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Undersealing

This is a discussion on Undersealing within the General Help forums, part of the LSx Technical Help Section category; Hi everyone, my car is at risk of having to become my daily driver. If it comes to this I'll ...

  1. #1

    Undersealing

    Hi everyone, my car is at risk of having to become my daily driver. If it comes to this I'll have to get the underside sealed to keep the awful British weather from it.
    Before I go ahead, are there any components under there that shouldn't be treated? I presume that the brakes are the most obvious, but I'd like to know of anything else beforehand - masking off components is a whole lot easier than having to clean them afterwards.

    Hopefully it won't come to this , but just in case.

    Cheers.

  2. #2
    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
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    fuel & brake lines, any wire looms and emergency brake components. Also exhaust.

    To do it right you're looking at a total break down to get to just the body.


    What are you looking at as far as a sealant?

  3. #3
    Member speedyWS6's Avatar
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    "What are you looking at as far as a sealant?"

    Hi Mike, as Scott inquired.... what do you intend to use as the main product?

    I came close to using a firm called Rustmaster and Waxoyl Professional Home Page but also had a really long talk with a
    guy who's name escapes me at an Holden specialist and they do a phenomenal number on the car where they
    strip things down/off to gain access for 3M seam sealer followed by all of the good Dinitrol products. This company
    is called http://www.monkfishperformance.co.uk/ Trust me.... a very helpful guy, could not stop him talking and
    if you contact him you will be sold!! Not cheap, but you get what you pay for, eh!?

    Hope this helps

    Trev
    Last edited by speedyWS6; 10-15-2012 at 12:13 PM.

  4. #4
    Quote Originally Posted by SMWS6TA View Post
    fuel & brake lines, any wire looms and emergency brake components. Also exhaust.

    To do it right you're looking at a total break down to get to just the body.
    A total break down sounds expensive. There's a workshop local to me, I'll ask them if that's how they do it.


    Quote Originally Posted by SMWS6TA View Post
    What are you looking at as far as a sealant?
    I've only just had a need to think about this, do you have any recommendations?

  5. #5
    Member speedyWS6's Avatar
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    Mike,

    I did an old '64 Buick with Dinitrol throughout.

    have a look at http://www.rust.co.uk/ very comprehensive site and very helpful also.

    Dinitrol always trumps in classic car tests in practical classics rag!

    Trev
    Last edited by speedyWS6; 10-15-2012 at 12:09 PM.

  6. #6
    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
    98 T/A w/a little mods...

    Almost all modern cars come with a undercoating, is there some rusting already happening?

  7. #7
    Quote Originally Posted by speedyWS6 View Post
    "What are you looking at as far as a sealant?"

    Hi Mike, as Scott inquired.... what do you intend to use as the main product?

    I came close to using a firm called Rustmaster and Waxoyl Professional Home Page but also had a really long talk with a
    guy who's name escapes me at an Holden specialist and they do a phonominal number on the car where they
    strip things down/off to gain access for 3M seam sealer followed by all of the good Dinitrol products. This company
    is called Welcome to Monkfish - the big fish is always right!!! Trust me.... a very helpful guy, could not stop him talking and
    if you contact him you will be sold!! Not cheap, but you get what you pay for, eh!?

    Hope this helps

    Trev
    Hi Trev, I've heard of Monkfish and what they do for the Monaro's suspension and handling, I'll check them out.


    Cheers.

  8. #8
    Quote Originally Posted by SMWS6TA View Post
    Almost all modern cars come with a undercoating, is there some rusting already happening?
    There are a couple of scuffs on eitherUnderside.jpg side of the trans tunnel, between the wheels (see image highlighted in red). They look like a previous owner drove over speed bumps or off a kerb and caught the underside.

  9. #9
    Spaz is My Mentor SMWS6TA's Avatar
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    if you're just looking at doing the floor pans then you are in luck, not so much work. Most of the items I mention are tucked into the tunnel along both sides. Fuel is on the driver's side, e brake is on the top of the tunnel and the brake lines I'd have to look again but I believe they run along the passenger side of the tunnel.

