Frank Krygowski wrote:

Could you use something like Sugru
https://sugru.com/ to mold a cover for
your keyhole?

Water always gets inside somehow, and here what
is required to fill the hole and block the key
is so so little. No, I think I'll use this as
my "summer" lock

Interestingly, this is my first quality wire
ever! But I do not doubt the quality in other
parts of the world or in the non-winter season.

--
underground experts united
http://user.it.uu.se/~embe8573