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  1. #1
    RobZ71LM7's Avatar
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    Question Cure time for 4200 on intake grate fzr

    How long do I need to allow 4200 to cure on a R&D intake grate/seal kit install on an FZR? I may only get 48 hrs at best is this ok? I've seen some mention several days on other models. I wasn't sure if they had larger cavities.
    Last edited by RobZ71LM7; 08-24-2011 at 12:55 PM.


  2. #2
    Kelly_A's Avatar
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    Depends on temp & humidity - here's the spec sheet from 3M. I think 48 hours should do it, based on the relatively tight clearances between grate & hull.

    PDF - 3M 4200 Marine Sealant Spec Sheet

  3. #3
    lets race.... mikeFZR's Avatar
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    If it is fast cure 4200 than 24 hours is the cure time. However, I would let it cure for 48 hours if possible to ensure a good bond. Also, the higher the humidity the quicker it will cure. The 24 hour cure time is based on 50% humidity.

  4. #4
    RobZ71LM7's Avatar
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    Thanks for the information. I'm a novice when it comes to working on PWC's, but not cars and other things. I was going to prep the areas with 300 or finer grit sandpaper and clean with acetone is this acceptable? I see the specs for 4200 say no alcohol.

  5. #5
    Lightning Struck's Avatar
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    I wouldn't prep.. It'll stick..

  6. #6
    RobZ71LM7's Avatar
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    So nothing at all? I've never waxed it or anything like that so it is a virgin surface. It's never been in the water for more than a few hours. Just wipe any dirt off and go?

  7. #7
    Lightning Struck's Avatar
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    Yup.. I personally used 5200 on mine, because I didn't have 4200 available.. I just ran a bead around the mating surfaces like the Riva instructions said(even tho I used an R&D grate, it didn't include destructions), and bolt it up there. I waited 2 days out of water, and then let'er eat, even tho 5200 takes 7 days to cure. It ain't goin anywhere, and it isn't leaking, since there's really no where for it to leak.

  8. #8
    lets race.... mikeFZR's Avatar
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    You don't need to prep the surface, I would just wipe it off with some water and then dry it before you apply the 4200. Just dont use anything with alcohol, as you said.

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