Should I Use The Foam Gaskets Or Ditch Them For Caulk???

Hey all,
So I'm in the final stages of waterproofing all my accessories on my teardrop. I have used Dynaflex 230 to waterproof my deck ports for the AC and my Fantastic Fan and noticed that my exterior flood lights and 30amp power plug both come with what looks like a cheap foam gasket. Now to me this seems like a problem waiting to happen if I use they're cheap foam to waterproof vs. ditching them and then making a gasket (so to speak) with the Dynaflex 230. Just would like some opinions as soon as possible please on what you would do and why, thanks!!!!!
So I'm in the final stages of waterproofing all my accessories on my teardrop. I have used Dynaflex 230 to waterproof my deck ports for the AC and my Fantastic Fan and noticed that my exterior flood lights and 30amp power plug both come with what looks like a cheap foam gasket. Now to me this seems like a problem waiting to happen if I use they're cheap foam to waterproof vs. ditching them and then making a gasket (so to speak) with the Dynaflex 230. Just would like some opinions as soon as possible please on what you would do and why, thanks!!!!!