WD-40 works by displacing water (the WD stands for Water Displacement), so it can be a great waterproofer in a pinch if it's wet or snowy out.
Five More Surprising Things WD-40 Can Do

You already use WD-40 to loosen bolts and stop squeaking hinges, but did you know it could do these other amazing things around the house?
Waterproof Your Shoes and Boots
Keep Squirrels Away From Bird Feeders
Spray around your bird feeder and enjoy watching pesky squirrels slip and slide right off.
Get Rid of Sticky Fingers
WD-40 dissolves tough sticky and gluey materials with ease.
Remove Floor Scuff Marks and Oil Spots
If mopping isn't doing the trick, try WD-40 to remove tough scuffs and stains.
Clean the Toilet
Remove lime stains from the toilet bowl by spraying in some WD-40, then scrub with a toilet brush and flush.
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This edition is part of the Genius House Hacks archive — 20+ years of tips, rebuilt from the original Handy Hints newsletter. Browse more hacks →