Jump to content
The mkiv Supra Owners Club

Undersealing


Eve
 Share

Recommended Posts

Never underseal a used car unless you can get it pressure washed properly, then put in a paint drying oven for 24 hours, which will cost a fortune. If you seal "as is" all you do is trap moisture and salt in all the panel seams and box sections. I'd leave it, pressure wash it and after a long period of hot dry weather Waxoyl it thoroughly.

Link to comment
Share on other sites

Never underseal a used car unless you can get it pressure washed properly, then put in a paint drying oven for 24 hours, which will cost a fortune. If you seal "as is" all you do is trap moisture and salt in all the panel seams and box sections. I'd leave it, pressure wash it and after a long period of hot dry weather Waxoyl it thoroughly.

 

I know which i'd be doing :)

Link to comment
Share on other sites

Never underseal a used car unless you can get it pressure washed properly, then put in a paint drying oven for 24 hours, which will cost a fortune. If you seal "as is" all you do is trap moisture and salt in all the panel seams and box sections. I'd leave it, pressure wash it and after a long period of hot dry weather Waxoyl it thoroughly.

Good info! Thanks

Link to comment
Share on other sites

Never underseal a used car unless you can get it pressure washed properly, then put in a paint drying oven for 24 hours, which will cost a fortune. If you seal "as is" all you do is trap moisture and salt in all the panel seams and box sections. I'd leave it, pressure wash it and after a long period of hot dry weather Waxoyl it thoroughly.

 

That CW bloke is right again :D

 

Steam clean or pressure the underside of the car first, then if you're going to underseal use one of the rubberised Schutz products rather thaen the tar based ones.

Use a proper compressed air applicator and mask off all suspension, exhaust, gearbox & prop, diff, brakes, wheels & tyres as the stuff can go everywhere. Oh, and mask off the sides of the car from the sills up.

 

The problem with tar based underseal (the ones from Halfords) is that it hardens with age and cracks. These cracks allow water in, and once in there's nowhere else for it to go so it sits and rusts the underside of the car.... actually making things worse.

The rubberised products do not crack.

 

The other option (and better option IMHO) is to use Waxoyl as this forms a flexible and self healing surface over the bottom of the car. It sprays on easily with the pump up can, allows you to see whats happening to the underside and also is easy to get off if needed.

You just need to top it up with a bit more Waxoyl every 2 years or so. Again mask everything off.

Link to comment
Share on other sites

As said above by the men in the know. Get it done properly. Im sort of into landrovers and there is a guy in the magazine (i will dig it out if your interested) that does this for a living. Charges about £500 per vehicle and takes him a few days to do but the underside looks nearly as good as the outside.

Link to comment
Share on other sites

As said above by the men in the know. Get it done properly. Im sort of into landrovers and there is a guy in the magazine (i will dig it out if your interested) that does this for a living. Charges about £500 per vehicle and takes him a few days to do but the underside looks nearly as good as the outside.

 

Yeah, I've seen that too. Looks awesome but for that price it ought to be!! Its a lifetime treatment using specialist products, like the Dinitrol rustproof kit sold by Frosts http://www.frost.co.uk/productList.asp

 

Its really good stuff, even if it is a bit expensive.

Link to comment
Share on other sites

I did se another guy who also offered a painting service and the finish was meant to be hard as nails. I will dig them out tomorrow as ive been thinking on this aswel.

 

You want Por15 for painting the underside..... it really is tough stuff. Did the Range Rover with it when it was rebuilt in 2003. Still no sign of rust now, and I just painted it over rust as I got fed up grinding it back :D

Link to comment
Share on other sites

When i got mine it was understealed, its pretty rubbery / flexiable at the moment. It does make under the car look tidy i have to say. All that above chat about not been done properly is worrying me now lol (it certainly looks a decent job) but who knows if it was stripped back first ! doh !

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. You might also be interested in our Guidelines, Privacy Policy and Terms of Use.