Which Corrosion Inhibitor Spray Brand Wins?

Flex Seal actually did very well. It survived the pressure washer and there is a little bit of rust that's formed where the rock chips occurred. In my opinion, a second place finish

WD-40 actually did a better job than Fluid Film and Corrosion X withstanding the pressure washer... it did really seem to cause a lot of issues for WD-40 Specialist which finished third

the pressure washer seems to remove the Fluid Film from the clean metal panel. However, the panel that had Fluid Film on it that was already rusted is looking pretty good

the pressure washer seems to have washed away the Corrosion X protection

It appears that the pressure washer removed the protective barrier provided by the Corrosion Block product

Flex Seal actually did a very good job. Not a whole lot of dirt accumulated on it

WD-40 Long-Term Corrosion Inhibitor definitely seems to be about the same as used motor oil. Quite a bit of dirt collected on the panels

Fluid Film definitely caused a lot more accumulation of dirt

CorrosionX is definitely by far the worst. Look at that. That is a mess

WD-40 Rust Specialist is also doing a fantastic job. I don't even see rust where the hammer has come in contact with the steel

Fluid Film just totally crushed it. It did a fantastic job at blocking the rust

CorrosionX is actually doing a fantastic job so far in the testing. I don't see any corrosion forming where the CorrosionX has been applied

the Corrosion Blocker isn't blocking the rust. You can see quite a bit of rust beginning to form

it's just not going to do a very effective job. As you can see, it's definitely better than the control, but there's still a lot of surface rust that has already formed

Fluid Film fourth

Corrosion X heavy duty third place

Unfortunately, Corrosion Block isn't doing too well compared to some of these other brands. It is doing better than used motor oil as well as the control