This is sold as a 'garden stepping stone' so from this I would presume that it should be fit for purpose in all types of weather. As you can see from my photos, this is NOT the case. I have had this item for less than a year and it is now ready for the  bucket. I am VERY disappointed with the quality. I would either request a refund or a new stepping stone with instructions on how to make it outdoor worthy
Yours sincerely
Susan Laing