Those builders ones I have put up are waterproof on the palm side,,cos there rubber,, however the back is just thin stretchy material,,, so of course it's not waterproof ,,, that's why I change them after an hour or two,, check your tool stals on markets mate,, there cheap as chips,, usually 5 quid,, for 2 or 3 pair,, aldi they were 3 quid for 3 pair,,,but then went down to 1.50 coming to the end of the line,,so they might not have any left,,,, have a root round in them wire trays,,, you might find some