This water soluble glue is supplied in an easy to use plastic bottle with an applicator tip that makes it simple to apply in small amounts. It lightly tacks pieces of glass in place prior to firing and as it is slow drying it makes it easy to make adjustments to your work before it sets. The organic colourant makes it easy for you to see where you've put the glue on clear glass. The glue burns out in the kiln. Use sparingly.