By December 1, 2006

Cat Crap anti-fog, uh, gunk review

Cat crap review As winter approaches and the chance of getting rained on increases, it is very important to me to find an anti-fogging solution for my helmet visor. The fogging problem that results from a warm, internal environment versus a cooler, external environment is exacerbated by wearing cold-weather gear such as a balaclava, lower face mask, or cowl.


“Cat Crap” is the name of a product with a history among motorcyclists and snowmobilers. I bought three half-dollar sized containers from CampMor for less than $10 shipped. Cat Crap is a aqua-blue … goop … that is spread onto the inside of a visor. I took my visor off the helmet, cleaned it thoroughly, and then applied the Cat Crap. Like car wax or Rain-X, Cat Crap dries in a smear and can be buffed out with a soft cloth. This is the major weakness of the product, and those like it. In order to buff the visor clear enough for my liking, I probably removed too much Cat Crap.

The first time I rode with the crapped-on visor, I tried my best to fog it up. I blew breath directly onto the visor from my mouth, then through my nose, and then again from my mouth with my jaw jutted forward, in a mix of Gamorrean guard and bulldog. Each time, my visor didn’t fog up completely, but got hazy enough that it obscured my vision. Granted, it wasn’t as bad as the full-on fogover that I experienced in September, but I expected better performance.

I put on more Cat Crap yesterday, especially in the middle area of my visor, where I am most likely to encounter critical fogging. I breathed heavily onto my visor like a late-night caller. My lens glazed again, but not so much that I couldn’t see. In preparing for these photos, I put on another new coat of Cat Crap before subjecting it to my Utterly Unscientific Testâ„¢:

I generated a lot of steam with water on a rolling boil. There was some light glazing and condensation at first, but I imagine I would have unobstructed vision.
http://gallery.drfaulken.com/d/1269-2/IMG_5449.JPG

The edges started to fog over as more steam billowed out of the pot. This was after about thirty seconds of steam-cleaning:
http://gallery.drfaulken.com/d/1271-2/IMG_5450.JPG

The center of the visor started to glaze over and lightly fog after another ten seconds. This would definitely impair my vision, especially at night. Any oncoming headlights or overhead street lighting would “starburst” on my visor.
http://gallery.drfaulken.com/d/1273-2/IMG_5451.JPG

Here’s a shot of my microwave through the visor. You can see the fog on my visor in the center near the top and bottom (look at the “DEFROST” key). If you squint, you might be able to see the hazing elsewhere on the lens.
http://gallery.drfaulken.com/d/1275-2/IMG_5452.JPG

Cat Crap is plentiful enough that you could get twenty or so applications out of each container. That’s sixty applications for less than $10, making Cat Crap the cheapest attempt at fighting visor fogging. Cheaper than a mouth guard that installs in the helmet, or a special mouth-sock kind of thing that channels breath down towards your chin. It is most certainly cheaper than buying or custom-building a two-pane visor. It is also much less effective.

All in all, I have to say after reading the legends about Cat Crap on the Internet I expected a lot more. Cat Crap will do in a pinch, or help as a secondary anti-fog measure, but I wouldn’t rely on it alone.

Cat Crap, I scratch up the litter box and squeeze out:
Three out of five STFU mugs
full STFU mug full STFU mug full STFU mug empty STFU mug empty STFU mug

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Posted in: motorcycling, review

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