    I'm not sure of the products you have access over there but a product called lizard skin is pretty good for both heat and sound and is paint able. Application is easy, you can roll, brush or use a paint gun (special tip).

  10. #10
    Quote Originally Posted by SMWS6TA View Post
    if you're just looking at doing the floor pans then you are in luck, not so much work. Most of the items I mention are tucked into the tunnel along both sides. Fuel is on the driver's side, e brake is on the top of the tunnel and the brake lines I'd have to look again but I believe they run along the passenger side of the tunnel.
    That's encouraging, do you think it would be ok to just mask off the parts not to be treated or is disassembly the way to go?

    Quote Originally Posted by SMWS6TA View Post
    I'm not sure of the products you have access over there but a product called lizard skin is pretty good for both heat and sound and is paint able. Application is easy, you can roll, brush or use a paint gun (special tip).
    Trev's given me some good suggestions to look into.

  11. #11
    Spaz is My Mentor SMWS6TA's Avatar
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    As long as it's just the under side of the floor pans that has an issue I don't see no issue with doing that.

  12. #12
    Quote Originally Posted by SMWS6TA View Post
    I'm not sure of the products you have access over there but a product called lizard skin is pretty good for both heat and sound and is paint able. Application is easy, you can roll, brush or use a paint gun (special tip).
    That product is available here in the UK. I'm not too bothered about the heat but the sound reduction one sounds ideal.

    Out of interest, what will you be using to coat and protect your 8.8 build when it's finished?

  13. #13
    Spaz is My Mentor SMWS6TA's Avatar
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    I'm going to run it a while without painting it because I want to make sure I can see any weld failures or fractures. If all goes well and I have no issues after some heavy testing (I.E. hard launches at the track and street) and while doing some hard turns and such I'll see about getting it powder coated.


    One more thing, I also plan on using the Lizard Skin on the inside floor pans when I do my interior. My carpet is getting dated and will need replaced in the next yr or so. So while I'm doing that I can go ahead and spray it down . In the long run it's much cheaper and better then dyno mat.

    It will help cut down on road noise and heat.
    Last edited by SMWS6TA; 10-16-2012 at 11:17 AM.

  14. #14
    Moderator Firebirdjones's Avatar
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    Lizard skin is good stuff. I've only used it for sound deadening though, I've never considered it something I'd put on the underside of the floor for rust protection,,,but I guess it could serve that purpose too.

  15. #15
    I'm looking for something to primarily cover up the scuffs on the underside to seal it from the atmosphere and keep the rust-worm at bay. If there is something out there that is very tough and will give with body flex, rather than flake off like hammerite does, that would be absolutely spot on.

  16. #16
    Moderator 98TransAmWs-6's Avatar
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    What about POR 15. They make this whole system that you treat the current rust, then put a preventative, and then a sealant if wanted. Thats what I plan on using all over my car when I tear it apart for paint.
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  17. #17
    Quote Originally Posted by 98TransAmWs-6 View Post
    What about POR 15. They make this whole system that you treat the current rust, then put a preventative, and then a sealant if wanted. Thats what I plan on using all over my car when I tear it apart for paint.
    That's something else to look at, I never thought I'd be so spoilt for choice.

  18. #18
    Moderator 98TransAmWs-6's Avatar
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    This is what I was referring to. You obviously would want more to do the whole underside of your car but this gives you an idea.

    http://www.por15.com/SUPER-STARTER-KIT/productinfo/SSKB/

    This sealant can be sprayed right over POR 15. It apparently absorbs heat, sound, and other things as well as prevent rust.

    http://www.por15.com/RUBBERIZED-UNDER-COATING/productinfo/RUCS/

    Also POR guarantees their product won't crack, flake, or peel off.
    Last edited by 98TransAmWs-6; 10-18-2012 at 11:00 PM.

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