# Krown Rust Control **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** sierra-1500, gmc, rust\ **Created:** [July 7, 2021, 9:03pm UTC](https://community.cartalk.com/t/krown-rust-control/177896 "2021-07-07T21:03:38Z")\ **Posts on this page:** 8\ **Page:** 2
**Author:** ![kcac\_1\_157641](https://avatars.discourse-cdn.com/v4/letter/k/57b2e6/32.png) [@kcac\_1\_157641](https://community.cartalk.com/u/kcac_1_157641)\ **Post date:** [July 8, 2021, 11:53pm UTC](https://community.cartalk.com/t/krown-rust-control/177896/21 "2021-07-08T23:53:40Z")
> [@Beancounter](#): > > Personal opinion is that any spray on corrosion prevention treatment is worse than doing nothing as any chip or scrape in the undercoation creates a point to retain moisture and accelerate rust develoment. Spray-on oil products like Krown or Fluid Film do not dry, chip, or crack. They remain oily. The yearly reapplication is recommended because since those products do not dry and seal on to the surface of the vehicle, they will get washed off by undercarriage road-spray. And because they remain oily, they collect dirt. ---
**Author:** ![Beancounter](https://avatars.discourse-cdn.com/v4/letter/b/59ef9b/32.png) [@Beancounter](https://community.cartalk.com/u/Beancounter)\ **Post date:** [July 12, 2021, 1:26pm UTC](https://community.cartalk.com/t/krown-rust-control/177896/22 "2021-07-12T13:26:25Z")
Let’s think about this for a moment … “they will get washed off by undercarriage road-spray” - Assuming that it provides some initial protection, if it gets “washed off” when will that protction end? Ten seconds before annual reapplication? “And because they remain oily, they collect dirt” - The last thing I’d like clinging to my car is road “dirt”, containing an exotic mix of chemicals, road salt and moisture, especially if it’s going to be “washed off” to collect into those rust prone crevices that exist on all cars. A $100 bucks won’t break the bank but I think you’ll do better spending it in regular undercarriage flushes and touch up pain. . ---
**Author:** ![kcac\_1\_157641](https://avatars.discourse-cdn.com/v4/letter/k/57b2e6/32.png) [@kcac\_1\_157641](https://community.cartalk.com/u/kcac_1_157641)\ **Post date:** [July 12, 2021, 2:43pm UTC](https://community.cartalk.com/t/krown-rust-control/177896/23 "2021-07-12T14:43:34Z")
There are probably multiple variables. Some vehicles are more prone to rusting. Another factor is the length of ownership and the number of miles driven, especially in winter. My guess is most new vehicles will not show signs of rust for seven or eight years, so the flushing would be sufficient. But I keep my vehicles for 15 plus years. I previously rinsed the undercarriages thoroughly throughout the winter. I have had better luck slowing/preventing rust using Fluid Film. Anymore I feel the best tactic would be to buy new vehicles, wash them and rinse the undercarriage regularly, and keep them no longer than ten years. Or relocate to an area with a climate where road salt and brine is not needed. ---
**Author:** ![Renegade](https://avatars.discourse-cdn.com/v4/letter/r/b4bc9f/32.png) [@Renegade](https://community.cartalk.com/u/Renegade)\ **Post date:** [July 12, 2021, 3:41pm UTC](https://community.cartalk.com/t/krown-rust-control/177896/24 "2021-07-12T15:41:25Z")
kcac\_1\_157641 Or relocate to an area with a climate where road salt and brine is not needed. Best idea I have seen in this discussion so far. 😀 😀 ---
**Author:** ![shadowfax](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/shadowfax/32/13026_2.png) [@shadowfax](https://community.cartalk.com/u/shadowfax)\ **Post date:** [July 12, 2021, 3:47pm UTC](https://community.cartalk.com/t/krown-rust-control/177896/25 "2021-07-12T15:47:08Z")
> [@kcac\_1\_157641](#): > > wash them and rinse the undercarriage regularly, and keep them no longer than ten years. There’s two schools of thought on that. One says wash all the salt off. The other says that does more harm than good. Salt doesn’t rust anything until water gets involved. If you’ve got a bunch of salt on your car, but it’s very cold, so the roads are dry and there aren’t any puddles of water around, it may be better to just leave the salt alone until the weather warms up enough that the car will get wet from puddles or snow melt. That line of thinking also points out that a high pressure jet of water from a car wash might force salt (and water) into areas it usually wouldn’t get to, where it then sits, nice and wet, and starts working on rusting the car out. Honestly, I find both arguments have merit. > [@kcac\_1\_157641](#): > > Or relocate to an area with a climate where road salt and brine is not needed. As soon as that becomes a possibility, I guarantee that’s what I’m going to do! ---
**Author:** ![kcac\_1\_157641](https://avatars.discourse-cdn.com/v4/letter/k/57b2e6/32.png) [@kcac\_1\_157641](https://community.cartalk.com/u/kcac_1_157641)\ **Post date:** [July 12, 2021, 7:00pm UTC](https://community.cartalk.com/t/krown-rust-control/177896/26 "2021-07-12T19:00:05Z")
> [@shadowfax](#): > > That line of thinking also points out that a high pressure jet of water from a car wash might force salt (and water) into areas it usually wouldn’t get to, where it then sits, nice and wet, and starts working on rusting the car out. That sounds like what I did - pushing the salt into every little crevice, with the high-pressure wands at self-service car washes. ---
**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\ **Post date:** [July 12, 2021, 7:04pm UTC](https://community.cartalk.com/t/krown-rust-control/177896/27 "2021-07-12T19:04:31Z")
I dont agree. if you leave the salt on when the snow melts or you go through a puddle the salt will get wet and start causing damage. wash it off the best you can. the less salt the better. any time I use to go fishing on the beach with 4x4 I would wash the underside to get the sand and salt off. if you pushing the salt into crevices you are also pushing water into the same area to get the salt out. ---
**Author:** ![kcac\_1\_157641](https://avatars.discourse-cdn.com/v4/letter/k/57b2e6/32.png) [@kcac\_1\_157641](https://community.cartalk.com/u/kcac_1_157641)\ **Post date:** [July 13, 2021, 1:00am UTC](https://community.cartalk.com/t/krown-rust-control/177896/28 "2021-07-13T01:00:38Z")
Hopefully, someday someone will find a way to keep the roads clear that does not corrode vehicles and roadways. Those of us in the road salt areas of the world probably spend more on personal transportation due to rust prevention, repair, or a quicker vehicle replacement cycle than drivers whose roads never see snow or ice. [Previous page](https://community.cartalk.com/t/krown-rust-control/177896.md?page=1)