Never Wet

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  • July 25, 2015 8:15 PM
    Reply # 3449364 on 3188408

    Hm.  It's looking like hydrophobic (that is, 'water-hating') coatings are coming in, and are begging for a trial as bottom paint on a boat.   Here, read this, don't be put off much y the title or the theme.  This stuff is touted as being extremely hydrophobic, note the underwater antifouling possibilities.....


       http://www.theguardian.com/us-news/2015/jul/26/relief-as-san-francisco-tests-out-urine-repellent-paint


    If these coatings are silicon based or contain silicon, your bottom may never hold a coat of another kind of paint.


    Joe Kovacs

    SV Sea Breeze

    Savannah GA USA

  • July 26, 2015 5:54 AM
    Reply # 3449760 on 3188408

    Interesting Joe.    If the whole hull was truly hydrophobic, it would change the drag coefficient, which would attract interest from racers, which would finance more R&D ...


    I've also read that the Feds have the goal of outlawing all toxic bottom paints.  But they can't really do that until there is a fully viable alternative.  Again, there could be handsome payoffs for successful R&D in this field.



  • August 28, 2015 10:43 AM
    Reply # 3500343 on 3188408

    Guys, The Neverwet option is intriguing but will have to wait for my next haul-out (unless I spring for a spare prop), but I heard about an older trick that makes me scratch my head. According to a reliable source, blackening the entire prop with a Sharpie permanent marker will also retard barnacle growth.  Cheap fix if it really works.  Has anyone else ever heard of such a treatment?  -Tom

  • August 30, 2015 5:29 AM
    Reply # 3502028 on 3188408

    Hi Thimas,  


    I tried it.  Didn't work for me.  But other friends swear that they tried it with success.  Go figure.


  • August 30, 2015 7:35 AM
    Reply # 3502108 on 3188408
    Deleted user

    Zinc paint prop grease and a plastic bag.  Plastic bag on prop when anchored for long periods of time?


  • December 26, 2015 9:08 AM
    Reply # 3719851 on 3188408

    I have a discouraging follow-up report on the Never Wet.

    This fall, before splashing Tarwathie, I cleaned the prop and put on two new coats of Never Wet.  I was looking forward to providing a report next spring.  

    If you recall, my last test was spoiled when the bottom diver scraped my prop even though it was clean.  He scraped the Never Wet off.

    Now for the discouraging part.  Under sail on the way south, we encountered a dense field of lobster traps on a moonless, starless night in Florida Bay.   Four times I hooked a trap in the gap between hull and rudder.  (Yes I do have a metal tab going across that gap to prevent fouling that way but for some reason it didn't work.)  Four times, I freed the lines by backing up up 100 m or so. I was not about to go diving down there at night.  

    On the fourth time, the Styrofoam ball hit the spinning prop.  Styrofoam flew in all directions.  Unfortunately, so did my Never Wet.  Only a week later, new barnacles were growing on the prop.

    So, I stand by what I said before about Never Wet.  it is extremely effective as a propeller anti-foul.  But it is also very fragile and easily rubbed off.



  • December 27, 2015 2:50 PM
    Reply # 3721039 on 3188408
    Anonymous member (Administrator)

    Dick:  Sounds like you were in a mine field of lobster traps!!  

    Next time you are on the hard -  here is a different way to guard the rudder.  This idea will works with or w/o hull fairing.  

    I've watched while this Westsail 32 straddled  two floats -- the floats submerged -- then popped up astern. 

    HTH 

    Jay 

      

  • August 07, 2016 2:39 PM
    Reply # 4177420 on 3188408
    Deleted user

    I just dove down on TAMZIN to check the zinc and clean the prop, there were eleven barnacles, I counted them just eleven.  Normally after about six months or so the prop would be so fouled that I couldn't back out of the slip.  It has now been 28 months since TAMZIN was in the yard and when I polished and then sprayed the prop with Never Wet.  The stuff works great.

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