I did my windows last year using the Select Plastic method - No clamps or bracing required. Tony pre-drills 6 very small holes through the Plexus (or choice of window). Dry fit the windows and drill pilot holes into the fiberglass through Tony's holes. Mask everything. Affix nylon washers or other spacers to the window with dabs of Dow 795. Apply plenty and I mean PLENTY of Dow 795 to the window. (If you don't make a mess, you have not used enough!) Put windows in place and affix with small screws in pre-drilled holes. Tighten enough to ensure 795 oozes out every where. After several days (I think it was 10 from memory) remove screws and fill holes with dab of 795. Admitedly only one season so far, but not a single leak.
My biggest mistake was not to get good masking in the sharper inside corners. However, a few minutes of careful work with an Xacto knife blade, and the 975 came away clean, As I said in an earlier post, 795 takes quite a while to set up and Tony was adamant that I should not move the boat for quite a while - I think it was 10-15 days - This is therefore a fall or early spring project if you don't want to delay splash! Jonathan _____ From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Frederick G Street Sent: Wednesday, March 06, 2013 5:02 PM To: cnc-list@cnc-list.com Subject: Re: Stus-List Butyl Tape or 3M Tape on Windows Could you please resend the model of 3M tape you're using? I'd love to try that method with Plexus on my next window redo; it could save all the holding and bracing while the adhesive sets up. Thanks! Fred Street -- Minneapolis S/V Oceanis (1979 C&C Landfall 38) -- on the hard in Bayfield, WI :^( On Mar 6, 2013, at 1:48 PM, Harry Hallgring <hhallgr...@icloud.com> wrote: 1. prep/sand boat and plexi. 2. Sika prime both surfaces 3. apply tape to boat on inboard edge of opening 4. mask everything 5. lay bead of sealant on boat 6. set ports 7. finish sealant 8. remove tape when tacky I don't use clamps or braces, although it wouldn't hurt. The tape holds it in place (approx 1/16" bedding). Ports completed two seasons on MIRAGE without incident. I have done other frameless surface mounted ports on my J Boat the same way and it lasts. Sika is good stuff. Harry Hallgring hhallgr...@icloud.com
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