So did you cut the edges first to prepare them for the liquid nails? On Wed, Aug 23, 2017 at 11:40 AM, ken winston caine < ken.winston.ca...@gmail.com> wrote:
> REVISION: LIQUID NAILS SUCCESS > > NEW TEST: Liquid Nails vs. Epoxy > > -1- Liquid Nails, spread thinly with putty knife, on smooth flat > beveled-cut surface, with some tiny holes scratched into both facing > surfaces with a wallpaper scouring tool, then clamped and cured for 24 > hours, works BEAUTIFULLY! Incredible strength. And Liquid Nails claims its > repairs will outlast the life of the original material. Am going to trust > that. > > -2- Epoxy, surfaces prepared the same way as above, simply did not dig in > to anything but the very very topmost layers of polyiso fuzz. And the > adhered parts easily snapped apart after 24 hours cure time. When snapped > apart, I observed the epoxy "bond" covered with maybe 1/100 inch of polyiso > fuzz. Is possible that if I punched a lot of tiny 1/2" deep holes in each > face and smeared on the epoxy much thicker, that I would get a strong bond. > But, given the positive results with the Liquid Nails, once spread with a > putty knife, and its substantially lower cost, I am not going to do any > further testing with epoxy resin. Also is possible that epoxy would work > better (or perfectly) with NEW polyiso boards. Mine are salvaged boards, > possibly 20 or more years old. (They do age, outgas, lose R-Factor over > time. And maybe mine are fuzzier along my cuts than new boards would be. I > don't know.) > > So ... I am going with the much less expensive Liquid Nails. > > That means I must create some 30-degree-angle braces (out of 2x4s?) that I > can clamp onto roof-cone sections as I glue them to hold them for the 24 > hours cure time. And 30-degree-angle braces for the wall sections. > > > As an additional measure, am going to use an awl to punch a dozen or more > 1/4" deep random holes along each face to allow for much greater material > penetration in those spots to make for a stronger, more durable bond once > cured. > > Also, am going to test using rubbing alcohol or acetone on a cloth to > lightly rub the surfaces to be joined to see if that will help clean away > dusty fuzz. (Or whether it melts the polyiso.) > > On Wednesday, August 16, 2017 at 2:54:31 PM UTC-6, ken winston caine wrote: >> >> Fail was my fault. >> >> 1. I didn't clamp the boards after gluing. >> 2. I thought a 70 lb. pallet would be adequate to keep a wind gust from >> causing a problem during overnight cure. >> 3. I had assumed the Liquid Nails compound would be less viscous and more >> grabby and that I could spread/smear it over the entire surface of each >> face to join. Not possible. Instructions say to apply in a zig-zag design, >> so that is what I tried. <snip> >> >> >> -- > You received this message because you are subscribed to the Google Groups > "hexayurt" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to hexayurt+unsubscr...@googlegroups.com. > To post to this group, send email to hexayurt@googlegroups.com. > Visit this group at https://groups.google.com/group/hexayurt. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "hexayurt" group. To unsubscribe from this group and stop receiving emails from it, send an email to hexayurt+unsubscr...@googlegroups.com. To post to this group, send email to hexayurt@googlegroups.com. Visit this group at https://groups.google.com/group/hexayurt. For more options, visit https://groups.google.com/d/optout.
