Hi Friends,
The fellow who started the above thread wanted a definitive answer to this controversy on whether or not oil-containing conditioners harm topcoated leathers. This is an attempt at that definitive response, hence the lenght of this post.
I have put up several posts and started a couple threads on this topic -- top coats and oil-containg conditioners. I have also discussed it in the Leather Forum at Edmunds.com. Here is some info and links.
This is a synopsis of the matter:
There appears to be some contradictory opinions regarding use of leather conditioners containing oils on modern leathers. Most modern auto leathers have "top coats." The top coats are formulated to create a variety of benefits, including protection of the leather.
The theory advanced is that leather conditioners containing oils will damage the top coat. On the other hand, leather conditioners such as Hide Food contain oils and are widely endorced.
Leathers in US cars are made by the Big Three tanners. Eagle Ottawa is one of the Big Three. They make top coated leather for auto makers. Tanner's Preserve is made by Eagle and recommended for use on all leathers. It is oil based.
I posted the above contradictory info on the Edmunds site and asked TraderAlex1 for his views. I posted his responce on this site. Here is the post:
http://216.147.22.29/forum/showthre...15&pagenumber=2
For more posts by TraderAlex1 on the subject of auto leather, top coats, the Big Three, etc., go to
www.edmunds.com, the Townhall section, Maintainance sub-section, then select the Leather Maintainance forum.
Here is some info I wrote up on using saddle soap, and other leather topics:
A mostly academic comment: saddle soap is OK on vegetable tanned leathers. This comment is academic because almost none of your cars, and no new ones, have vegetable tanned leather. They are chrome tanned. Saddle soap is verbotin on chrome tanned leather. I do some leather work as a hobby and love the vegetable tanned leathers . . . you can work oil into them easily, you can really "feed" them, they will last forever, etc., but they are harder to come by and can be more expensive.
Hide food is OK. I have used it and it works, but, it is a good amount of work. Or, you could say it is very satisfying, because you get to rub in into the leather with your hands. It just a question of viewpoint. Is the glass half-empty or half-full?
Another piece I wrote :
Re Leather
Keeping the leather conditioned is important. As to the conditioner, TraderAlex1 on Edmunds.com says that the auto leather makers ("tanners") have tested all the national brands, extensively, and have found them all to be basically OK. He suggests to use what you like.
An idea has been circulating that you should not use products containing oils on modern auto leathers. All modern auto leathers have a "top coat" applied by the tanners per the auto maker's specifications. The top coat is designed to accomplish various purposes, protect the leather, etc. The idea is that products containing oils will break down the top coat.
TraderAlex1 posts on Edmunds.com. He is a dealer is hides. I asked him about this. TradeAlex1 wrote a long piece in response, politely refuting the idea.
http://townhall-talk2.edmunds.com/W...^
[email protected]/450 He has pointed out that 1. hides come from animals and they naturally have oils and fats in them (fats, which exist in hides, are simply oils that are solid at room temperature) 2. products containing oil -- which many national brands do -- have been tested by the tanners and they are OK. In fact, one of the big three tanners, Eagle Ottawa, sells a product, Tanners Preserve, that has oil.
Be aware, however, that certain oils, particularly straight oils like mink oil or neatsfoot oils, can perminantly darken the leather, and not always in a consistent manner. So, although I use mink oil on leather goods I make (as a hobby) those leathers are vegetable dyed and they are black to begin with. I would never use straight mink oil on light leather or modern auto leather, particularly if it was a light color leather. I guess you could use it on black, but, man, you'd have to let it sit awhile -- maybe a few days -- to let it soak in throughly. I'd go with a blended product, a leather conditioner.
TraderAlex1 says that while it is not horrible to use a combination cleaner/conditioner, it is better to use seperate products.
A big enemy of the leather is light, particularly UV, which is one reason why 303 protectant is popular on this site. Keeping your car garaged and covered when it is out of a garage is one of the best things you can do for the leather (and the car). This is also a reason to tint the windows (to cut down on the light and UV).
Lastly, NEVER use saddle soap on modern auto leather. Saddle soap does work on saddle leather, which is vegetable tanned. Most modern leather is chrome tanned and saddle soap does not work well with it. Use a leather cleaner.
Here is one of TraderAlex1's posts on the topic of conditioners:
#449 of 452 further thoughts on conditioning and a useful website by traderalex1 Jul 20, 2001 (03:39 pm):
Yes, I don't believe any of the nationaly branded leather cleaners and conditioners will harm the automotive leathers out there. Most of the automotive leathers in use in the world have their roots from the American Big Three automotive leather tanners, whose dominance of this market is overwhelming. And they got where they are by offering a product featuring superior technique and quality, not marketing muscle.
Keep in mind several points: Leather was once living tissue with natural fats and oils, so putting it back into the leather is not going harm it. The automotive leather market really started to develop in the late 1980's. Prior to that period, it was not unheard of for automakers to employ furniture leather for their automotive seating, with predictable (and disasterous) results. The American Three pioneered a technology to produce a dedicated car seat leather that would hold up to abuse, as well as teh elements. They assume that the typical owner will likely do little or nothing to care for his/her car seats. So your own efforts and willingness to fuss after the upholstery in your car is an enormous plus torwards keeping the seats looking good, for years. An opportunity to keep your vehicle out of the sun, or in a cool garage, is also quite helpful. Yes, you can hurt automotive leather, if you really work at it, but it is not necessarily an easy thing to do.
Most of you participating in this form have likely using some nationally branded set of cleaner and conditioner in your cars, for years.
If you were causing damage to your seats, you would have likely seen evidence of some finish degradation, after a time. I think most of you have generally been happy with your long experience in using your chosen brand of care product(s). I don't believe these concerns that were brought up on that other website, therefore, make a whole lot of sense. My guess is that your long term experience is your answer.
Note by Darbh: Alex says elsewhere that he spoke with friends at the Big Three and that had done actual reseach validating the above.
<strong class='bbc'>A Misconception Regarding Topcoats[/b]
Many years ago, manufacturors came up with a technique for topping leather with vinyl. This is a true "topcoat." The vinyl sits on top of the leather. Some seem to believe that the commonly encountered topcoats on auto leather sit on top of the leather, too. I did a search on the net and read several articles on top coats. Many of the articles discussed the fact that so-called "topcoats" actually <em class='bbc'>penetrate[/i] the leather. They are not just a thin coating that is just "on top" of the leather.
Next, there are many different kinds of TCs. Why? Each produces different effects. Some waterproof. Some decrease cracking. Some reduce wear, etc. AND, get this, a so-called top coat may not be a topcoat. Why? Because auto leather can have several so-called "topcoats" applied to it, one after the other. They ought to call them "final treatments" in order to avoid confusion.
<strong class='bbc'>The Source of Confusion[/b]
I do not know the factual basis for the belief that most topcoats are just on top of the leather, other than the unfortunate fact that they are <em class='bbc'>called[/i] "topcoats." I speculate that it is this mis-naming that is the source of confusion and the belief that the topcoats sit on top of the leather and can be worn off (of cource, TCs will degrade over time, whether they penetrate the leather or sit on top of it. Everything degrades eventually).
<strong class='bbc'>Is There an Authoritative Source for the Idea That "Conditioners Containing Oil Are Bad"[/b]
I have several times asked for a referal to a study supporting for the idea that the auto leather makers are wrong and leather conditioners containing oils damage the leather. No one seems to have a referal, except to a post on this site in which one of our members said he thought that conditioners damaged the top coats. This member's experience is at odds with the reported experience of the Big Three auto leather makers.
<strong class='bbc'>My Conclusion[/b]
Until we get refered to a definitive link, I have to think that the idea that oil-containing conditioners harm leather is an unsupported belief. It is just a rumor that has been passed from person to person. With this rumor spread around, now, "everyone knows" that oil-containing conditioners harm leather. But, no one can tell me the source of the idea, so I have to withhold belief in the idea until I get some evidence. For now, I catagorize it as an old wifes' tale.
I'm ready to change this view in a second if someone has evidence to the contrary!
