anti dry rot wax availability

[friendly_jacek]

dry rot = ozone cracking
Lots of good info on the wiki page: http://en.wikipedia.org/wiki/Ozone_cracking

Quote:
The problem can be prevented by adding antiozonants to the rubber before vulcanization. Ozone cracks were commonly seen in automobile tire sidewalls, but are now seen rarely thanks to the use of these additives. A common and low cost antiozonant is a wax which bleeds to the surface and forms a protective layer, but other specialist chemicals are also widely used.


I understand that tires in constant use bleed such wax to the surface forming contact protection. Tires not in use lose the protection due to wax on the surface destroyed by ozone (sacrificial protection).

You would think those antiozonant waxes should be commercially available for consumers to put back on the tire surface when tires are not in use.

Are they?

I also noted that some old timers put brake fluid or motor oil on tires and swear it prevents tire rot. Then a number of naysayers who never used it cry foul. Who is right?

I think we can agree that solvents on tire is a bad idea as they wash away the wax and increase ozone production when exposed to UV light.

 

[racer12306]

In for answers to this. My car sits most of it's life so something to help prolong tire life would be great.

 

[leeharvey418]

Thinking that it would be a bad idea from a product liability standpoint to have yahoos smearing wax all over their treads and then taking off down the road.

 

[John_K]

I was in hospital for three months, I got home and found 2 flat tires. Was told they had cracks through the side wall and must be replaced, this must be why. Thanks for sharing.

John

 

[HerrStig]

An article on tires in R&T some years ago qouted a Conti engineer who was asked about tire shine products on motorcycle tires--- "keep it OFF the tread AND the sidewall" .

 

[Pablo]

Whatever the two slip and slide products they put on my 2014 WRX tires should be banned. It took manual scrubbing and time to remove it, so thank goodness there must no be too much deep in the compound. The tires stick quite well now.

Find my thread about it. VERY VERY dangerous driving out of the dealer on a wet day late December last year.

 

[friendly_jacek]

I found some interesting info here: http://www.thefreelibrary.com/Review+of+antiozonants-a014459625

Will take some time to digest it but this caught my attention:

Quote:
Applying an ozone-resistant rubber coating can offer relatively durable protection. Such a coating is insensitive to temperature changes and is not subject to leaching, volatilization or other losses, but once the coating is scuffed or punctured, the underlying rubber is rapidly degraded. Additional equipment and expense are required to apply the coating to the rubber part. Several types of coatings are used.

Extruded veneers are used by the tire industry to protect the sidewall from ozone and weather. Other laminated articles such as boots and protective garments can also use this approach to ozone resistance.

Elastomeric solutions can provide protection against ozone. Commercial preparations are available. Alternatively, home-made versions can be formulated from fully-saturated rubbers. Suppliers of chlorosulfonated polyethylene, polyacrylates, polyurethanes and other elastomers can offer guidance on the preparation of solution coatings. Solvent recovery equipment may be needed to comply with volatile organic compounds (VOC) regulations.

Latex-based coatings can avoid the VOC problems. Parker and Roberts recently announced the availability of a hydrogenated nitrile latex with ozone resistance (ref. 16). Latex emulsions of selected solution polymers are also offered commercially (ref. 17), including EPDM, chlorosulfonated polyethylene and polyisobutylene.

 

[Hokiefyd]

Originally Posted By: Pablo
Whatever the two slip and slide products they put on my 2014 WRX tires should be banned. It took manual scrubbing and time to remove it, so thank goodness there must no be too much deep in the compound.


My then-new 2011 Camry had some really mean stuff on the tires when it left the dealership. Despite the manual effort, it took a few scrubbing sessions to get that junk off. It sure was durable...for better or for worse!

 

[njohnson]

Perhaps using Optimum Opti-bond tire gel on the tires might slow down the rubber dry rot?

The last poster in this thread works for Optimum, and he is saying their tire gel uses the same UV and ozone protectants that tire manufactures use when they make the tires.

http://www.autogeekonline.net/forum/prod...d-tire-gel.html

 

[friendly_jacek]

Originally Posted By: njohnson
Perhaps using Optimum Opti-bond tire gel on the tires might slow down the rubber dry rot?

The last poster in this thread works for Optimum, and he is saying their tire gel uses the same UV and ozone protectants that tire manufactures use when they make the tires.

http://www.autogeekonline.net/forum/prod...d-tire-gel.html


Great find. I used Optimum products before and they are top-notch. Thanks.

 

[CapriRacer]

I am not a rubber chemist, but I did stay at Holiday ..... oh wait. That's not right.

Here is my understanding about antioxidants - AO's.

First, waxes are NOT AO's. They form barriers. In the rubber matrix, they will slowly migrate to the surface, then flake off. So not only does exercising a tire help replenish the waxy layer, but eventually, all the wax will be used up.

But waxes aren't shiny. They are dull (flat, matte, as opposed to glossy), so they don't look very good. Anything that makes the tire shiny is removing those waxes - so whatever product that is being used to make the tire shiny has to be applied repeatedly - and hopefully it has AO's in it.

AO's act like little magnets - attracting the oxygen and ozone molecules so they don't attack the rubber molecules. But doubling the amount of AO's doesn't double the protection. Not only do they get used up in vulcanization, they will flake off with the wax if unused. Besides, they are pretty expensive.

 

[pandus13]

Originally Posted By: CapriRacer
I am not a rubber chemist, but I did stay at Holiday ..... oh wait. That's not right.

Here is my understanding about antioxidants - AO's.

First, waxes are NOT AO's. They form barriers. In the rubber matrix, they will slowly migrate to the surface, then flake off. So not only does exercising a tire help replenish the waxy layer, but eventually, all the wax will be used up.

But waxes aren't shiny. They are dull (flat, matte, as opposed to glossy), so they don't look very good. Anything that makes the tire shiny is removing those waxes - so whatever product that is being used to make the tire shiny has to be applied repeatedly - and hopefully it has AO's in it.

AO's act like little magnets - attracting the oxygen and ozone molecules so they don't attack the rubber molecules. But doubling the amount of AO's doesn't double the protection. Not only do they get used up in vulcanization, they will flake off with the wax if unused. Besides, they are pretty expensive.

1.Since CapriRacer, our resident tire expert (Thanks for having you Barry) started in a humorous note, didn't we had an expat last year reporting from Taiwan that he used canola oil to close visible cracks in his "cooked" tires?
2.since you mentioned waxes (and this is BITOG) can they use "the-super-waxy-never-die-myth" Penzoil?
3. I really hope nobody takes serious the content of 1. and 2. ....

 

[friendly_jacek]

Originally Posted By: CapriRacer

But waxes aren't shiny. They are dull (flat, matte, as opposed to glossy), so they don't look very good. Anything that makes the tire shiny is removing those waxes


I thing you nailed it on the head here. This is probably why tire makers tell repeatedly not to use any tire "dressings."