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  1. #1
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    Marine sealants????

    Want some opinions on marine sealants, cant find the answers im looking for with the search function so here it goes:

    So before I bolt up my new power head I figure I might aswell tear down the transom and reseal all hardware. Question is what sealant will work the best? based on the information I can find the 3M 400UV should cover all my needs, ie: transom bolts, tow hooks, cleats, plastic seam cap, etc. what everyones opinion??? is 4000 the best all around choice? or should I get some 4200? does 5200 have any application here? any input would be appreciated.

  2. #2
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    4000 uv is the newest stuff. Should be very good since it has uv protection and is a poly. Just never use silicone.

  3. #3
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    well i know better now, just wish i did back when i put it all together. Gonna have alot of cleaning to do... and i really dont wanna have to worry for a couple 5 years.

  4. #4
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    I only ever use 5200. Stuff is gold in the boating world. Lots of little pieces of paper towel to wipe away excess. Or if you're doing long joints, you can lay down masking tape first, on both edges of the joint, squeegee it in with a credit card or plastic spoon, or your finger... then peel the masking tape up, and you get an absolutely perfect edge.

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  6. #5
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    I’ve seen it said in many places that 5200 is damn near permanent so if you want to ever take it apart don’t use it. Also it has poor bond to plastics and can even erode plastics. As per the data sheet 4000 appears to be the better universal choice but I always like to hear real world opinions.

  7. #6
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    Quote Originally Posted by derpid View Post
    I’ve seen it said in many places that 5200 is damn near permanent so if you want to ever take it apart don’t use it. Also it has poor bond to plastics and can even erode plastics. As per the data sheet 4000 appears to be the better universal choice but I always like to hear real world opinions.
    Permanent?! nah. Not on engine bolts through a transom anyway. That's what a hammer and 3/8" extension are good for. Banging them out lol.

  8. #7
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    Use the primer and correct procedure and it is permanent.......It will rip the gell coat off the fiberglass laminate if you remove something.

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  10. #8
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    Boat Life makes some good sealants that we like to use. PS if you keep 5200 in the freezer after opening it, it will last a long time.

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  12. #9
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    There is a release agent for 5200 5215 maybe came in small squirt bottle score and spray and will release.

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  14. #10
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    Quote Originally Posted by delawarerick View Post
    There is a release agent for 5200 5215 maybe came in small squirt bottle score and spray and will release.

    I would use 4200, been there, done ^ this


    is gone


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  16. #11
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    Quote Originally Posted by XstreamVking View Post
    4000 uv is the newest stuff. Should be very good since it has uv protection and is a poly. Just never use silicone.
    Splain it Lucy, why never use silicone???? GE used to make a black adhesive/sealant that I used on everything, but it was kinda free, stole it from the crib, don't repeat that.

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