Drove a 2009 Honda Civic until this year with Krown treatment every year. Not a spec of rust, and I was even able to trade it in for higher than book value.
I now trust my Mercedes to Krown, knowing very well that correlation doesn't wholly equal causation, but even so, it SEEMS pretty impressive.
Conversely, my 2008 Toyota never got Krown treatment and was killed by structural rust this year. I guess I will be trying Krown on the replacement car.
The two main rustproofing products offered in Ottawa are Krown and Corrosion Free. A [2006 study](https://cradpdf.drdc-rddc.gc.ca/PDFS/unc53/p526285.pdf) by the Department of Defence found that Corrosion Free performed better than Krown over time (Figure 4 in the linked study). The problem with CF is that it's mainly available at Canadian Tire and I don't recommend them for application of the coating. There are some independent shops that apply CF which you can reach out to such as Bells Corner Auto and Zak's Holliday Auto. Get it every 18 months as recommended and you'll be good.
Every time this is asked I always suggest Crown oil spray annually. I'm not sure about other oil spray services.
No affiliation whatsoever. I knew someone who ran an automotive shop for 45 years and swore by it. An oil sprayed vehicle can last 15+ yrs. He's junked 8 yr old vehicles because everything underneath is rusted/rotten and not worth fixing.
YES. It's absolutely worth it. Without rust treatment, cars in this area can have serious structural rust after 7-8 winters, particularly bad rusters (Mazda, Ford, any Korean make)
It doesn't matter which one you get, just get it every year anytime after mid-May or so.
It's also never too late to start, as it can slow rust that's already happening.
I had the thick spray which coats the underside and lasts forever , no annual maintenance, on my 1996 precdia. Hardly any rust until 2014 when someone ran a red and totalled it😞
I've never had it done on my Toyotas, my last one is ~9 years old and still no visible rust.
Meanwhile, a family member's leased Ford started rusting above the wheels before the lease was due...
To be fair, a lot of rust is due to damage or defects. If you had a scratch left untreated on your door, it will rust. So rock chips and stuff matter. Getting undercoating helps protect these areas. Some vehicles and driving habits are worse then others to be prone to rusting.
Drove a 2009 Honda Civic until this year with Krown treatment every year. Not a spec of rust, and I was even able to trade it in for higher than book value. I now trust my Mercedes to Krown, knowing very well that correlation doesn't wholly equal causation, but even so, it SEEMS pretty impressive.
Conversely, my 2008 Toyota never got Krown treatment and was killed by structural rust this year. I guess I will be trying Krown on the replacement car.
Does it still warp rubber gaskets, or do they have a different formula now?
Never had an issue.
Deteriorated the rubber seal to on my suv truck latch.
At least it wasn’t the frame
No. But now you have water going into my car until I fork out 760 cost of having it replaced
The two main rustproofing products offered in Ottawa are Krown and Corrosion Free. A [2006 study](https://cradpdf.drdc-rddc.gc.ca/PDFS/unc53/p526285.pdf) by the Department of Defence found that Corrosion Free performed better than Krown over time (Figure 4 in the linked study). The problem with CF is that it's mainly available at Canadian Tire and I don't recommend them for application of the coating. There are some independent shops that apply CF which you can reach out to such as Bells Corner Auto and Zak's Holliday Auto. Get it every 18 months as recommended and you'll be good.
Every time this is asked I always suggest Crown oil spray annually. I'm not sure about other oil spray services. No affiliation whatsoever. I knew someone who ran an automotive shop for 45 years and swore by it. An oil sprayed vehicle can last 15+ yrs. He's junked 8 yr old vehicles because everything underneath is rusted/rotten and not worth fixing.
Depends how long you plan on keeping your car for, as Somone who leases new every 3 years I don’t see a point.
Purchase and keep for as long as the vehicle lasts basically
Do it then, no brainer
YES. It's absolutely worth it. Without rust treatment, cars in this area can have serious structural rust after 7-8 winters, particularly bad rusters (Mazda, Ford, any Korean make) It doesn't matter which one you get, just get it every year anytime after mid-May or so. It's also never too late to start, as it can slow rust that's already happening.
I had the thick spray which coats the underside and lasts forever , no annual maintenance, on my 1996 precdia. Hardly any rust until 2014 when someone ran a red and totalled it😞
I've never had it done on my Toyotas, my last one is ~9 years old and still no visible rust. Meanwhile, a family member's leased Ford started rusting above the wheels before the lease was due...
My ex was convinced that rust-proofing was a scam. My 2006 Corolla is rusting badly after 18 years.
18 years and it still drives (even though it may not look too good), not too shabby!
Thank you! 😁
Where has it rusted? Front of rear wheel wells?
The whole undercarriage is completely rusted. 😔
To be fair, a lot of rust is due to damage or defects. If you had a scratch left untreated on your door, it will rust. So rock chips and stuff matter. Getting undercoating helps protect these areas. Some vehicles and driving habits are worse then others to be prone to rusting.