The Testors 3517C instant cement is perfect for just about any plastic, metal and wood model or craft project. Because it bonds in seconds it is perfect for bonding joints that normally would require clamping. Testors Super Glue is safe to use with most plastics and metals, however we do not recommend its use on cloth, Styrofoam, vinyl or Clear Plastic parts. Testorâs Super Glue bonds instantly, so it is not recommended for use by children under the age of 13 with out parental supervision. Use 3515C to join Clear Plastic Parts.