Using spray foam to keep water out of the house seems like a great idea, particularly as spray foam can be relatively easy to apply in awkward areas. ... a separate sealer should be applied first.

This spray won’t leave behind any scratches or water spots and is safe to use on all car paint finishes. Flowgenix™ Waterless Car Wash Spray – $20.99 $20.99 at Amazon ...

Water is heavy. An illustration: Open up your car window as you drive in a gentle rain shower and see what the drops feel like hitting your hand at 50 mph.