I noticed a tape like putty over all of my seams. It looks like it's been there for awhile. There were some cracks in this so I used RV cauking to fill the cracks. Hopefully I did it correctly. I haven't had any leaks but wanted to stay ahead of this.
2016 Dodge Ram 2500 Laramie 6.7 CTD, 45 gallon gravity tank, Cooper A/T3's, Bilstiens
2012 Arctic Fox 22H 300 watt Solar, Morningstar TS-45, 460 AH batteries, Xantrax 1000 watt PSW