the issue with tape is if it comes off and goes into the valve. have seen this lots. also pretty sure maxton says to NOT use teflon tape. have you tried talking to them and see what they recommend? i have good success with gasoila, but like other mentioned you need to let it cure for 24 hours. the other thing not mentioned here is shelf life. i always mix with a drill and after a year or so best to throw it in the garbage and buy another. the back of the van is not ideal for storage of dope unless you're using it every day.