Seam sealer recommendation

Hello tw, recently ive discovered that there is alot of dust and fine particles that have been sitting in the lap weld, seam, and spot weld areas, i figure this wouldn't be too good for long term as the particles will eventually wear away at the protective coatings and foster rust. can anyone recommend a good sealer (like silicone shower seal is the only thing i can think of) that has good adhesion and flexibility. but i want to know what auto manufacturers use or something similar. this thin sheet metal looks like paper mache.

 

I’ve found Flexseal to live up to the hype. RV makers typically use lap sealant from Dicor but I believe it’s mostly for the self leveling properties.

 

3M Cavity Wax Plus, 08852, 18 oz (511 g)

$38 3M Cavity Wax Plus Aerosol Spray, 08852, 18 fl oz, Self-Healing, Corrosion Protection, Non-Hardening, Chipping, Peeling, Cracking

https://www.amazon.com/dp/B0741FHDPF

 

Or just ignore it.

 

I cleaned and flooded all of my seams with fluid film. Sure it may trap new dirt on it, but it will always remain sealed with the fluid film.

 

I've used Eastwood seam sealer with good results. It adheres well and remains flexible.
Probably any brand of automotive seam sealer would do the trick.

 

Go to any automotive paint store. They have seam sealer specific for body panels that will stay flexible.

 

I use Dicor lap sealant on my trailer. It will self level pretty well, but it might also find its way through the gap and leave a hole on the surface of the bead.
Napa or any auto paint supply shop will have actual automotive seam sealer.
Clean it and dry it well before using any sealer. I also prep all surfaces with an alcohol wipe to ensure no adhesion issues.

 

Spray it with a non hardening undercoating, It wasn’t sealed up for a reason.

 

Permatex RTV gasket stuff.

 

i thought cavity wax only works when the target area is brand new/virgin?

 

while this makes sense, undercoating attracts so much dust its crazy

 

flex seal is definitely an interesting concept

 

it works on painted surfaces as well. It is mainly used for areas that can't be coated by other materials once finished such as inside frame rails or rocker panels. If you spray there it will repel anything that tries to stick to it. How long it will last on an outside area is another question, maybe for you to answer for us if you try it.

 

where is this area?

 

id love to but its quite pricey

 

its the spot behind the headlights where the radiator support meets the fender supports

 

i took a picture of that area because its the most accessible for my camera. i had been inspecting for cracks forming in that area from a different thread i was reading.

 

honestly a nice ceramic coating will probably prevent it or at least repel mud/water stains. Hard to get to but I can't imagine too many problems will occur back there. I don't even recall the last time I even looked that spot on my truck LOL

 

There is no way to completely seal areas off. If you try to seam seal it, dirt and debris will still get in there and cause long term worse damage. By trapping it and you won't be able to clean/spray areas out as well. I would leave it be, as other suggested.