These are Super-Bond extra-strength adhesive glue sticks. Hot n Cool melt glue sticks work in Hot Melt and Cool Melt glue guns. Adhesive Specifications Hot n Cool Melt Super Bond hot melt adhesive to be applied in high and low temperature glue guns. Bonds to porous and non porous material. Specifications, Softening Point: 178°F. (81°C.), Working Time: 40 seconds, Viscosity / Centipoises: 5,500 @ 380°F. (193°C.) 12,000 @ 356°F. (180°C.), Color: Mint Green, Shape: Round, Pounds per case: 5 lbs., Temperature of Glue Gun: High and Low Temperature