The first bowling ball I left out in winter ( WI ) I had used the wrong adhesive on it - I used liquid nails and all the globs popped off like popcorn. When my neighbor's kids were small - they thought my yard was "enchanted" because they'd find jewels all the grass ... LOL

Well - that reply was no help - just thought I'd give you a laugh. Hopefully some of the BB Guru's will post the answer :-)

I have a BB that stays out all summer and winter in my zone 5 weather. But mine is mosaiced with stained glass and some awful adhesive that was spread onto the ball and the stained glass pressed into it. So far it has held up well. I think weatherproofing would depend more upon what you use to mosaic it with. The GEII and sanded grout should hold up to subzero temperatures. I would seal the grout with grout sealer (can be found by the grout in a home improvement store) so it doesn't discolor from dirt. Very delicate china might not hold up to the freezing temperatures. I can never remember why, but some ceramic tile doesn't hold up in the cold and wet either.

Thanks Luna! I just don't want to putthings out anymore that I have to lug inside. Plus I love having something to show off in the winter. My plate flowers are so pretty in the snow for example.
kathy

I have one ball made from stained glass squares and broken china that is grouted. I have always kept it indoors. I also have some balls made with glass marbles put on with GE II silicon. One has been outdoors for about 4 years now and has only lost a marble here or there. I had painted the ball first and some of the paint has worn off, but it's held up pretty good through rain, snow and heat.

mine get stored inside over the winter

silicone glue is used extensively outdoors in all kinds of weather in the construction industry.

dcarch