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Whats the best Radiator sealer out there?? Which ones to avoid??

This is a discussion on Whats the best Radiator sealer out there?? Which ones to avoid?? within the General Help forums, part of the LSx Technical Help Section category; I can see a small leak on my radiator. Im overheating a lil bit. Just want to know if someone ...

  1. #1
    Junior Member
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    Red
    2001 WS6 Pontiac TransAm

    Whats the best Radiator sealer out there?? Which ones to avoid??

    I can see a small leak on my radiator. Im overheating a lil bit. Just want to know if someone has successfully sealed thier radiator. Or have you had a bad experience with the sealers? Thanks.

  2. #2
    Member LS1Z28's Avatar
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    Camaro

    Prestone super sealer is the best I found .Sealed a head gasket leak and lasted 20,000 miles before it failed.

  3. #3
    Senior Member 02z28ls1's Avatar
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    2002 Z-28 Camaro M6

    The stuff that comes in the little tube-filled with grey powder-sorry don't remember the name but it's very common. It works great and doesn't seem to clog stuff up.

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    Retired NOT tired SteveC's Avatar
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    2001 Z28 (Sara)

    Thumbs up

    Quote Originally Posted by 02z28ls1 View Post
    The stuff that comes in the little tube-filled with grey powder-sorry don't remember the name but it's very common. It works great and doesn't seem to clog stuff up.
    I believe you are talking about "Alumiseal", it is great stuff.

    SteveC

  5. #5
    the cake is a lie twozs's Avatar
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    black 01 red 73
    01 z28 and 73 z28

    doesent that crap mess with your heater core and all your water passages i heard it accumulates in it an viola no heat and eventualy core failure and we all know what that means , ripping the dash out the best fix is a permanant one especally with a very expencive aluminium motor that is very difficult to replace heat and aluminium dont mix!

  6. #6
    Senior Member 02z28ls1's Avatar
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    navy blue
    2002 Z-28 Camaro M6

    Yeah-'Alumiseal'-is the name. First off I want to point out that on the late model F-bodies replacing the heater core only requires removing the glove box-not the whole dash. Secondly using stop leak like 'Alumiseal' doesn't always clog stuff up. If you're on a serious budget you have to do what you have to do-I've been there=done that.

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