Re: {Beneteau Owners} Leaking glass skylight is OUT!

[dbg...@mindspring.com]

is Silkaflex a beding compound, does it dry hard...

for port installs it is better to use a sealant which is soft and pliable...

make a bead around the port and gently install the port making sure the bead makes contact with both surfaces... secure BUT DO NOT FULLY TIGHTEN fasteners... this way the initial contact makes a gasket after it cures... ONLY after sealer has cured, finish tightening fasteners... at this point two seals will have been formed... one seal from contact adhesion... the other is a pressure seal has been formed by the gasket which can be re tightened as the seal ages

-----is SIlkaflexMessage-----
>From: Bill <wewag...@gmail.com>
>Sent: Sep 26, 2016 6:09 PM
>To: Benetea...@googlegroups.com
>Subject: {Beneteau Owners} Leaking glass skylight is OUT!
>
>It took a little bit of patience and a chemical called Relief and we got the large acrylic panel out without breaking it.
>My friend who helped couldn't believe that the window was leaking because I had recaulked the window and it looked perfect. He masked the leaking section off with putty and poured some water on it and you would think that there was no glass or caulking there. The water went straight down. It seems the caulking never adhered to the fiberglass.
>Slowly we pried the acrylic up using some Resolve and it came off. Took about an hour.
>Next step is to clean and use primer to make sure Silkaflex bonds.
>
>Bill
>
>Sent from my iPad
>
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[Mark J Wilme]

Sikaflex makes many products - depends which one is being used

Mark Wilme
Mark....@Gmail.com

+1 (508) 826 5607

www.linkedin.com/in/markwilme            

On Tue, Sep 27, 2016 at 12:47 AM, <dbg...@mindspring.com> wrote:

is Silkaflex a beding compound,  does it dry hard...

for port installs it is better to use a sealant which is soft and pliable...

make a bead around the port and gently install the port making sure the bead makes contact with both surfaces... secure BUT DO NOT FULLY TIGHTEN fasteners... this way the initial contact makes a gasket after it cures... ONLY after sealer has cured, finish tightening fasteners... at this point two seals will have been formed... one seal from contact adhesion... the other is a pressure seal has been formed by the gasket which can be re tightened as the seal ages

-----is SIlkaflexMessage-----
>From: Bill <wewag...@gmail.com>
>Sent: Sep 26, 2016 6:09 PM

>To: Beneteau-Owners@googlegroups.com

>Subject: {Beneteau Owners} Leaking glass skylight is OUT!
>
>It took a little bit of patience and a chemical called Relief and we got the large acrylic panel out without breaking it.
>My friend who helped couldn't believe that the window was leaking because I had recaulked the window and it looked perfect. He masked the leaking section off with putty and poured some water on it and you would think that there was no glass or caulking there. The water went straight down. It seems the caulking never adhered to the fiberglass.
>Slowly we pried the acrylic up using some Resolve and it came off. Took about an hour.
>Next step is to clean and use primer to make sure Silkaflex bonds.
>
>Bill
>
>Sent from my iPad
>
>--
>Largest Beneteau group, over **1121
>** members and growing.
>

>To post to this group, send email to Beneteau-Owners@googlegroups.com
>To unsubscribe from this group, send email to Beneteau-Owners-unsubscribe@googlegroups.com

>For more options, visit this group at http://groups.google.com/group/Beneteau-Owners
>contact denny.we...@gmail.com, or ume...@comcast.net  if you have a list management question
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[Bill]

Using Silkaflex 295 uv which is recommended by Silkaflex for bonding with acrylic and fiberglass.

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[Skip Ryan]

I live in Florida. Max heat.  I had a 390 - big windows. I've tried them all: Sikaflex, Dow, you name it.  The best?  GE SSG4000.  Sikaflex's adhesion didn't hold up after repeated expansion/contraction cycles.  Never had a problem with GE.

Skip

[DAVID Fletcher]

You may consider Dow 795. It has a different thickness than Sika.

Sika 295 is very thin and does not cling well. HARDER to squeeze into the gap.

From experience 295 is not easy to work with and you MUST use their expensive primer.  Be sure to prine  the edge of the glass. That is the area that leaked for me as I did not get that area covered well enough with the bonding agent.

795, IMO, is easier to work with and bonds better.

FLETCH

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[Bill]

This job is a little different. This is a skylight, there is nothing to screw in or clamp down, it just rests on gasket. We will apply Silkaflex to top of gasket which acrylic will rest on. Will have suction cups on the bottom of acrylic and will weight acrylic down from suction cups. Then we will do the caulking around the edge.

Bill


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[DAVID Fletcher]

I strongly suggest you get the instructions from Beneteau. Ask Todd 

I also did the sky lights in my 400 no fasteners

You need to use a bonding tape build a bead between two bonding tapes.

Seal the lens into place. Let it cure . Test it for leaks. 

Then you fill the cavity with a sealant like silicone. 

It is not a simple as you think.  I suggest you need to follow prove system.

Remember the seal is on bottom ledge which must remain flexible and about 10 mm in thickness.

Sent from my Samsung device

-------- Original message --------
From: Bill <wewag...@gmail.com>
Date: 2016-09-28 7:03 PM (GMT-05:00)
To: benetea...@googlegroups.com

[Bill]

Fletch,

You never mentioned bonding tape in your previous posts. What is it and what do you need it for?

Bill

PS: I just wrote to Todd

Sent from my iPad

[DAVID Fletcher]

Two purposes

Holds the lens high enough to form a thick gasket

 The lens will flatten the material before it cures. You want a 10mm height and 10  mm width to the bead.

Keeps the runny Sika from running all over your interior 

[Bill]

How does the tape keep the Silkaflex from running?

This is really a flat surface, so don't know how it will run.

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[DAVID Fletcher]

The tape is thick 8 plus mills it builds a bread up and when it skims you place the lens down.

Beneteau suggest spacers and filling the SPACER holes after

Do you self a favour and get the instructions fro. BENETEAU

[Bill]

I sent for them.

Thanks,

Bill

Sent from my iPad

[Bill]

I have a rubbers gasket about 1in or more in width with a channel down the middle that the acrylic rests upon.

Did you have this piece or did you remove it?

Bill

Sent from my iPad

[DAVID Fletcher]

Yes it was the same set up. A little tricky to get back in place. In my case a put a nice bead of Dow 795 on the corner and finished that way

[wewag...@gmail.com]

Why did you take it out?

Sent from my iPhone

[DAVID Fletcher]

Leaking.  Remember the importance of the painted area on the lens. It is there to protect the bond from UV which breaks down the adhesive sealant.

[DAVID Fletcher]

To a job with Sika 295uv you need at the least one tube of 295 and one can on 209. About 110.00 vesus Dow 795 which is about 15.00.

Your call

[Bill]

Now that your boat is safe I can reply.

You are right about Silkaflex being more expensive. Actually, much more expensive.

You need to buy: activator, primer, cleaner and product.

I used Silkaflex and it looks great and doesn't leak!

One big problem over, others pending, like leaking port. It never stops!

Bill

Sent from my iPad