Bombs & stans

[ACM]

Hello hubbers

 

Is there any truth that bombs affect stans (in tubeless conversions)? Some people say / rumour has it that the bombs react with the stans and affect the stans' composition and that one should not inflate with bombs OR at least replace stans after one have used a bomb to inflate.

 

I've used bombs many times over the past 3 years to inflate tubeless tyres and never had any problems with stans sealing punctures - so as far as I'm concerned it's a rumour. However, is there any other opinions out there / scientific arguments against my theory (that bombs do not affect stans or the ability of stans to patch a puncture).

 

Thanks!

[W1Z@RD]

I have also never had any issues when using bomb to reinflate.

 

I imagine it would be pretty pointless (or not as great) that if you used a bomb, you would need to reapply the sealant each time.

 

I think there is no truth based on my experiences to date - and I have had had quite a few of late

[jcza]

Yip makes it solid, after bombing tyre clean out and fill up with Stans.

[rouxtjie]

sniff sniff sniff....do I smell a mythbuster episode.

[awesme]

Heard some of the tyre sealant are ammonio based, and the CO2 re-acts with it.

 

Don't know how truthful this is though.

 

G

Edited January 15, 2014 by awesme

[Big Wheel Cycles]

Yeah the cold C02 makes the latex solidify. If you use a bomb let the tire down when you get home and re inflate with a floor pump to save the Stan's.

[Wil6]

Yip makes it solid, after bombing tyre clean out and fill up with Stans.

+1

[jcza]

From old thread - comment by JB (2011)

 

Stan's, Joe's and other latex-based sealants contain a couple of ingredients:

 

1) Latex

2) Water

3) Dissolved ammonia

4) Sawdust/rubber shavings/paper fibre

 

The Latex congeals on contact with air to for a rubber plug. The water dilutes the latex, the ammonio keeps fungus and rot at bay (latex is tree sap in is prone to rot) and the other bits help to plug the hole.

 

Homer Simpson (on the Hub, not TV) once explained to us that the water ammonia mixture is slightly alkaline and this alkalinity keeps the latex suspended in the dilutant.

 

With the addition of CO2 (by means of a bomb), the liquid turns slightlty acidic and can no longer contain the latex in solution. The latex then "crashes out of the emulsion" he explained. Simply put, it doesn't like acid water and groups together and gets the hell out of there. It then forms a latex ball, like int he picture.

 

The remaining liquid still sloshes around in the tyre and gives you the false impression that you still have sealant in there. However, it is simply impotent water and won't fill a hole.

 

This should be distinguished from drying out. Latex in tyres dries out over time. The hotter it is, the quicker it dries. The thinner your sidewalls, the quicker it dries.

 

 

Dried out sealant usually coats the inside of a tyre evently.

[Wil6]

Yeah the cold C02 makes the latex solidify. If you use a bomb let the tire down when you get home and re inflate with a floor pump to save the Stan's.

Thats a great idea. you sure the CO2 does not react immediately with the sealant?

[rouxtjie]

Heard some of the tyre sealant are pneumonia based, and the CO2 re-acts with it.

 

Don't know how truthful this is though.

 

G

kekekeke

[taito]

After 3 years relax just ride

[Gandalf]

Have never had an issue. Only time I have had an issue was because the hole/puncture was pretty big and had to put in a tube.

[awesme]

ye ye, corrected it already.

 

tyre is sick, it needs help...

 

G

 

kekekeke

[NotSoBigBen]

I've read on some of the newer sealant bottles 'CO2 friendly' or something like that, can't remember which make .....

[jcza]

I've read on some of the newer sealant bottles 'CO2 friendly' or something like that, can't remember which make .....

 

I hesitate to buy anything that does not say Stans on the bottle.

[rouxtjie]

I hesitate to buy anything that does not say Stans on the bottle.

Agree hey....my man stan, he can.