Results 1 to 15 of 15

Thread: K5 polyurea bottom on Wooldridge Alaskan

  1. #1
    Member Hoyt's Avatar
    Join Date
    Apr 2006
    Location
    Fairbanks
    Posts
    1,160

    Default K5 polyurea bottom on Wooldridge Alaskan

    I wanted to protect (and make it more slick) the bottom of my Alaskan. As it has a ribbed bottom, adding UMHW would be really tough, plus add a ton of weight. After doing a lot of research, with a couple guys from work (Wooldridge owners as well), we discovered K5 polyurea. If you haven’t seen it or heard of it, do a google search and check out the videos that pop up. It’s an amazing product, having being used by the military for years as a blast mitigation coating. Anyway, we ended up finding out that Universal Welding in North Pole is a Vendor/applicator for the product. A couple of us guys decided to give it a shot. I’m pretty happy how it turned out, and I hope it works well. Universal guarantees the K5 spray. We also added a top coat product called Wetlander (super slick silicone based coating they use on airboats). Universal agreed to apply that product on the K5 for us. The total weight added to my boat was around 50lbs, much lighter than UMHW. Also it required no holes or glue etc. I believe Phantom boats have mostly gone away from UMHW, and are spraying their boats with k5. I also talked with Wooldridge, and they said this would not void my hull warranty. Anyway here are a couple pictures of how it turned out. I cannot wait to get it on the rivers this year!







    "If I could shoot a game bird and still not hurt it, the way I can take a trout on a fly and release it, I doubt if I would kill another one." George Bird Evans

  2. #2
    Member Akgramps's Avatar
    Join Date
    Apr 2008
    Location
    Last civilized place on the planet
    Posts
    2,183

    Default

    That looks good, I have wanted to do the UHMW, except for all the holes, and the weight... Keep us posted, wont be too much longer.
    Nothing worth doing is easy
    TR

  3. #3
    Member Sobie2's Avatar
    Join Date
    Jul 2006
    Location
    Juneau
    Posts
    1,064

    Default

    Here in Juneau, I know a guy who put Wetlander on his sport jet powered home built 22'. It is slick stuff. So it works as advertised. What you don't get compared to UHMW is the impact resistance. So you will still dent your hull, but it will also slide around gravel and logs. Definitely a cost effective alternative. Good stuff.

    Sobie2

  4. #4
    Member
    Join Date
    Aug 2015
    Location
    Alaska
    Posts
    173

    Default

    Looks pretty good. I would like some before and after pictures of the bottom after gravel bar sliding. I have researched the K5 and it seems to be bullet proof. What did they charge you?

  5. #5
    Member oakman's Avatar
    Join Date
    Apr 2007
    Location
    Eagle River, Alaska, United States
    Posts
    1,210

    Default

    Quote Originally Posted by Sobie2 View Post
    Here in Juneau, I know a guy who put Wetlander on his sport jet powered home built 22'. It is slick stuff. So it works as advertised. What you don't get compared to UHMW is the impact resistance. So you will still dent your hull, but it will also slide around gravel and logs. Definitely a cost effective alternative. Good stuff.

    Sobie2


    This stuff looks pretty thick. I would think it should take a little abuse. I don't have any experience with this or UHMW though. What kind of impact can UHMW take without denting the hull?

  6. #6
    Moderator bkmail's Avatar
    Join Date
    Apr 2006
    Location
    Palmer, AK.
    Posts
    4,333

    Default

    The spray on polyurea is much thinner than uhmw and does not provide the protection of uhmw, nor is it as slick.
    The diff in thickness is obvious, as seen here as applied on an airboat vs a new roll of uhmw:


    We install uhmw on the bottom of jetboats all the time without drilling any holes, using our weld washer application method:


    The other is our thru hull bolts that leaves a completely slick bottom, nothing to catch on rocks and stretch the bolts. These are not plugs but a completely bonded uhmw applied around a carriage bolt.
    In short, the spray on works fine but its not a substitute for the uhmw if you have severe duty use.
    Also, it will be a bear to remove and really puts a kink in any future welding on the applied areas.
    I think its great for smaller boats, cost savings, etc.... but its not a substitute in my opinion.
    Bk


    Sent from my iPhone using Tapatalk
    BK Marine Services 232-6399
    Alaskas only Planar diesel heaters dealer, service, warranty, and installation.
    Alaskas only Lonestar drum winch dealer, Whirlwind props, Stinger gearbox, and Alumatech airboats.
    Www.bkmarineservices.com

  7. #7
    Member Sobie2's Avatar
    Join Date
    Jul 2006
    Location
    Juneau
    Posts
    1,064

    Default

    Quote Originally Posted by oakman View Post
    This stuff looks pretty thick. I would think it should take a little abuse. I don't have any experience with this or UHMW though. What kind of impact can UHMW take without denting the hull?
    You can take a sledge hammer to a UHMW protected hull and not have any damage. Wetlander will adhere and flex to the hull but your boat will still get dented.

