EVA foam decking

Discussion in 'Installation Photos/Specs' started by mstang64bb, Jul 8, 2017.

  1. Fly'n Family

    Fly'n Family Active Member

    670
    Sep 19, 2013
    TX / CO
    2002 Cruisers Yachts 3870
    2003 Boston Whaler Sport 130 w/40 hp Merc
    Twin 425hp Crusaders
    So checked it this afternoon, all dry - and the power washing at a low setting did a real nice job. Got everything except a couple of spots that will require soap and a brush. I'll be doing it this way moving forward......a KISS theory approach with good results.
     
    Strecker25 likes this.
  2. douglee25

    douglee25 Well-Known Member

    Jan 13, 2008
    Dallas, TX
    Cruisers 3575
    Twin 7.4l
    Twin 7.4l
    The decking can fail from high heat, especially from concentrated sun reflection straight off of gelcoat. In fact in their literature, they don't warranty that type of failure.
     
  3. Riptide III

    Riptide III Active Member

    475
    Dec 8, 2007
    Dartmouth MA
    1997 Sea Ray 400DA
    Cat 3116 TA
    1994 Sea Ray Laguna CC Twin 135 Mercs
    :
    Dumbest thing I ever heard of. Let's make a product. Market it for boating. Charge close to 4 grand. Oh yah, just don't use it near shiny gelcote I the direct sun. Way to go seadek! Next time I'll read the fine print.
     
  4. douglee25

    douglee25 Well-Known Member

    Jan 13, 2008
    Dallas, TX
    Cruisers 3575
    Twin 7.4l
    Twin 7.4l
    Isn't it. Horrible if you ask me.
     
  5. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    You guys really think this stuff fails under typical reflections coming from some well polished gelcoat? Come on now....let's be realistic. Sea Dek is everywhere. If it were failing in this manner I think we'd all have heard about it.

    Out of curiosity I read the warranty this AM. It specifically states it does not warranty the product at temps exceeding 165 degrees F. Unless the sunlight is being focused by a convex surface or some other optical feature on the boat you're not getting to 165 degrees F. You may be really good at waxing but this would be pretty extreme. :)
     
    jrybak likes this.
  6. douglee25

    douglee25 Well-Known Member

    Jan 13, 2008
    Dallas, TX
    Cruisers 3575
    Twin 7.4l
    Twin 7.4l
    I'm sorry to say but your assumptions are false. There are many documented cases of it failing from normal use. I've been using EVA foam for over 20 years now. SeaDek is not proprietary. They just do a good job at marketing. Even back then it failed starting at the edges. It gets hard, shrivels, and peels away from the surface. It was so cheap back in the day that no one gave a shit. Peel it up, pattern a new piece, and contact cement the piece down, silicon the edges. Done. Now that that SeaDek is in the market, they charge somewhere between $30-$40 per square ft installed. It used to be priced at $2.50/sq ft. How is that for mark up? And SeaDek won't stand behind it because they can't. It's truly not the best material for high temperatures but everyone uses it regardless. It's a gamble but it sure does feel good on your bare feet.
     
  7. scooper321

    scooper321 Active Member SILVER Sponsor

    754
    Jul 4, 2015
    Baltimore, MD
    "Shenanigans", 2003 Sea Ray 400DB
    "Lollygagger", 2003 Sea Ray 320DA (listed for sale)
    Twin Cummins 6CTA-8.3
    One of the things the MarineMat dealer that I spoke to recently pointed out was that they use a primer around the edges. He didn't specify what that was, but he indicated it made a more robust seal, minimizing the edge peeling, shriveling. That's the only person I've heard make mention of taking an additional step when installing for securing the edges. And that includes a lot of reading on line (here and other forums).

    Does anyone know about the install process? Everything I read is simply "peel and stick".

    MarineMat also has their snap-in option, where they actually hem/bind the edges. That would certainly protect the edges, and it may help stop them from curling. But you'd have to be OK with a snap-in solution...
     
  8. douglee25

    douglee25 Well-Known Member

    Jan 13, 2008
    Dallas, TX
    Cruisers 3575
    Twin 7.4l
    Twin 7.4l
    The primer may be some sort of wax/grease remover to promote adhesion (something every installer should be doing anyway). The silicone we used prevented water from getting under the seams.

    I can't comment specifically on the snap in option. What I will say is that I'm not really sure how they would offer this type of solution because the foam tears very easily. Up until recently all installations were done with weldwood contact cement. It wasn't until lately that manufacturers started offering peel n stick options. Previously as soon as a side lifted, it would tear with any foot traffic. To have an entire install done with snaps where it isn't glued down is beyond me?
     
