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  1. #1
    Join Date
    Aug 2004
    Location
    Venice, Florida
    Posts
    7,353

    I need a thin slow cure epoxy.

    I finally figured out why my epoxy on my nosecone keeps blistering. When Eagle One installed the nosecone, he did not fill or cap off the speedometer pickup tube passage. Salt water sat in the pickup passage and corroded away at the aluminum causing blisters. I found this when I blew air in through one of the blisters and water shot out the top of the lower unit where the speedo pickup fitting would have been. I drained 8oz of salt water out of there! Also did not fill the cavity at the front of the lower unit but blocked the drains. Lucky it didn't bust when it froze here last winter.
    So....I need to fill this passage with a thin slow cure epoxy so it gets down and seals any little areas. I have a bottle of Mas epoxy with fast cure hardener but when I mix up 8 oz it will kick off very fast. Nobody around me sells Mas. Can use a slow cure hardener from West with my Mas? What can I do to thin it out. I need it almost like water. Should I just get a bottle of Git Rot and use that? I hate to drop $50 on git rot if there is a cheaper alternative.
    www.CoolWaterProducts.com
    Cool and Unique Boating and Fishing Products


    13' Biel tunnel AKA "Flight Risk"
    13" Modified Yamaha V4 - 94.1759375642 mph

    Fountain 23TE - Slow


  2. #2
    I haven't tried the West hardner with MAS, but I don't think it will work, for one the ratio's are different, but I suspect the fomulation is different as well. MAS does make a slow and med cure hardner and MAS is one of the thinner general puprose epoxies around, so ordering the slow cure might be the best bet.

    If you want something really thin, look at CPES epoxy - It flows almost like water (loaded with solvents that flash off when used to seal wood, not sure how it would work in the close section of your lower though), it's used a lot and you should be able to find more info out there. - If you want to try that, I have more then enough left over from my last project and can make you a good deal.

    There are also various postings about thinning epoxy - google

  3. #3
    Join Date
    Aug 2004
    Location
    Venice, Florida
    Posts
    7,353
    I didnt think west Marine carried Mas but it looks like they do. I wil probably just go get some slow hardener if they have it in stock. Will look into thinning. Thanks.
    www.CoolWaterProducts.com
    Cool and Unique Boating and Fishing Products


    13' Biel tunnel AKA "Flight Risk"
    13" Modified Yamaha V4 - 94.1759375642 mph

    Fountain 23TE - Slow


  4. #4
    Join Date
    Apr 2007
    Location
    port charlotte / punta gorda fl
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    i got some call me or ill be at the shop in the am till who knows
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  5. #5
    Join Date
    Jun 2010
    Location
    Rotorua New Zealand
    Posts
    1,012
    Never good to mix products from different manufacturers. West Systems is very good epoxy, I use it exclusively here in New Zealand. Maybe mix it up as straight epoxy resin for the liquid you require. Use slow hardener and slightly warm the resin before you apply it. (Stand container in hot water). This will help it run on application. You can always apply it with a syringe. Always mix with a large footprint to help it not to exotherm (cookup). Just add glue powder to the resin for sticking the nose cone on. Make sure you get a slow hardener and mix resin and hardener in accurate quantities. Everything needs to be very clean, no paint or other residues.

  6. #6
    Join Date
    Feb 2010
    Location
    Mount Hope, Ontario
    Posts
    408
    Could you use a syringe to inject it into the cavity? If so a regular epoxy may do the job.

  7. #7
    Join Date
    Jun 2010
    Location
    Rotorua New Zealand
    Posts
    1,012
    Quote Originally Posted by hometown45 View Post
    Could you use a syringe to inject it into the cavity? If so a regular epoxy may do the job.
    Yes you can. The way we repair a cored hull that has cavities is to drill a number of holes into the cavity and using a syringe inject resin till it comes out the other holes. We then know that the cavity is filled with resin so we then seal the holes with screws and wait for the resin to set.

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