1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

Calling Adhesive Experts- I Need Sticky Stuff

Discussion in 'The Tool Shed' started by Howard Eisenhauer, Jul 24, 2017.

  1. Jul 24, 2017
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    5,654
    The brake reservoir I built for Tonk sprung a leak. Specifically the aluminum plate in the bottom (that the lines connect to) which was epoxied (JB Weld) to the steel tank has come adrift. Not sure if it's caused by the brake fluid infiltrating and weakening the bond or stress/vibration did it.

    Anyone able to recommend one of theses modern super sealants/glues/adhesives/sticky goop that will last more than a few years?

    Thanks,

    H.
     
  2. Jul 24, 2017
    45es

    45es Sponsor Sponsor

    Naches, WA
    Joined:
    Mar 31, 2007
    Messages:
    558
    Howard Eisenhauer likes this.
  3. Jul 24, 2017
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    5,654
    No, not really.
     
  4. Jul 24, 2017
    ITLKSEZ

    ITLKSEZ Volvophilic

    Post Falls, ID
    Joined:
    Aug 13, 2015
    Messages:
    3,104
    So it needs to survive being submerged in brake fluid?
     
  5. Jul 24, 2017
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    5,654
    Contact *with* brake fluid, specifically DoT 5 silicone.
     
  6. Jul 24, 2017
    oldtime

    oldtime oldtime

    St. Charles,...
    Joined:
    Aug 14, 2006
    Messages:
    2,654
    Cohesive bonding is superior to Adhesive bonding.
     
  7. Jul 24, 2017
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    5,654
    Does this explain why crazy glue eventually lets go but my wife has been sticking around for 30 years?
     
    Danefraz and Bowbender like this.
  8. Jul 24, 2017
    oldtime

    oldtime oldtime

    St. Charles,...
    Joined:
    Aug 14, 2006
    Messages:
    2,654
    Definate Maybe !
    Can you specify what specific material the aluminum pate is boded to ?
     
  9. Jul 24, 2017
    homersdog

    homersdog Tulsa, Ok Sponsor 2019 Sponsor

    Tulsa, OK
    Joined:
    Jan 8, 2012
    Messages:
    1,486
    :rofl::rofl::rofl:
     
    Walt Couch likes this.
  10. Jul 24, 2017
    Cap-n-Cray

    Cap-n-Cray I want to do this again.. Staff Member Sponsor

    Bainbridge...
    Joined:
    Sep 21, 2009
    Messages:
    202,521
    [​IMG] ... :D
     
    BobH likes this.
  11. Jul 24, 2017
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    5,654
    The plate is a round aluminum piece about 2" in diameter & about 3/8" thick. It has a relief cut in the top side edge to give a lip about 3/16" of an inch deep by 3/16" high.

    The upper part of the plate fits into a hole in the bottom of the reservoir & the lip butts up against the reservoir bottom. The epoxy is applies between the lip & the reservoir bottom but it seems that the aluminum does not stay bonded to the epoxy.

    H.
     
  12. Jul 24, 2017
    ITLKSEZ

    ITLKSEZ Volvophilic

    Post Falls, ID
    Joined:
    Aug 13, 2015
    Messages:
    3,104
    I don't know if an epoxy that will hold up to brake fluid long-term. Even the longevity of brazing aluminum to steel is questionable.

    Any chance you can re-make the reservoir out of aluminum or the base out of steel and weld them?
     
  13. Jul 24, 2017
    PeteL

    PeteL Member Sponsor 2019 Sponsor

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    6,302
    I might suspect the different expansion coefficients of the two metals.
     
  14. Jul 24, 2017
    V.O.

    V.O. New Member

    Lunenburg Va
    Joined:
    Feb 5, 2016
    Messages:
    32
    Marine-Tex is a 2 part epoxy that pretty tough. It can be drilled and tapped if necessary. Don't know about brake fluid but it will hold up to oil. Website only says resistant to many chemicals and will bond dissimilar metals.
     
  15. Jul 25, 2017
    47v6

    47v6 junk wrecker! Sponsor

    Washington DC.
    Joined:
    Oct 25, 2006
    Messages:
    4,383
    Dot5 silicone? What will stick to silicone?
     
  16. Jul 26, 2017
    Danefraz

    Danefraz Well-Known Member Sponsor 2019 Sponsor

    Chico CA
    Joined:
    Aug 11, 2012
    Messages:
    1,907
    Not sure, I've used JB weld for the hole in my oil tank on my chainsaw...

    One might add some vaporized stainless powder to it as a base? (Brownells has the powder).
     
  17. Jul 26, 2017
    TIm E

    TIm E Member Sponsor 2019 Sponsor

    NW Arkansas
    Joined:
    Mar 2, 2017
    Messages:
    611
    I would tend to agree with Pete, this could be the culprit...and might indicate a need for a more flexible sealant to deal with the expansion/contraction.

    Another (non-flexible) option is this epoxy putty from KBS. I have used several of their products with good success. I used the putty for repairing my cracked steering wheel, but it does mention in the "application" section that it is good for industrial repairs, fuel, HVAC lines etc. Not sure if it is any different than the thicker JB Weld putty, but again, their products seem quite good from my experience.

    NuMetal - Epoxy Putty - Body Filler - KBS Coatings
     
  18. Jul 26, 2017
    ITLKSEZ

    ITLKSEZ Volvophilic

    Post Falls, ID
    Joined:
    Aug 13, 2015
    Messages:
    3,104
    What about plain old 100% clear silicone?
     
  19. Jul 26, 2017
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    5,654
    Too much vibration & stress from the lines going down the MC I think.
     
  20. Jul 28, 2017
    djcj3a

    djcj3a Member

    Ukiah, CA
    Joined:
    Jan 12, 2010
    Messages:
    206

Share This Page

New Posts