  9. scooper321

    scooper321 Active Member SILVER Sponsor

    754
    Jul 4, 2015
    Baltimore, MD
    "Shenanigans", 2003 Sea Ray 400DB
    "Lollygagger", 2003 Sea Ray 320DA (listed for sale)
    Twin Cummins 6CTA-8.3
    I don't know, either. But apparently MM has figured out a way to do it... reliably. And it's unique enough (?) that they've filed patents on it:

    https://www.tradeonlytoday.com/industry-news/marine-mat-close-gaining-patent-eva-foam-traction-mat

    This is an older article, but I believe several new boat mfrs have been installing this from the factory. We saw several at a show over the weekend - Monterrey was one I remember by name.
     
  10. douglee25

    douglee25 Well-Known Member

    Jan 13, 2008
    Dallas, TX
    Cruisers 3575
    Twin 7.4l
    Twin 7.4l
    Definitely doesn't appear to be anything special by looking at it. Interesting.
     
  11. Quint4

    Quint4 Well-Known Member TECHNICAL Contributor SILVER Sponsor

    Oct 6, 2006
    S.W. Ohio
    330 Sport Bridge
    5.7 MPI 350 Merc Bluewaters
    I saw some snapped in at a boat show.
    snap in .jpg
     
  12. Bridog

    Bridog Well-Known Member GOLD Sponsor

    Oct 4, 2006
    Gulf Shores AL / Brick NJ
    2016 19SPX OB
    Mercury 150 4S OB
    Looks like they applied a different backing to the snap on version of SeaDek. Perhaps to strengthen it. I was surprised how thin this EVA stuff really is. That said, it sure looks great and feels comfortable on the feet.
     
  13. douglee25

    douglee25 Well-Known Member

    Jan 13, 2008
    Dallas, TX
    Cruisers 3575
    Twin 7.4l
    Twin 7.4l
    I thought it looked like the same backing to me? What do you recall it looking like?
     
  14. scooper321

    scooper321 Active Member SILVER Sponsor

    754
    Jul 4, 2015
    Baltimore, MD
    "Shenanigans", 2003 Sea Ray 400DB
    "Lollygagger", 2003 Sea Ray 320DA (listed for sale)
    Twin Cummins 6CTA-8.3
    I am pretty sure that’s Marine Mat, not Seadeck. I think that’s the thing they (MM) have the patent on.
     
  15. Bridog

    Bridog Well-Known Member GOLD Sponsor

    Oct 4, 2006
    Gulf Shores AL / Brick NJ
    2016 19SPX OB
    Mercury 150 4S OB
    I could be mistaken, but I thought the SeaDek I installed was a flat black adhesive backing.
     
    douglee25 likes this.
  16. Bridog

    Bridog Well-Known Member GOLD Sponsor

    Oct 4, 2006
    Gulf Shores AL / Brick NJ
    2016 19SPX OB
    Mercury 150 4S OB
    Ok, that makes sense now.
     
  17. Riptide III

    Riptide III Active Member

    475
    Dec 8, 2007
    Dartmouth MA
    1997 Sea Ray 400DA
    Cat 3116 TA
    1994 Sea Ray Laguna CC Twin 135 Mercs
    :
    It is failing! Do I need to take pictures of mine to show you? As I stated earlier, if you bothered to read, there is a line at the transom door where the sun reflects down off the gelcote that has shrunk the material and hardenned it, or maybe you think I am just talking out of my a$$
     
  18. Bridog

    Bridog Well-Known Member GOLD Sponsor

    Oct 4, 2006
    Gulf Shores AL / Brick NJ
    2016 19SPX OB
    Mercury 150 4S OB
    Your not imagining it. Not covered under warranty.
    http://www.seadek.com/documents/4-26 - TAB - Light Amplification.pdf
     
  19. 370Dancer

    370Dancer Active Member

    729
    Oct 2, 2006
    Florida - Alabama
    1998 370 Sundancer
    380hp MAG MPI V drives
    Light grey with white "caulk" lines. Easy on the feet and no heat, even in Florida. Wash with a wide spray Harbor Freight pressure washer. 8 months, and still looks new. So cheap, that I can pull a section up and replace at any moment if it gets damaged. 370 Sundancer full cockpit and dive platform done. Doing the AB Nautilus next, and then pull the Sea Dek off of the Yamaha AR190 swim platform, and do it over, and then the cockpit. Search my username for pics in other posts.
     
  20. douglee25

    douglee25 Well-Known Member

    Jan 13, 2008
    Dallas, TX
    Cruisers 3575
    Twin 7.4l
    Twin 7.4l
    Saw your info here - https://www.dropbox.com/sh/xduzf8tggrg7xz0/AAAvQ8S0BiAI47Hu67fJ0DLra?dl=0

    Can you post some more details about the way you patterned it?
     

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