Looking for a substitute for TENAX 7R??? Hobby enthusiasts have looked far and wide for an equivalent bonder that will work with styrene sheets, models and other plastic products, so JMD Plastics has come up with an equivalent product that will always be in stock. Styrene-Tack-It has similar properties as TENAX 7R, works exactly the same, dries in just 5-10 seconds and makes a solid bond with all styrene plastic joints.