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Old 23-11-2020, 06:52   #1
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Glass window sealer help! STevens 50

Hello salty sailors. I have a question on what is the best product to use. I have some glass windows that wrap around my rise saloon in my Stevens 50 PH. Of course the windows are leaking. I will eventually pull them out and rebed them but looking for a good solution to carry me to next season at least and save the wood inside until then. This is a new to me boat. The previous owner looks like he applied what I think is silicon over the seam of the window. I have removed a a piece and uploaded some pictures. As you can see there is a clear sealer over a black one that i think is the original one. My plan is to remove as much of the current sealer as possible new and old and then reapply new sealer but I am unsure of what to use. Since and if it was silicon that was applied to the window will that have a bearing on what kind of sealer I can use? I heard that once silicon is applied nothing will stick there again very good is this accurate? What material and technique would you guys recommended? Should I use different sealer on inside of the window ( glass side) and outside of frame?
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Old 23-11-2020, 09:11   #2
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Re: Glass window sealer help! STevens 50

You're right, in that nothing wants to stick to silicone, including silicone.
The process for removing silicone caulk (residue) takes some time and effort.
1. Tear off the bulk of the caulk. (As youíve done)
2. Use a razor blade to scrape off as much of the residue as possible without scratching the surface you are cleaning.
3. Apply mineral spirits or denatured alcohol to the residue (silicone 'oil').
4. Brush away any bits that "pill" and become detached.
5. Rinse & repeat.
6. Dry, before applying new caulk.
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Old 24-11-2020, 17:37   #3
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Re: Glass window sealer help! STevens 50

Thanks for the advice. any suggestion on what sealant to use?


Thanks
D
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Old 24-11-2020, 18:21   #4
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Re: Glass window sealer help! STevens 50

Quote:
Originally Posted by Disielcustoms View Post
Thanks for the advice. any suggestion on what sealant to use?


Thanks
D

Any place that replaces car windscreens should be able to tell you about the sealer. I'm sorry I cant remember what it is called.

That stuff sticks like s... to a blanket but clean the silicone off as suggested.

Someone else will be along with a "marine" product.
We had good success on polycarbonate windows with a product called Seal once but its a PITA to work with. Forms long sticky threads & I cant remember if its good for glass but I think so
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Old 24-11-2020, 18:23   #5
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Re: Glass window sealer help! STevens 50

Sika 295 for acrylic windows, 296 for glass.

https://dnk.sika.com/dms/getdo...Bon...pplication.pdf

I have had lousy luck stopping window leaks without removing and rebedding. How your luck is better.

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Old 24-11-2020, 18:46   #6
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Re: Glass window sealer help! STevens 50

Door & window sealant from the big box stores. Agree with others that itís a futile exercise but itíll help for a while. When you re-bed the windows, Dow Corning 795 in combination with 3M VHB tape. You have to calculate the required minimum thickness of the bead, research that. You get that thickness by stacking layers of VHB tape.
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