Our mosaic group has been asked to assist in a project where 50 kids will make stepping stones (as many as possible) but they only have two 2 hour sessions to complete the work. The only way we can do this (and keep the cost low) is to glue glass on to preformed concrete stepping stones.
My Question -- will undiluted weldbond work for this exterior application? I have always used silicone adhesive for my own outdoor projects but the folks who are staging this project are concerned about fumes -- hence the weldbond option.
Anyone with experience in this? The bottle says that is can be used on concrete but I trust "real" experience more.