint between tire and rim), too narrow tape could be a cause.
The loud pop is normal and is a good thing. The first thing to double check would be a consistent lock all the way around.
Orange works well with all the light Panaracer or Panaracer-made tires, so no this does not sound like a compatibility problem.
If you got a puncture (which is potentially likelier in the rain) and some sealant escaped in the process of sealing, you could get something like this, collecting at the rim in a way that suggests that's the leak, but it's not. The same is true if there was a puncture that the sealant wasn't quite able to fill. But that probably wouldn't be both tires, all the time.
Light tires like this can have a way of &quot;eating&quot; a higher amount of sealant in initial riding, and until then can lose some through the casing. It's possible this is what you're seeing. You can test that easily by using a 2mm allen or other small thin tool as a dipstick through the valve, and then re-upping as needed if there's little or no free liquid. Clean the tire off before riding so you have a fresh start. If that doesn't work then I think looking at the tape is probably the next thing, unless you're just losing it from punctures.