Silicone Sealant

ftodaro · 04-07-2017, 04:09 PM

I will be replacing the outer shell of my sky light, Due to cracking so i am just going to replace it.

I called a Winnebago dealer to order order the sky light, and gave him the part numbers from my sealant call out sheet. The Dealer advised that the correct product for my skylight is "NuFlex 311 Self Levelling silicone sealant.

I have also seen the same advice on a video that was referenced here on many posts about sealing the roof top surfaces.

So my question, i see many posts of folks saying NOT to use silicone sealant and nothing will stick to it. As i understand this Silicone sealant is what they used at the factory and in years past i have layered Dicor over top of it with no issues.

Is this advice against Silicone a different kind of Silicone ?

Unplanned · 04-07-2017, 04:16 PM

Silicone is very sticky, and I wouldn't be afraid to use it.

Ray,IN · 04-07-2017, 09:55 PM

I will never use silicone sealant again on anything in/on the RV. It does not adhere well-long term to slick surfaces. There is a reason silicone sealants are the lowest price sealants sold.
I have not however, seen or used the brand you listed, just the ordinary silicone sealant.

FIRE UP · 04-08-2017, 10:30 PM

Quote:

Originally Posted by ftodaro

I will be replacing the outer shell of my sky light, Due to cracking so i am just going to replace it.

I called a Winnebago dealer to order order the sky light, and gave him the part numbers from my sealant call out sheet. The Dealer advised that the correct product for my skylight is "NuFlex 311 Self Levelling silicone sealant.

I have also seen the same advice on a video that was referenced here on many posts about sealing the roof top surfaces.

So my question, i see many posts of folks saying NOT to use silicone sealant and nothing will stick to it. As i understand this Silicone sealant is what they used at the factory and in years past i have layered Dicor over top of it with no issues.

Is this advice against Silicone a different kind of Silicone ?

There are many folks that have an issue with Silicone. I've used it for decades without any issues. There are multiple sealants/adhesives out there for the choosing. Winne does change them from time to time. Our coach is an '04 and the sealant callout sheet does have some differences on what was then used, and what's used now.

I suspect that the "Silicone" that was recommended to you BY Winnebago, is the proper sealant/adhesive to use, in your situation. As long as all the surfaces are clean and prepped well, what they recommend will work.
Scott

ftodaro · 04-09-2017, 07:07 PM

I am going to go with what was recommended. My plan is to clean the surface well and use some scotch bright to rough it up a little. Clean it well and do it on a hot day. I can report back from time to time but i suspect it will be years before i have any good data.

I was on top of the roof today. some of the caulking up there is in good shape and some not so good. I need to do the entire side drip rails on both sides with Manis bond 75-am as recommended for that location. Owning a 16 year old Motor home can be part time job. Thanks for you input on this project, I will be posting questions about the others on my list.

Ray,IN · 04-10-2017, 05:41 PM

Quote:

Originally Posted by ftodaro

I am going to go with what was recommended. My plan is to clean the surface well and use some scotch bright to rough it up a little. Clean it well and do it on a hot day. I can report back from time to time but i suspect it will be years before i have any good data.

I was on top of the roof today. some of the caulking up there is in good shape and some not so good. I need to do the entire side drip rails on both sides with Manis bond 75-am as recommended for that location. Owning a 16 year old Motor home can be part time job. Thanks for you input on this project, I will be posting questions about the others on my list.

I redid mine last year, I used a thin coating of Dicor self-leveling, it ran down in the crack between drip rail and roof covering and filled the crack. I did have some cleanup work to do after it cured.

RVLover357 · 04-12-2017, 01:27 PM

Composet Products offers some sealants that work really well. Call that guy up and see what he recommends

JUS1MO · 04-12-2017, 01:57 PM

I have used 100% Silicone for a lot of different uses over the years. It works very well for some things and not quite as well for others. It will glue a rear view mirror back in place on your windshield, so slick surfaces will work. For a Sky Light replacement on an RV Rubber Roof I would definitely use Dicor Self Leveling Sealant.

Unplanned · 04-12-2017, 04:05 PM

Quote:

Originally Posted by JUS1MO

I have used 100% Silicone for a lot of different uses over the years. It works very well for some things and not quite as well for others. It will glue a rear view mirror back in place on your windshield, so slick surfaces will work. For a Sky Light replacement on an RV Rubber Roof I would definitely use Dicor Self Leveling Sealant.

No kidding about silicone sticking to slippery or smooth surfaces! One of my brother's farm tractors the doors are one piece glass. For hinges the factory used silicone to join the glass to the window behind it. To replace the door glass, both panes are laid on a flat surface around 3/4 inches apart and a large bead of silicone is applied to both glass panes, allowed to cure for 24 hours. Voila! A new door (glass) and the silicone acts as the hinge!!