Recommend me a seam sealer,cavity wax and underseal

[DegsyE39]

Hi all hope everyone is winning, Been cracking away with welding up my mk4 golf and even though it's nothing like as easy as it looks on youtube :/ i am getting there so i now have a bunch of welded in bare metal..

What is everyone using after welding? i need a seam sealer, and a good wax/underseal

Thanks!

[steveo3002]

you want epoxy primer onto the bare metal

any pu sealer will do over that

[Grenadier_45]

I've had a lot of good results from the Bilt-Hamber range of products. They do etch-weld primers (Etch Weld), high zinc content primer (Electro-X) for clean metal, and rust converter for metal that's difficult to de-rust in its entirety (Hydrate 80). They also do a zinc-rich epoxy mastic which can go directly onto clean metal, or, they suggest, over their zinc primer, for even better longevity.

Their cavity and under-body waxes seem to be top notch too, from personal experience.

[catfishdb]

3M makes a wax cavity sealer that I have used many times.

It works really well with a set of the long spray tube/nozzles. Some are 36" long. There is nothing you can't reach with the extensions.

Arthur

[Belle427]

Bilt Hamber or Dinitrol are both very good for various sealing waxes.

[e21Keith]

I don't know there's a great deal of difference with the cavity waxes, but then you can't really see inside the cavity to check! I use a professional wax injector kit which runs from my compressor at high pressure.

External treatment I use Dinitrol, but mainly because I have loads left over from a project.

Seam sealer I use any PU adhesive, they all seem to do the same job. There is also a 3M 2 pack product which needs a special applicator run from a compressor that gives a real factory appearance (because its what they use in most factories) but it's really expensive.

Zinc primer has its place too.