Tool Box Lid Penetrations

Just quick question I want to put a fire extingusher on inside of my tool box lid. My plan is to drill in to my toolbox from the top and attach the holder. My question is do I need to put any time caulking or gasket around the hardware to keep the lid water proof. If so what would you suggest?

 

RTV/silicone.

 

I think you should rethink this plan! Get a shop to weld an aluminum bracket on the inside if you must have it in that location.

 

I had some ditch lights mounted on my toolbox lid and used some rubber grommets in the holes. Never had an issue with water getting in any more than usual.

 

Should have welded them on.

 

I see you've made your online status hidden

 

Old news.

I don't like being watched.

 

I would use RTV/silicone, if you plan on bolting it on. Not sure how thick your lid is, but Id look into some sort of reinforcement plate on the other of it. Would suck if a 10lb extinguisher slowly tore the holes open from minor movement and vibrations, causing it to leak.