^ Yes, there's a balance of ability to creep, and enough viscosity to hold up to the elements without washing away. That why I was a Rust Check guy....They use a thicker material (very similar to fluid film) on the underbody, wheel wells, etc, but use the thinner (red colored) product in all the inner panels, which creeps well and doesn't clog up the drain holes. Krown product, IMO, is too thin and wears off rather quick. Rust Cure 3000, which is kinda scarce, is the best single formula option I've come across.