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Old 25-11-2022, 08:39   #1
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double sided tape for hatch window on beneteau

the hatch windows on our beneteau oceanis 41.1 have come loose and we need to affix them with new double sided tape, what tape brand / reference is reccommended
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Old 25-11-2022, 09:08   #2
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Re: double sided tape for hatch window on beneteau

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the hatch windows on our beneteau oceanis 41.1 have come loose and we need to affix them with new double sided tape, what tape brand / reference is reccommended
Thatís an easy one: 3M VHB tape. You can select width and thickness. Google this because it depends on the size of the windows (bigger windows require thicker tape.

After that you still need to seal the outside edges to prevent water ingress. Use a UV stabilized glazing caulk for that.
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Old 25-11-2022, 09:10   #3
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Re: double sided tape for hatch window on beneteau

"3M VHB" is the only brand of double side tape I've ever heard anyone use for windows, but that is the US, you might have excellent local brands we don't have.
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Old 25-11-2022, 09:19   #4
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Re: double sided tape for hatch window on beneteau

Would also consider using a structural silicone to caulk them in place, instead of tape.

We used this on our hatch acrylic for >10 yrs and still going strong.
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Old 26-11-2022, 05:54   #5
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Re: double sided tape for hatch window on beneteau

There is a Sika product ideal for this
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Old 26-11-2022, 06:53   #6
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Re: double sided tape for hatch window on beneteau

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Would also consider using a structural silicone to caulk them in place, instead of tape.

We used this on our hatch acrylic for >10 yrs and still going strong.

Last time I did this (on a Hunter) I used both.


VHB strips to hold the window in place on the caulk bead while the adhesive caulk cured. That is the usual recommendation. It works great but you only get one chance to get it right.
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Old 26-11-2022, 06:58   #7
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Re: double sided tape for hatch window on beneteau

What Bill O said ! I called Dow Corning tech as I was having an adhesion problem with my hatch lenses using silicone ! They said to use 1200 OS primer ! Their product ! It made all the difference in the world ! You put some on a clean rag, wipe the area for the silicone to be put on, especially the cut edges, wait till dry about 30 seconds mount and that is it ! You actually have to cut off the silicone to get it off ! So that being said I did use Dow 795 high strength as Bill O said ! It's been 5 yrs ! No issues at all !
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Old 26-11-2022, 07:06   #8
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Re: double sided tape for hatch window on beneteau

Dow Corning 795 is a great product but not as great as 3M VHB tape. The OP is in Cartagena, Colombia and the VHB tape will be available, as well as a good window and door caulk that is used for the edges.

The problem with using a liquid adhesive is bead thickness. Ideally you must make spacers that determine that thickness which is needed to deal with heat expansion. With VHB tape you simply select the correct thickness of tape and you canít squish it out when you press the window in. And this leaves an easy gap around the perimeter for caulk.
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Old 26-11-2022, 09:14   #9
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Re: double sided tape for hatch window on beneteau

For our hatch acrylic we did use the Dow 795 and we did appropriately size the acrylic to allow for the proper bead thickness. It wasn't too hard to use a spacer on a horizontal surface, but would be slightly more difficult to do this on verticals (fixed side lights, etc.).

While the 795 is typically what comes to mind when someone mentions "structural silicone", there are other brands which should be looked at for their intended use. For example, 795 states it needs a primer when used w/SS. For SS we use the structural silicone,GE SCS2000 (Silpruf), since it doesn't need a primer. There are more brands out there, so read the instructions before use.
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Old 27-11-2022, 01:06   #10
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Re: double sided tape for hatch window on beneteau

Lewmar have specific recommendations email them
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Old 27-11-2022, 04:46   #11
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Re: double sided tape for hatch window on beneteau

I used 3m 5952 for the fixed windows on my moody followed up with Dow 795 for the Sealant.

But my lewmar ocean series deck hatches, I used a combination of Dow 795 and butyl tape
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