Krown rustproofing?

[New_to_Mazda5]

Having heard of Mazda vehicles being prone to rust, I am thinking of some kind of rustproofing. My mechanic recommended Krown (www.krown.com).
Does it make sense at all? The car is already 4 years old and apparently no rustproofing was ever done. The car looks rusty underneath but no visible rust on body panels yet.
Please, personal experience with Krown: did it help?
Thanks


Update: Just read an opinion that krown product may destroy rubber parts like seals and bushings, is it true?

 

[ROBOTO]

Hello, we have a 2009 Mazda 6, and a 2014 Mazda 5. Both got treated with Krown.

The Mazda 6 got sprayed 3 times, then we stopped doing it. Car looks fine, some superficial rust on suspension components and other undercarriage parts.

Mazda 5 got sprayed when it was brand new. I plan to keep re-spraying it.

I have not seen any issues with the rubber parts in our Mazda 6 so far.

I hope this helps.

 

[New_to_Mazda5]

Hello, we have a 2009 Mazda 6, and a 2014 Mazda 5. Both got treated with Krown.

The Mazda 6 got sprayed 3 times, then we stopped doing it. Car looks fine, some superficial rust on suspension components and other undercarriage parts.

Mazda 5 got sprayed when it was brand new. I plan to keep re-spraying it.

I have not seen any issues with the rubber parts in our Mazda 6 so far.

I hope this helps.

Thank you, I already got Krown and feel better now, after your comment.
The only complaint: my driveway is now very oily. I guess it's normal with this kind of treatment.

 

[tchiarella]

How much was it? Rust was mainly an issue on early gen 1 mz3s

 

[fatpat]

I guess it can't hurt, but I never sprayed my 2009 M5GT and I never spotted any rust other than surface rust on the chassis. The bolts on the lower engine cover did rust and seize though.


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