REMA repair units vulcanize without heat. Just clean injured area with pre-buff, then apply cold vulcanizing cement and apply the unit. Use REMA PN molded repair units on bias (non-radial) tire using REMA Special BL Super Cement. To make the job even easier, we have a free REMA repair manual with step-by-step illustrations. Made in West Germany. NOTE: Store repair units at room temperature away from sunlight.