Autotorch 2121 Burnerfits the autotorch system 2 The 2121 Burner is a DescriptionWell spread softer flame for heat shrinking of plastics for cable jointing and other industrial plastics. Particulalrly designed for Raychem heat shrink sleeves but well used for those of many makes. Also well designed for applications for sleeves, flooring and plastics of many kinds. Care and time is required to make a professional joint with a heat shrink sleeve. Do not allow the flame to play for too long on any one point – keep moving over all the surface of the sleeve until a good joint has been made. If you require smaller burners for heat shrink this can be done with other burners in the range but more care needs to be taken to ensure the flame is constantly moved over the surface of the sleeve.