Ranger Simon Hurley Stamping Foam Heart With these mouldable foam pieces you can create original and unique stamps. To use, heat the foam with a heat gun. Then press the foam into the textured surface and hold it in place for 5 to 10 seconds. Apply the ink or product of your choice to the foam and stamp as you would a stamp. It can be cleaned with water. The foam can be reheated and remoulded for repeated use.