Bruce, Yes, plastic welding is the way to go, don’t waist your time with sealant or adhesive repairs. I repaired the water tanks in my Landfall 38 by plastic welding. I never plastic welded before this and the tanks are still holding fine. Use a hot air welder, which Harbor Freight also sells. I would be reluctant to use cheaper hot iron welder as welding requires softening the base plastic and the plastic welding rod. I purchased LDPE plastic welding rods from Granger. My tank had a long cracked corner which I welded and then reinforced with some 316SS mesh (also from Grainger).
I have some details on my blog: http://svjohannarose.blogspot.com/search/label/WaterTankRepair <http://svjohannarose.blogspot.com/search/label/WaterTankRepair> - Paul E. 1981 C&C 38 Landfall S/V Johanna Rose Fort Walton Beach, FL http://svjohannarose.blogspot.com/ > On Jul 31, 2017, at 11:18 AM, cnc-list-requ...@cnc-list.com wrote: > > Message: 1 > Date: Mon, 31 Jul 2017 13:16:20 +0000 (UTC) > From: Bruce Whitmore <bwhitm...@sbcglobal.net > <mailto:bwhitm...@sbcglobal.net>> > To: C&C List <cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> > Subject: Stus-List Plastic Welding Water Tank > Message-ID: <726968754.3023553.1501506980...@mail.yahoo.com > <mailto:726968754.3023553.1501506980...@mail.yahoo.com>> > Content-Type: text/plain; charset="utf-8" > > Hello all, > We have a 1994 C&C 37/40+.? The starboard water tank is leaking through a > crack in an upper corner of the tank.? The P.O. tried to seal the crack with > a combination of silicone sealer reinforced with a piece of fiberglass > cloth.? Obviously, that repair didn't hold.? Thankfully, the tank was very > easy to remove! > > I understand that welding plastic is pretty easy, and I've looked a video or > two, most of which show a tool that blows hot air, though a cheap version at > Harbor Freight looks more like a soldering kit, though I'm not sure its the > correct tool for the type of plastic used in making the water tanks. > So, a couple quick questions: > 1).? What type of plastic are the tanks made of?2).? What is the correct tool > for welding them? > > Any hints or tips of course would be greatly appreciated!? ?Bruce Whitmore > > (847) 404-5092 (mobile)
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