Here's a great example of using the proper connector for the the task at hand. One that is waterproof and can withstand the demands of being used on a motorcycle in all weather conditions. As you can see in the pic, no further waterproofing is needed other than heatshrink with hotglue protecting the LMR240 entering the N connector. I know, I should have used 1/2" Heliax for this extremely long run to minimize cable loss, but the bending radius was too large to get in those tight spots. Anyway, This has been on this motorcycle for close to 10-years and no water has entered the coax. Damn, sometimes I do a job so good I scare myself.