Cut insert soaking up sealant

Dirt or Die · Feb 5, 2024

I cut down two extra large Vitoria tire inserts to fit two together for my 80mm wide fat bike rim. When switching out tires, I saw that the part of the insert I cut is soaking up sealant.

I wanted to see if there is a way to stop this. I first thought maybe a blow-torch type of lighter to singe the cut parts. But not sure how flammable the inserts are?

Also thinking maybe using an old iron on the cut side?

Before I try one or both of these anyone have some thoughts or advise?

Thanks!

127.0.0.1 · Feb 5, 2024

Its waterproof coating prevents the absorption of sealant

sealant sucking will happen if you find a way to iron or melt it... as the coating is compromised

once sliced, sealant sucking can't be stopped w/o adding a lot of weight

TylerVernon · Feb 5, 2024

Coat it with epoxy?

turnerbikes · Feb 5, 2024

glue together with silicone?

DT

noapathy · Feb 5, 2024

I don't understand this waterproof coating explanation. How do the regular ones not absorb sealant (or do they?)? You have to cut the end to fit the rim and then re-join with a zip tie, plus another hole for the valve.

Jolyzara · Feb 5, 2024

How heavy are those wheels with soaking up all that sealant? 😬

Dirt or Die · Feb 5, 2024

noapathy said:
I don't understand this waterproof coating explanation. How do the regular ones not absorb sealant (or do they?)? You have to cut the end to fit the rim and then re-join with a zip tie, plus another hole for the valve.

Yeah, not sure I understand this either. I thought there was something about closed cell foam that needed to be used to keep sealant from soaking in. I had thought that meant all of the foam was closed cell so wouldn’t matter if cut like when you cut it to size or what I did.

I will check the ends for sealant being soaked up as well.

I like the idea of maybe glueing the two together.

127.0.0.1 · Feb 5, 2024

Dirt or Die said:
Yeah, not sure I understand this either. I thought there was something about closed cell foam that needed to be used to keep sealant from soaking in. I had thought that meant all of the foam was closed cell so wouldn’t matter if cut like when you cut it to size or what I did.

I will check the ends for sealant being soaked up as well.

I like the idea of maybe glueing the two together.

I don't know
that coating info came from Vittoria website
maybe they are talking about a different version of liner when I looked it up
----------------------------------------------------------------------------

OK I found my problem, that is air liner ROAD that has a coating

MTB doesn't
The Air-Liner is compatible with all tubeless and tubeless-ready mountain bike tires and ammonia-free sealant.

Dirt or Die · Feb 6, 2024

127.0.0.1 said:
The Air-Liner is compatible with… ammonia-free sealant.

Well then. Wonder if the ammonia causes the foam to soak up the sealant?

Mike_G · Feb 6, 2024

shoe goo

ctrailfreak · Feb 7, 2024

If it floats a boat maybe it’s strong enough to keep liquid out of your foam.

Cut insert soaking up sealant

Dirt or Die

127.0.0.1

TylerVernon

turnerbikes

noapathy

Jolyzara

Dirt or Die

127.0.0.1

Dirt or Die

Mike_G

ctrailfreak

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