Divinycel question

Discussion in 'Fiberglass and Composite Boat Building' started by fallguy, May 22, 2026 at 4:31 PM.

  1. fallguy
    Joined: Dec 2016
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    Location: usa

    fallguy Boat Builder

    I want to bond the 80 weight Div foam to my hullsides 2 part poly paint with 5200 for bond strength and open time.

    The only question is whether I ought to precoat the foam with epoxy to make a more uniform surface.

    @rxcomposite Do you know?

    … or anyone else know if best to bond the 5200 to the rougher surface or to epoxy?

    I did some hole fill and minor repairs with epoxy/cab mix.

    The surface gets harder with epoxy is all. So, it seems like it would be a bit tougher even in handling before the work.

    thanks

    Dan
     
  2. rxcomposite
    Joined: Jan 2005
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    Location: Philippines

    rxcomposite Senior Member

    5200 is a very good adhesive. We used to bond our hardware with 5200 to a gel coated fiberglass and it is almost impossible to separate. The adhesive will bond to wood, glass, metal, ceramic, or anything that has a good substrate.

    Coating the foam with epoxy is a good idea. Better if you add fiberglass.
     
  3. fallguy
    Joined: Dec 2016
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    fallguy Boat Builder

    I think I’ll try to glass the backside, just to make the 20’ long part more resilient to damage prior to application.

    I am going to get the boat on the hard as soon as the pieces are done.
     
  4. rxcomposite
    Joined: Jan 2005
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    rxcomposite Senior Member

    Is that the chine strip core you are bonding?
     
  5. fallguy
    Joined: Dec 2016
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    Location: usa

    fallguy Boat Builder

    Yes. Spray rail.

    I glassed one side of one of the 4 pieces today.
     

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