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  1. 02-21-2018 05:42 PM #1
    motoryacht lover
    motoryacht lover is online now Senior Member
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    Proper sealant to use on hatch between “glass” and aluminum frame

    What is the proper sealant to use between the Lexan ?? And the aluminum frame of the hatch. These are bow hatches. Thanks for your time.
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  2. 02-21-2018 05:50 PM #2
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    Boatsb
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    Re: Proper sealant to use on hatch between “glass” and aluminum frame

    What's the aluminum coated with?
    Scott
    41C117 "Hattatude"
    Port Canaveral Florida.


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  3. 02-21-2018 06:22 PM #3
    motoryacht lover
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    Re: Proper sealant to use on hatch between “glass” and aluminum frame

    I don’t know.
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  4. 02-21-2018 06:48 PM #4
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    Re: Proper sealant to use on hatch between “glass” and aluminum frame

    lexan is Polycarbonate and I believe pure silicone is a good sealant. Aluminum could be painted, powdercoated, anodized or clean.

    Im not sure whats best for that bond.

    BobK please chime in.
    Scott
    41C117 "Hattatude"
    Port Canaveral Florida.


    Marine Electronics and Electrical Products Distributor.
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  5. 02-21-2018 09:03 PM #5
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    Re: Proper sealant to use on hatch between “glass” and aluminum frame

    I’ve seen silicon and 4200 used.
    SEVEN
    1979 53' MY Hull #563
    Antioch, California
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  6. 02-21-2018 11:03 PM #6
    motoryacht lover
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    Re: Proper sealant to use on hatch between “glass” and aluminum frame

    Thank you both for your help. I really appreciate it.
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  7. 02-22-2018 08:47 AM #7
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    Re: Proper sealant to use on hatch between “glass” and aluminum frame

    Quote Originally Posted by Boatsb View Post
    lexan is Polycarbonate and I believe pure silicone is a good sealant. Aluminum could be painted, powdercoated, anodized or clean.

    Im not sure whats best for that bond.

    BobK please chime in.
    Polycarbonate is very easily damaged by some solvents. I would check with a plastics supply house rather than reinvent the wheel. It is also not very UV resistant.

    Silicone caulks come in several flavors. The common one releases acetic acid when it cures which may damage the aluminum. An architectural polyurethane may be best if it will not damage the PC.

    Bobk
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  8. 02-22-2018 09:21 AM #8
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    Re: Proper sealant to use on hatch between “glass” and aluminum frame

    `Dow 895 is what is used by most that rebuild them.....Pat
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