This glue can be used for glass, ceramics, porcelain or metal. It worked beautifully when I made coasters by gluing cork (left over from the floor) to sample porcelain tiles, and for gluing aluminum foil to cardboard for a Halloween costume
-- this glue can adhere to non porous materials, unlike the flour paste in the previous step. I also tried repairing a broken mug with it but it fell apart when I filled it with hot tea -- this glue is somewhat waterproof, but not heat resistant. You can fix a plate with it, but do not put that plate in the dishwasher or microwave.
1 pack unflavored gelatin
3 1/2 tsp water
2 tsp skim milk
In a small cup pour gelatin over cold water to soften.
Boil milk (a few seconds in the microwave will do the trick) then mix it into the wet gelatin and stir till all the lumps have dissolved.
Adhesion works best when this is applied hot. If it is too runny for the surface you are gluing, let it to cool down and gel before you paint it on.
Store in a small covered jar for a few days. Warm over a pan of hot water before use.