Is anything better than kurust?

[V1nce Fox]

Got a cheap old runner which is completely solid underneath but is just starting to show rust marks. Nothing bad, just surface dryness.

I want to treat the underside then seal it and will probly go with old fashioned brush on kurust but before i do, is there anything better for this job in the same price range?

I just want to kill any surface marks on the underside before stoneguarding, etc.

[Panamax]

One word: Hammerite.

Regrettably once tin worm takes hold you'll never stop it. Best you can hope for is to slow it down. Main thing is to get the old surface wire brushed to a solid base before you start.

[Darkslider]

I use Vactan, seems to be the same stuff just substantially cheaper.

[mike9009]

Darkslider said:

I use Vactan, seems to be the same stuff just substantially cheaper.

Seconded, vactan has worked well on my old T25.

I would be wary of sealing the underneath now rust is already evident. You might just seal in a problem area with a bit of moisture, making the problem worse and the repair more difficult.

[gweaver]

You could try Bilt Hamber Deox-Gel (rust remover) or Hydrate-80 (rust converter). Deox-Gel would need to be kept in contact with the rust using cling film or similar, which could be tricky.
I think they are usually happy to give advice if you were to ring them.

[abucd4]

Hydrate 80 every day of the week

[cologne2792]

Buzzweld's Rust Control Primer (RCP) is superb. I used it on a Ford Ranger chassis two years ago and it's still absolutely unmarked.

It's now been replaced with Rust Encapsulation Primer which I've yet to try.

Used to use Hammerite which was brilliant until it came over all Health & Safety and it now resembles thick gloss paint.

[Belle427]

In my experience avoid any hammerite products these days like the plague.
Some good products here.
https://www.rust.co.uk/

[ShinyPsyduck]

These products can be used on a wet chassis as they are supposed to disperse the water if you can believe that fully.

I undersealed a cheap car over winter using a spray can version of Hammerite underseal. I wouldn't recommend this method as the spray nozzles clogged instantly and I went through many cans.

[A500leroy]

https://www.screwfix.com/p/no-nonsense-red-oxide-m...


Not as good as the old stuff but still pretty decent.

[Thats What She Said]

Wire brush off the loose stuff
Treat with Vactan or Hydrate 80
Spray with Lanoguard

[marksx]

The bilt hamber products are very good

[V1nce Fox]

Vactan looks a lot like kurust but bigger bottles so that’s a good shout.

I’ll look at lanoguard too.

[DVandrews]

Tannic acid (trustan 23).

Dave

[QJumper]

Don't know if it's any better or worse, but last time I used Jenolite, followed by Bilt Hamber Dynax UB.