A propane torch works, relievs many machining defects that act a stress risers and thus minimizes crack propagation, usually the cracks don't leak, just look cracked Dwight Veinot C&C 35 MKII, Alianna Head of St. Margaret's Bay, NS d.ve...@bellaliant.net
On Fri, Mar 4, 2016 at 12:55 PM, Alan Liles via CnC-List <cnc-list@cnc-list.com> wrote: > I was advised, by a professional, to use a propane torch to finish the > edges. It makes sense but I would have to practice a bit on scrap before I > tried it on the real windows. > > Al > S.V. Elendil > 37/40+ > > > On Mar 4, 2016, at 8:35 AM, Bill Bina - gmail via CnC-List > <cnc-list@cnc-list.com> wrote: > > Plexiglass is very prone to developing cracks from any minor imperfections > or irregularities in the edges. If you carefully polish and buff the edges > completely smooth, cracks don't have a way to start themselves. > > Bill Bina > > On 3/4/2016 11:15 AM, sthoma20--- via CnC-List wrote: > > Acrylic (Plexiglass) cracks easily, but is harder and more scratch resistant > than polycarbonate (Lexan). Stock car racers use polycarbonate for > windshields in their short track race cars. It is the more crack and impact > resistant of the two plastics, but more likely to cloud if you are too > aggressive washing it. It is a trade off like everything else, but I would > lean toward the Lexan in that application. Both of my boats have long > Plexiglass side windows, and both have one side that is cracked vertically > more or less in the middle. > > Steve Thomas > > ---- Fred Hazzard via CnC-List <cnc-list@cnc-list.com> wrote: > The 2 windows I replaced about 7 years ago with Sikka Flex and their primer > have developed a lot of cracks along the top edge. These cracks are > leaking. I cannot recall if I used polycarbonate or cast acrylic. Of the 2 > choices which would be the better for replacement? They are relatively > long windows that are held in only by the Sikka Flex. This time I plan > to use 3 M tape. > > Fred Hazzard > > > _______________________________________________ > > 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
