Resin choice

Discussion in 'Materials' started by mcdc, Jun 15, 2012.

  1. tunnels

    tunnels Previous Member

    if you not sure do one at a time . dont forget to wet the surface under the glass first then lay the cloth and wet it as well , if you undertsand the gel time and the jobs not to big then do the second one straight after . thickness means the resin will get warm ! warmth speeds up the gel time so think !! one at a time if you are not sure and dont scimp on the resin , the glass is no good by itself the resin and glass work together !!!:):D:p;)
     
  2. tunnels

    tunnels Previous Member

    I think if he was exsperianced he wouldnt be asking this question :confused:
     
  3. mcdc
    Joined: May 2012
    Posts: 70
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: North Carolina

    mcdc Junior Member

    Thanks Guys!! I have used poly in the auto repair shop for years but have never used epoxy until now other than small repairs........thought i would give it a try on the boat.........sounds like it is the same as poly other than no adjustment concerning the cure time/gel.
     
  4. tunnels

    tunnels Previous Member

    If you check with the makers they possible could help with the hardening times .
    its just epoxy after all . !!
    Most epoxys have slow, normal, and fast hardeners !! Temprature plays a big part with the hardening and cure of epoxys . Boat repairs warm it then apply !!
    No hair driers or could cook it and run every where as its cooking .
    Warm as in warm not hot !!the place where its going and the product s. :p:D
     
  5. PAR
    Joined: Nov 2003
    Posts: 19,126
    Likes: 498, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    The safe bet is slow hardener. It may take longer to kick off, but this time of year you usually need all the time you can get.

    Don't start heating your epoxy unless you have a particular reason for this.
     
  6. mcdc
    Joined: May 2012
    Posts: 70
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: North Carolina

    mcdc Junior Member

    I ended up with the extra slow hardner........tried to lam with the slow and decided i needed the extra slow while the heat is 100. Did get the foam in the fuel cell area repaired and the starboard stringer replaced, now have the engine stringers fitted and ready to set in place. The only one left is the port side stringer by the fuel tank, the end where is was nailed to the 1/2 ply that tied the engine stringers together has a little rot, only on the end where nailed.........the h20 checks around 15 to 16 along the bottom of the stringer........not sure to replace or not at this point. Thanks !!
     
  7. PAR
    Joined: Nov 2003
    Posts: 19,126
    Likes: 498, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    15 to 16 is right on the boarder line in regard to what is possible with epoxy. If you're using extra slow, I can assume you're using West System epoxy. Try to dry these areas down to 13% as a minimum. If this is more pain in the butt then it's worth, cut it out and bond in a new piece.
     
  8. mcdc
    Joined: May 2012
    Posts: 70
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: North Carolina

    mcdc Junior Member

    Since the H20 was low, thought about cutting off the very end that started to show rot and leave alone since it is only about 2 inch long and about 1 deep. Question, on the bulk head that ties the engine stringer to the fuel cell stringher, should i go ahead and bed with epoxy PB or will i need something with more flex in such as small area.........it is a V shape as the hull and made od 1/2nch ply. Thanks for all the help!!
     
  9. PAR
    Joined: Nov 2003
    Posts: 19,126
    Likes: 498, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Post a picture so we can see what you're dealing with.
     
  10. mcdc
    Joined: May 2012
    Posts: 70
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: North Carolina

    mcdc Junior Member

    Here's a pic before iy was removed, it was taken from the transom looking forward into the cabin between the fuel stringers. Thanks
     

    Attached Files:

  11. mcdc
    Joined: May 2012
    Posts: 70
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: North Carolina

    mcdc Junior Member

    Forgot to say also that in the center of the fuel area floor (in the pic where it looks like two white lines in the tank area) Sea Ray layed a 1/2 ply by 8 inches down the length of the tank floor to create a flat floor. This is to support the tank so it has a large void under it where it meets the piece that ties the stringers together.
     
  12. PAR
    Joined: Nov 2003
    Posts: 19,126
    Likes: 498, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

  13. mcdc
    Joined: May 2012
    Posts: 70
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: North Carolina

    mcdc Junior Member

    heres a pic of the stringer by the fuel tank in question. The H20 checks 11-15 and only shows the spot in the edge. I pulled a 9x9 section of the 1/2 inch ply to look at the 3/4 so that is what you see. should i patch and epoxy or replace.Thanks
     

    Attached Files:

  14. PAR
    Joined: Nov 2003
    Posts: 19,126
    Likes: 498, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder


  15. mcdc
    Joined: May 2012
    Posts: 70
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: North Carolina

    mcdc Junior Member

    Ready to set the engine stringers today and wondered if I sould bed with epoxy or use something with more flex? The thickeded epoxy is hard as a rock.
     
Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.