I’ve heard that some people say when it comes to an undercarriage spray, spray on rubber is bad because it traps the rust allowing it to deteriorate without you knowing how bad it actually is. Is this true? And if so is there a product that you would recommend that’s doesn’t do this?
This has been discussed over and over. Please use the search box before creating a new topic.
Even if you applied rubberized undercoating to a perfectly clean, virgin, metal frame, as soon there a pin prick hole in it, the water will get through the coating, get trapped there, and invisibly eat the frame away. After the first year or so, I think having rubber is worse than nothing at all.
The better treatments are the wax based formulas like Fluid Film, Crown, or lanolin.
some people just spray on very viscous oil, though this doesn't last as long.
The oils and waxes can be sprayed on any surfaces (including painted, and partially rusted) because it penetrates in , displacing water and oxygen. But you have to keep reapplying them , and it's not cheap. It's not really worth it unless you live in a bad bad rust state. The best prevention is just keeping the undercarriage as clean as possible. Remove mud and salt regularly.
Ok thank you. Next time will definitely use the search bar 👍🏻
Yes, that's true. In order to properly de-rust something, it has to become bare metal again. Fluid Film is a good product, but it's only a stop-gap measure. The rust has to be clean to do it right.
