Where applicable, this may be the strongest glue available. It is certainly very strong and versatile. I have used it for everything from model airplanes to a cast iron candle holder. However, it must be clamped while it sets, as it expands while setting. It does not not harden in the bottle so any amount not used can be used at a later time. The glue is water activated, one side of two pieces to be attached should be moistened. When set the joint is waterproof.