    Sobie2


    Sent from my iPhone using Tapatalk

  8. #8
    Member oakman's Avatar
    Join Date
    Apr 2007
    Location
    Eagle River, Alaska, United States
    Posts
    1,210

    Default

    great info guys. Might have to think about this for my next boat!

  9. #9
    Member
    Join Date
    Aug 2013
    Location
    Interior
    Posts
    26

    Default

    Quote Originally Posted by Sobie2 View Post
    You can take a sledge hammer to a UHMW protected hull and not have any damage. Wetlander will adhere and flex to the hull but your boat will still get dented.

    Sobie2

    Sent from my iPhone using Tapatalk
    Wetlander is simply to make the bottom slicker to slide over gravel bars or other obstacles, it is not intended for impact protection.

    The K5 polyurea can be applied in any thickness desired and is what provides the impact protection. If it was applied to an equal thickness as UHMW, it would have equal or better impact resistance.

    The two products combined make a great alternative to the UHMW. UHMW certainly has it's place, but is not the preferred solution for everyone.

  10. #10
    Member
    Join Date
    Feb 2011
    Posts
    2,009

    Default

    Polyurea and other types of spray on bedliner stuff is great short term. It has been used if fish holds of aluminum boats for years. If any corrosion starts under it it spreads like wildfire. It takes way too much work to remove to make repairs. It is more flexible and softer than UHMW and will allow aluminum to dent from impact.

  11. #11
    Member Hoyt's Avatar
    Join Date
    Apr 2006
    Location
    Fairbanks
    Posts
    1,160

    Default

    Quote Originally Posted by Sobie2 View Post
    Here in Juneau, I know a guy who put Wetlander on his sport jet powered home built 22'. It is slick stuff. So it works as advertised. What you don't get compared to UHMW is the impact resistance. So you will still dent your hull, but it will also slide around gravel and logs. Definitely a cost effective alternative. Good stuff.

    Sobie2
    The benefit here is that its not just Wetlander. The K5 will take care of the impacts. The Wetlander is just an additional topcoat.
    "If I could shoot a game bird and still not hurt it, the way I can take a trout on a fly and release it, I doubt if I would kill another one." George Bird Evans

  12. #12
    Member Hoyt's Avatar
    Join Date
    Apr 2006
    Location
    Fairbanks
    Posts
    1,160

    Default

    http://specialty-products.com/pdf/ar...%20Article.pdf

    This is just an alternative or another option. Like anything there will be limitations etc. great for boats like the Wooldridge that has ribs. Its not for everyone. Just another option. Much lighter than UMHW. Im also dont beat the crap out of my boat. For folks that go to the extreme this may not be the best option. I run the Salcha and Chena mostly. Lots of river gravel etc. I think this stuff will hold up great for my use. The K5 is guaranteed and Wooldridge said it would not void my warranty.
    "If I could shoot a game bird and still not hurt it, the way I can take a trout on a fly and release it, I doubt if I would kill another one." George Bird Evans

  13. #13
    Member Hoyt's Avatar
    Join Date
    Apr 2006
    Location
    Fairbanks
    Posts
    1,160

    Default

    https://youtu.be/njsZW81_Aec

    Phantom is a big fan after years of research
    "If I could shoot a game bird and still not hurt it, the way I can take a trout on a fly and release it, I doubt if I would kill another one." George Bird Evans

  14. #14
    Member nater11's Avatar
    Join Date
    Apr 2017
    Location
    Eagle River
    Posts
    26

    Default

    I would definitely be interested to see how this works. Please post some bottom pics after scraping a few gravel bars. I think it might be a good option to slick up my steel skid....

  15. #15
    Member Hoyt's Avatar
    Join Date
    Apr 2006
    Location
    Fairbanks
    Posts
    1,160

    Default

    Quote Originally Posted by nater11 View Post
    I would definitely be interested to see how this works. Please post some bottom pics after scraping a few gravel bars. I think it might be a good option to slick up my steel skid....
    It will be interesting to see how this turns out. Ill be sure to update.
    "If I could shoot a game bird and still not hurt it, the way I can take a trout on a fly and release it, I doubt if I would kill another one." George Bird Evans

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •