LifeSeal is my "go to" sealant. Haven't used 4200 (polyurethane) or silicone in months.
Dennis C. On Wed, Oct 21, 2015 at 5:29 PM, Frederick G Street via CnC-List < cnc-list@cnc-list.com> wrote: > From this, it sure looks like Plexus is the best structural option; 5200 > *would* be next, but it’s not compatible with acrylic. I’m surprised > that LifeSeal shows such good characteristics. VHB tape, 4200 and Sika are > all in about the same range. Looking at a cut sheet for Dow 795 (which you > didn’t include here, but has been used with VHB tape), it’s not really > providing much in the way of strength, with a >21 days cure tension > adhesion strength of 45psi. > > I thought the Dow 795 had greater structural characteristics than the cut > sheet shows: http://www.dowcorning.com/DataFiles/090276fe801a7bbe.pdf > > — Fred > > Fred Street -- Minneapolis > S/V Oceanis (1979 C&C Landfall 38) -- on the hard in Bayfield, WI :^( > > On Oct 21, 2015, at 3:40 PM, Dennis C. via CnC-List <cnc-list@cnc-list.com> > wrote: > > I did a bit of quick research on adhesives. My quick look and the > terminology may lead to inaccuracies. I am not a materials engineer. For > instance, shear strength numbers were either listed as shear strength or > lap shear strength, then there is dynamic vs static whatever. Please take > the info with a LARGE grain of salt. > > I listed the references so you can look them up yourself. > > This may interest some. > > Material > > Static or Lap Shear strength, psi > > Tensile strength, psi > > Reference > > > > > > Plexus MA530 > > 1600-2200 > > 3000-3500 > > > http://www.rshughes.com/p/Plexus-MA530-Black-Methacrylate-Adhesive-50-Gal-Drum-Shear-Strength-1600-To-2200-Psi-Tensile-Strength-3000-To-3500-Psi/plexus_it206/ > > Sika > > n/a > > 160 > > https://www.google.com/search?q=sika+295uv+shear+strength&ie=utf-8&oe=utf-8 > > 3M 5200 > > 360 (fiberglass) > > 630-705 > > > http://multimedia.3m.com/mws/media/158782O/adhesive-sealant-5200-tech-data.pdf > > 3M 4200 > > 20-165 > > 180 > > > http://multimedia.3m.com/mws/media/891179O/3m-marine-fast-cure-general-purpose-adhesive-sealant-4200fc.pdf > > LifeSeal > > 240 > > 290 > > > http://www.boatlife.com/content/NEED%20LifeSealR%20POLYURETHANE-SILICONE%20SEALANT.pdf > > 3M VHB tape 59XX > > 1000 > > 90-100 > > https://multimedia.3m.com/mws/media/67100O/3mtm-vhb-tapes.pdf > > Dennis C. > > > > _______________________________________________ > > 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 > > >
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