Hello again B17. The glue Wurger mentioned is available under many trade names, and is used by builders, decorators, carpenters etc. The TYPE is P.V.A. adhesive, and normally comes in polythene 'bottles' with a nozzle on the end, rather like a washing-up detergent bottle. Get it from a hardware store - it'll be cheaper there! Don't worry when you first apply it, as it will look white, but dries clear (can use it for puddles or shallow water). If it not totally clear, it can be painted.