You raise good points. My guess is that the 3M rep did not consider the expansion/contraction issue or the issue of wanting space to squeeze in sealant. Also, 4991 is “more conformable” if you have an uneven surface (although mine is flat).
From: Gary Russell via CnC-List Sent: Thursday, December 14, 2017 3:49 PM To: C&C List Cc: Gary Russell Subject: Re: Stus-List Window replacement The problem with VHB 5952 is that it's only available in 0.045" thickness which is too thin for this application IMO. I prefer VHB 4991 at 0.090". VHB 5952 is not thick enough to deal with the surface variations of the coach roof, the different rates of expansion of the gel coat vs. the Plexiglas and it doesn't allow enough space for the sealant to be forced in. So far, I've had no problems with the 4991 but I recognize that 3M knows a lot more about the adhesion characteristics of the two variants than I do. Gary ~~~~~~~_/)~~~~~~ On Thu, Dec 14, 2017 at 1:41 PM, Matthew L. Wolford via CnC-List <cnc-list@cnc-list.com> wrote: Incidentally, I noted in a previous e-mail that a 3M rep I talked to (by calling in) recommended 5952 over 4941. I just inquired again – this time by e-mail. 3M responded that that it recommends the 59XX series for this application. For what it’s worth. From: bushmark4--- via CnC-List Sent: Thursday, December 14, 2017 12:16 PM To: cnc-list@cnc-list.com Cc: bushma...@aol.com Subject: Re: Stus-List Window replacement OK I really appreciate all of these comments about window replacement, (mostly because I have one coming up this spring myself); I have been trying to save them all on one document, but it has become a hodge-podge of separate comments and bits of advice; can anyone put all of this together in a some order...or as a flow chart? maybe it should be posted on the photo album? Many thanks: all of these comments are definitely appreciated! Richard s/v Bushmark4: 1985 C&C 37 CB;Ohio River, Mile 696; On the hard for Winter.... Richard N. Bush 2950 Breckenridge Lane, Suite Nine Louisville, Kentucky 40220-1462 502-584-7255 -----Original Message----- From: Gary Russell via CnC-List <cnc-list@cnc-list.com> To: C&C List <cnc-list@cnc-list.com> Cc: Gary Russell <captnga...@gmail.com> Sent: Thu, Dec 14, 2017 11:53 am Subject: Re: Stus-List Window replacement Good point! I also put a 45 degree bevel on the back side of the Plexiglas to about half the thickness. I also put a very small bevel (1/16") on the front side just to protect any bare feet that might hit it. Gary ~~~~~~~_/)~~~~~~ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray ------------------------------------------------------------------------------ _______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray _______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray -------------------------------------------------------------------------------- _______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
