[Closed] Tubeless cores that don't get gunked up with sealant

I have never found ones that don't get some degree of gummage but it's rarely enough to wind me up. If I get a year from a valve that's ok against the cost of tubes I'd otherwise destroy.

My "testing" has so far included Mavic, Stans, Profile, Specialized and some no name ones, bits of old inner tube and ghetto tubeless strips with Schrader valves.

I think but am not sure that the answer might be to leave the valve at the bottom of the wheel pointing up when storing so sealant runs away from the valve rather than sitting in it.

I think the other thing is to open and ping them regularly and the ones where you can remove the core can be cleaned up pretty easily. At least if you pump up regularly it should blow sealant back into the tyre.

Also are you using CO2 as that can have an impact on some sealants? Slime always seemed ok with it but Stans and Decathlon sealants less so.

milKit valves are specifically designed to avoid getting gunked up with thier petal valve system, handy for checking sealant levels as well.

Removing valve core and spraying silicone on it helps.

Store your bike with the valves in the 6o’clock position.  In theory the sealant will not then pool in the valve and reduce the build up.

As said above, a tip I was given a few years ago by a WC mechanic was a blast of silicon spray on the valve.
Never had one stick since doing it.

They’re all pretty much the same in my experience. Removing them regularly and giving them a clean is all you can do really if they’re getting gunked up.

Weird ... never had this problem in all the years of tubeless use, maybe cos me sealant is all dried up 🤷🏻‍♂️

I have a bag of spare valve cores and just replace them if they gunk up.

I just buy a pack of valve cores of amazon (£8 for 20) and replace them when they get sticky.

Little tip, that I found by lucky observation. If your valve core get slightly sticky, take it out of the wheel, stick it into your tubeless inflator pump and give it 2-3 blasts of full tank. I found out that little routine moves loads of gunk out of the valve core, if not entirely, quite far enough that you can just pinch it with fingers or tweezers and remove it to prolong your valve core flow and life.

Cheers!
I.

As stated above, I used to have this issue but it has gone completely on every wheel if I ensure the valves are between 5 and 7 o' clock when the bikes aren't being used.