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Correct stuff for sealing the screws and such??

Discussion in 'Day Sailers' started by Shorefun, Sep 25, 2018. Add this thread to a FAQ

  1. Shorefun

    Shorefun

    Joined Sep 5, 2018
    89 posts, 7 likes
    Hunter 170
    US Northfield, NJ
    I took off some of the hardware to start working on the 170. I see at the screw holes and under some of the hardware was what appears to be white silicon.

    Is that what is used?
     


  2. justsomeguy

    justsomeguy

    Joined Feb 20, 2011
    6,739 posts, 1,062 likes
    Island Packet 35
    US Tucson, AZ/San Carlos, MX
    Let's hope not. Silicone is a poor bedding material that has undesirable non-stick after-effects. If that's what it turns out to be, sanding will only embed the residue deeper into your gel coat.

    Fingers crossed! ;)
     


  3. SG

    SG

    Joined Feb 11, 2017
    1,273 posts, 241 likes
    J/Boat J/160
    US Annapolis
    Life Caulk (a trade name)?
     


  4. Shorefun

    Shorefun

    Joined Sep 5, 2018
    89 posts, 7 likes
    Hunter 170
    US Northfield, NJ
    The stuff I found looks and feels like silicon.

    I would have serious questions about it being LifeCaulk because it drys harder and is not to be used on Lexan. According to the description.
     


  5. SG

    SG

    Joined Feb 11, 2017
    1,273 posts, 241 likes
    J/Boat J/160
    US Annapolis
    Could it be 3M 4200 that's dried or (hope not) 5200?

    What's the question about Lexan? I thought it was sealing holes for hardware attached to fiberglass?
     


  6. justsomeguy

    justsomeguy

    Joined Feb 20, 2011
    6,739 posts, 1,062 likes
    Island Packet 35
    US Tucson, AZ/San Carlos, MX
    @Shorefun , good question.
     


  7. Shorefun

    Shorefun

    Joined Sep 5, 2018
    89 posts, 7 likes
    Hunter 170
    US Northfield, NJ
    I have a 170 with the plastic hull.
     


  8. SG

    SG

    Joined Feb 11, 2017
    1,273 posts, 241 likes
    J/Boat J/160
    US Annapolis
    There are a number of things that will permanently mess-up Lexan. If you're replacing or repairing glazing, you would use different sealants (butyl or silicone, for example), then if you're basically sealing screw-openings or sealing a stanchion.
    Silicone will keep stuff out -- it's just not the best. If you use it, be careful to get a marine grade silicone. In a salt environment, it will avoid metal corrosion that a non-marine silicone may encourage. Whatever you use, it's not easy to clean it out. (You usually need to drill it out and repair the hole with expoxy, etc.).
     


  9. LeslieTroyer

    LeslieTroyer

    Joined May 20, 2016
    1,990 posts, 753 likes
    Catalina 36 MK1
    US Everett, WA
    The best material for bedding fittings is @Maine Sail bedit butyl - read the tips for getting leak free at marinehowto.com

    Les
     


    jrussnogle likes this.
  10. Shorefun

    Shorefun

    Joined Sep 5, 2018
    89 posts, 7 likes
    Hunter 170
    US Northfield, NJ
    Bed It butyl is not for plastic it seems. The guy says do not use it for plastics.
    I am guessing I need marine silicon for the plastic 170 hull.
     


  11. Maine Sail

    Maine Sail Moderator

    Joined Feb 6, 1998
    10,761 posts, 570 likes
    Canadian Sailcraft 36T
    US Casco Bay, ME

    The "guy" does not say that. (wink)

    Bed-It is perfectly safe for use with plastics but the fitting being bedded needs to be mechanically fastened. I would be far more concerned about the use of polyurethanes, polyethers and polysulfides on an ACP hull than Bed-It Tape.
     


    jrussnogle likes this.
  12. justsomeguy

    justsomeguy

    Joined Feb 20, 2011
    6,739 posts, 1,062 likes
    Island Packet 35
    US Tucson, AZ/San Carlos, MX
    If you're gonna search online, spell it "silicone". Dow 795?
     


  13. SG

    SG

    Joined Feb 11, 2017
    1,273 posts, 241 likes
    J/Boat J/160
    US Annapolis
    I think that you'd get the Silicone as part of search using 'Silicon' ;^))))

    Of course you might get shots of breasts too ;^)
     


    justsomeguy likes this.
  14. justsomeguy

    justsomeguy

    Joined Feb 20, 2011
    6,739 posts, 1,062 likes
    Island Packet 35
    US Tucson, AZ/San Carlos, MX
    I'm on a mission from god. Breasts are good too!
     


    Meriachee likes this.
  15. Crazy Dave Condon

    Crazy Dave Condon

    Joined Jun 8, 2004
    6,850 posts, 649 likes
    -na -NA
    US Anywhere USA
    Regular silicons with additives is not the best. I use to buy pure silicon archetichual grade that adheres well. Suggest that you clean off all the old silicon and where you plan to use it, lightly scratch the surface and use alcohol to remove any residual. That is what I did repairing The ACP boats.
     


  16. Meriachee

    Meriachee

    Joined Aug 1, 2011
    2,807 posts, 809 likes
    Catalina 270
    CA Wabamun - on the orange ball
    Now there’s a thread hijack worth talking about.
     


    justsomeguy likes this.
  17. BobbyFunn

    BobbyFunn

    Joined Apr 16, 2017
    404 posts, 165 likes
    Federation NCC-1701
    US Riverside
    The outer hull of the 170 is
    Acrylonitrile styrene acrylate (ASA) plus or minus whatever hunter manufacturing did to save a couple bucks .


    " ASA can be glued with cyanoacrylates; uncured resin can however cause stress cracking. ASA is compatible with acrylic-based adhesives. Anaerobic adhesives perform poorly with ASA. Epoxies and neoprene adhesives can be used for bonding ASA with woods and metals"

    Check out how to seal acrylic windows

    Bonding and Sealing Plastic Windows

    https://www.google.com/url?sa=t&sou...FjAAegQIAxAB&usg=AOvVaw0-jOEdZ3uQZHSM3nHJjdv1
     


  18. BobbyFunn

    BobbyFunn

    Joined Apr 16, 2017
    404 posts, 165 likes
    Federation NCC-1701
    US Riverside
    I used white butyl caulk when i rebed the 6 rudder bolts on the rudder post. It has worked great so far with no issues. I also took all the remaining hardware off and resealed everything with the same tube. No issues, not one.
     

    Attached Files:



  19. FDL S2

    FDL S2

    Joined Jun 29, 2014
    225 posts, 84 likes
    S2 7.3
    US Fond du Lac
    Just my opinion, but I think @Maine Sail and @Crazy Dave Condon are the two guys to listen to here.:)
     


  20. JimInPB

    JimInPB

    Joined Aug 22, 2017
    1,315 posts, 383 likes
    Hunter 212 & 170
    us West Palm Beach
    Is that the generic name for Luran S? That's a nice piece of information to have.

    That aside, I have had good luck with both 5200 & West Systems epoxy sticking to my ACP boats.