While this may not apply to windows, I used VHB tape to bond my one solar panel to a corrugated plastic sheet used to keep the solar panel cool on my hard dodger. After a year and a half I had to replace the VHB tape because it got gummy from the heat and allowed the solar panel to slide aft by about an inch. I changed the design since so I didn't have to rely on the VHB tape. The funny part is that the VHB tape was not under any significant load. I would really have my doubts about the longevity of VHB tape on windows without some other sealant or adhesive.
Sent from my iPhone, Bob Boyer > On Nov 10, 2015, at 11:18 AM, Marek Dziedzic via CnC-List > <cnc-list@cnc-list.com> wrote: > > One thing I noticed in these specs is that the VHB tapes have generally > better strength of bond when a dynamic load is applied and “will tend to show > creep behaviour with stress load acting over a long period of time (static > pressure). As a general rule, for static loads, approximately four square > inches of tape should be used for each pound of weight to be supported in > order to prevent excessive creep.” > > I am not sure, but it seems to me that for bonding windows to the cabin top, > this might be an issue if the windows are curved. Curved windows would try to > detach themselves from the fibreglass to which they are attached. So unless > you have some other way of keeping them curved, the tape might not be the > best option. > > just a thought. > > Marek > > From: Josh Muckley via CnC-List > Sent: Tuesday, November 10, 2015 10:48 AM > To: C&C List > Cc: Josh Muckley > Subject: Re: Stus-List Fwd: Replacing Windows > > The attached PDF had pretty good guidance. I would choose the thickest tape > which can still fit under the windows. Maybe even double layers. I have a > friend who used the 4941 series. After looking at the PDF it looks like the > 5952 series has better adhesive qualities and possibly higher adhesion for > the fiberglass and polycarbonate that we're using. The 5958FR has the > highest PSI to thickness ratio. I suggest thicker to allow the tape to press > into any irregularities. Thicker also allows for more differential expansion > of the glass and frame. > > As much as I like the VHB tape I still can't help but think to the auto > industry. They use a urethane made by Sika for windshields. It has to be > primed and heated. It cures in about an hour. I wonder if a combination of > VHB tape and sika-flex might be smart. VHB to get a nice interior finish and > sika for a permanent weatherproof bond and glazing. > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Solomons, MD > >> On Nov 10, 2015 9:54 AM, "Gary Russell via CnC-List" <cnc-list@cnc-list.com> >> wrote: >> Rob, >> Yikes! Thanks for the info. How to choose? >> Gary >> >> ~~~~~~~_/)~~~~~~ >> >> >>> On Tue, Nov 10, 2015 at 9:33 AM, robert via CnC-List >>> <cnc-list@cnc-list.com> wrote: >>> Dave: >>> >>> I am no VHB expert.....have never used the stuff. I understand there are >>> many different versions, at least that what I get from the website below. >>> >>> http://multimedia.3m.com/mws/media/67100O/3mtm-vhb-tapes.pdf >>> >>> Point being, make sure you get the right tape for the job you intend to use >>> it. >>> >>> Rob Abbott >>> AZURA >>> C&C 32 - 84 >>> Halifax, N.S. >>> >>>> On 2015-11-09 8:40 PM, Dave Godwin via CnC-List wrote: >>>> More response to this thread; I’ve been working on the fixed ports on my >>>> boat over the last few days and and paying close attention. After >>>> absorbing a good bit of the info in the thread and the links provided, I’m >>>> planning on moving away from using Plexus ("if it was good enough for my >>>> grandfather it’s good enough for me!”) and using the 3M tape. Seems the >>>> more modern ticket to me. >>>> >>>> I’m anticipating the operation to be a good bit easy than using Plexus, >>>> certainly if it is just one person doing the job. >>>> >>>> Cheers, >>>> Dave Godwin >>>> 1982 C&C 37 - Ronin >>>> Reedville - Chesapeake Bay >>>> Ronin’s Overdue Refit >>>> >>>> >>>>> On Nov 9, 2015, at 11:56 AM, Dennis C. via CnC-List >>>>> <cnc-list@cnc-list.com> wrote: >>>>> >>>>> Was afraid of that. The only ports close to the new C&C ports I've done >>>>> were on a Beneteau. Don't remember how hard the adhesive was. >>>>> >>>>> Dennis C. >>>>> >>>>>> On Mon, Nov 9, 2015 at 10:45 AM, Gary Russell via CnC-List >>>>>> <cnc-list@cnc-list.com> wrote: >>>>>> Hi Dennis, >>>>>> I'm quite sure those blades would work well for soft calk like >>>>>> silicones or urethanes, but Plexus is hard as a rock and I don't think >>>>>> they would work. In addition, the big problem is getting at the bottom >>>>>> window joint that is very close to the turn on the deck. >>>>>> >>>>>> Gary >>>>>> S/V High Maintenance (formerly Expresso) >>>>>> 1990 C&C 37 Plus >>>>>> East Greenwich, RI, USA >>>>>> >>>>>> >>>>>> ~~~~~~~_/)~~~~~~ >>>>>> >>>>>> >>>>>>> On Mon, Nov 9, 2015 at 11:25 AM, Dennis C. via CnC-List >>>>>>> <cnc-list@cnc-list.com> wrote: >>>>>>> Not quite the same thing but lately I've been removing ports that were >>>>>>> held in with sealant by using a vibrating saw with a caulk cutting >>>>>>> blade. Like these: >>>>>>> >>>>>>> http://www.amazon.com/Bosch-OSC214C-4-Inch-Caulk-Knife/dp/B004UBF43S >>>>>>> >>>>>>> http://multifitblades.com/straight-sealant-cutter.html >>>>>>> >>>>>>> Not sure how they would work on Plexus or Sika adhesives. >>>>>>> >>>>>>> Dennis C. >>>>>>> Touche' 35-1 #83 >>>>>>> Mandeville, LA >>>>>>> >>>>>>>> On Mon, Nov 9, 2015 at 9:30 AM, mike amirault via CnC-List >>>>>>>> <cnc-list@cnc-list.com> wrote: >>>>>>>> "Wow! You guys are lucky! My Windows came out in pieces with >>>>>>>> significant gel coat damage." >>>>>>>> Well, Gary, you are "High Maintenance" ;) >>>>>>>> Mike Amirault >>>>>>>> Lovely Cruise C&C33MKii >>>>>>>> SMSC >>>>>>>> >>>>>>>> _______________________________________________ >>>>>>>> >>>>>>>> Email address: >>>>>>>> CnC-List@cnc-list.com >>>>>>>> To change your list preferences, including unsubscribing -- go to the >>>>>>>> bottom of page at: >>>>>>>> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >>>>>>>> >>>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> _______________________________________________ >>>>>>> >>>>>>> Email address: >>>>>>> CnC-List@cnc-list.com >>>>>>> To change your list preferences, including unsubscribing -- go to the >>>>>>> bottom of page at: >>>>>>> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >>>>>>> >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> >>>>>> Email address: >>>>>> CnC-List@cnc-list.com >>>>>> To change your list preferences, including unsubscribing -- go to the >>>>>> bottom of page at: >>>>>> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >>>>>> >>>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> >>>>> Email address: >>>>> CnC-List@cnc-list.com >>>>> To change your list preferences, including unsubscribing -- go to the >>>>> bottom of page at: >>>>> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >>>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> >>>> Email address: >>>> CnC-List@cnc-list.com >>>> To change your list preferences, including unsubscribing -- go to the >>>> bottom of page at: >>>> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >>>> >>> >>> >>> _______________________________________________ >>> >>> Email address: >>> CnC-List@cnc-list.com >>> To change your list preferences, including unsubscribing -- go to the >>> bottom of page at: >>> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >>> >>> >> >> >> >> _______________________________________________ >> >> Email address: >> CnC-List@cnc-list.com >> To change your list preferences, including unsubscribing -- go to the bottom >> of page at: >> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >> >> > > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the bottom > of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the bottom > of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >
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