Eye opening test results!
First off, it's all ad copy.
Notoil, on its website, claims its product is waterproof and at another place water resistant. A treated filter with their product holds (saturates) and passes water easily. If the filter gets wet, be it splash or submersion, it will allow the liquid through. Of course the dirt will probably go with the water and out the exhaust. My very unscientific test was under static conditions, I couldn't simulate air movement (suction) that would be occurring under actual conditions.
On to Maxima FFT. Their bottle also makes the waterproof claim along with a statement that it's a "superior oil for stopping the passage of dirt...water and other harmful elements". It also will pass water, but I think being an oil base product it does resist (bead up) splash water a little better than Notoil. I guess Notoil is a polar chemical and as such will always choose to bond with water.
From now on I'll definitely try to seal up the airbox better in wet conditions. Also, I'm very concerned with the large openings both these bikes have in the bottom of their airboxes, deep stream crossings don't have to be THAT deep if you're ridding a bike that is already into its travel and all the water has to do is get 1-2" above the BOTTOM of the airbox. My water depth/riding gauge is still based on the old RMX, your knees got wet before water would spill over into the top of the airbox.
Oh, one last thing. I can't tell if Smets uses their product or not. On the Notoil website he's on the same page as old movie actors and circus clowns! I never saw a solid statement that he uses the product and helped him win numerous championships, etc., etc.
Bud:
Where do you ride? That's some kind of good looking woods.
Oldguy:
I might not be shaking the bottle enough. On accasion I've noticed a residual amount of product in the bottom ofthe bottle.