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#11
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#12
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"Brian Nystrom" wrote in message
news:LT8xe.14504$Q27.5022@trndny02... wrote: Joints which were glued with Gorilla Glue and then screwed together (on the boats) easily came apart by prying, the glue failed. I was horrified when I saw how weak this stuff is. If the joints were that weak, the screws must not have clamped them tight enough and the glue expanded. The same is probably true of your chair repairs. With tight joints, the wood will fail before the glue does. You CANNOT use PU glue to fill gaps; it says that right on the bottle. Epoxy is definitely more forgiving and does fill gaps well, but you can't blame the PU glue if you use it improperly or in the wrong application. But the problem with boats is that you cannot make tight joints most of the time. It's almost impossible to apply 4kg/cm2 on a joint which is several meters long. Meindert |
#13
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#14
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"Norm II" ) writes: What exactly is PL Premium...Something I can find at Home Depot?? Thanks. It's a different formulation of polyurethane (PU) adhesive, a mastic in a clauking tube often referred to as "liquid nails", used in house construction. PL Premium is supposed to be their stongest althoug I'm not sure it's any better than the slightly cheaper PL400. You can find them at any building material store. I don't shop at Home Depot but they are sure to stock it. Here in Ottawa I get it for a lower price at Canadian Tire. David Beede has done some trials with different polyurethane mastics and put the results on his website at www.simplicityboats.com. I think it's a good replacement for urea formaldehyde (plastic resin) marine adhesive (Weldwood was a popular brand). I used plastic resin on my first small plywood boat (Dogskiff on my website) and PL Premuim on the other three. PL Premuim is a lot easier to work with. You lay a 1/4" bead on one surface. I spread that with a putty knife to get it right to the edge and to get complete and even coverage in the joint. You can reposition the parts up to 45 minutes. Then clamp (or use screws) and allow 24 hr to cure. You can even pump it into voids in cheap plywood to fill them. If the glue gets on your hands it dries flexible and stays for days. If you don't want dirty-looking hands afterwards, wear gloves. I don't think you can get a more suitable adhesive at a better price for a small screw-and-glue boat like the OSS. -- ------------------------------------------------------------------------------ William R Watt National Capital FreeNet Ottawa's free community network homepage: www.ncf.ca/~ag384/top.htm warning: non-FreeNet email must have "notspam" in subject or it's returned |
#15
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On Fri, 01 Jul 2005 04:24:44 GMT, Lew Hodgett
wrote: Subject Over priced and under peckered. Strictly garbage IMHO. Lew Yes, but what do you really feel? Don't hold back now. I agree. Another miracle product bites the dust. |
#16
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"Meindert Sprang" ) writes: But the problem with boats is that you cannot make tight joints most of the time. It's almost impossible to apply 4kg/cm2 on a joint which is several meters long. So true. If it weren't for the precision fit on the cheap boats I throw together, PL Premium would have failed. Maybe my aim is a little better than Mini-cup builders. Not by much I'd wager. PL Premium expands, fills gaps, and holds just fine thanks. I've never had to mix it with any kind of filler as I do with epoxy and did with "plastic resin". -- ------------------------------------------------------------------------------ William R Watt National Capital FreeNet Ottawa's free community network homepage: www.ncf.ca/~ag384/top.htm warning: non-FreeNet email must have "notspam" in subject or it's returned |
#17
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I admit, my building skills are poor. However, I'd still not reccomend
Gorilla Glue to anybody building boats. I used enough screws that it should have held better. I also think that if you are going to spend all that time building a boat, dont you want it to last? |
#18
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Meindert Sprang wrote:
"Brian Nystrom" wrote in message news:LT8xe.14504$Q27.5022@trndny02... wrote: Joints which were glued with Gorilla Glue and then screwed together (on the boats) easily came apart by prying, the glue failed. I was horrified when I saw how weak this stuff is. If the joints were that weak, the screws must not have clamped them tight enough and the glue expanded. The same is probably true of your chair repairs. With tight joints, the wood will fail before the glue does. You CANNOT use PU glue to fill gaps; it says that right on the bottle. Epoxy is definitely more forgiving and does fill gaps well, but you can't blame the PU glue if you use it improperly or in the wrong application. But the problem with boats is that you cannot make tight joints most of the time. It's almost impossible to apply 4kg/cm2 on a joint which is several meters long. Fine, then use an adhesive more appropriate to the task. |
#19
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