Thanks Scott,I was wondering what the heater box was made of.I,m going to my favorite store {Fleet Farm} tonight,I,ll pick some J-B weld up. I was contemplating using some stuff I,ve got from 3-M to use on glueing body panel patches together. I got to read the recommendations on the instruction sheet that came with the cartridge. It is 2 part also but mixed via the applicator tube that screws on the end of the cartridge.I though if I remember right, it can be used on some plastics. I wasn,t sure what the heaterbox was made of.......Jeff