Fresh water reservoir leaks

[Bryce C]

It leaks out of these twist lids, there are two of them. When the tank is full enough it sloshes the water around enough while I am driving to come up through these lids and get all over the floor of the van. I've tightened them as much as I can. Have any of you experienced this? Have you sealed them with silicone or something that can still be removed later if there are service needs?

 

[Nate The Great]

Black RTV gasket maker will seal it and still be able to service it later..

 

[Bryce C]

Black RTV gasket maker will seal it and still be able to service it later..

Excellent, thank you!