Remember that VHB tape is typically used on outdoor signs--it is not meant for any structural purpose.
Flexibility is probably more important than strength for the adhesive.. Dow 795 is silicone. Bob On Oct 21, 2015, at 6:29 PM, Frederick G Street via CnC-List 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 > Bob Boyer S/V Rainy Days (1983 C&C Landfall 38 - Hull #230) email: dainyr...@icloud.com blog: dainyrays.blogspot.com "There is nothing--absolutely nothing--half so much worth doing as simply messing about in boats." --Kenneth Grahame
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