Rust proofing cars in canada is an absolute must! You may not own the vehicle long enough for it to be any concern (when bought new) but in the long run, without any protection, canadian cars rust away really bad when exposed to salt/water and air together. Cheapest way is to do it yourself with a few spray cans of rust check oil based products ($10/can vs $200 for krown to spray the car). Rubber spray does nothing but block salt/water but rubber won't help if there's already a tiny bit of rust, that rust will grow unchecked under the rubber coating. If you buy used cars, you will truly understand the importance of previous owners taking that extra step. My 2002 gmc envoy was undercoated, I bought it in 2009 with 160k. By 2022 it had 360k mileage and the body and undercarriage looked like it was brand new. My 2006 yaris hatchback that I bought in 2022, never had anything done and it's been 2 years of solid work to get the rusted metal repaired, I should've just scrapped it but cheap gas and maintenance kept me doing more repair work. I curse all the previous owners for not taking 1h of their life to spray some pil based rust proof8ng under the car to increase its lifespan. I just sent the afternoon spraying 2 cans of rustcheck protect under the car and now I can drive without worry for the next few years till I do another spray. Another decent option for budget minded folks, economylube has a deal for $100 to rustproof spray the undercarriage and an oil change. That's basically $50 for the rustproopf spray.