Hi Mark, I installed new ports via VHB tape and Dow 795 using Krylon Fusion to make a bonding mask. The link to my write up is below. As already mentioned, the mask provides a nice finished edge hiding the underlying tape and sealant. I don’t recall the source, but I have read that the Krylon Fusion acts like a bonding primer for the Dow 795 promoting adhesion. (Dow actually sells a clear RTV primer, see Dow PR-1200 ) There are reports from folks on sailing sites who have tested the bonding with and without a Fusion mask, and they report no loss of adhesion. That stated, if you go with a Fusion mask, then one thin coat is all that is need and likely better than a thicker coat. But to be honest, I think the greatest detriment to adhesion are your fingers. Don’t touch the bonding surface, be it Fusion paint or not. And just before inserting the port, give the surface mounted area one last wipe down with isopropyl and let dry.
http://svjohannarose.blogspot.com/search/label/NewPorts - Paul E. 1981 C&C 38 Landfall S/V Johanna Rose Fort Walton, FL http://svjohannarose.blogspot.com/ > > On Mon, Apr 24, 2017 at 11:39 PM, Dr. Mark Bodnar via CnC-List < > cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> wrote: > >> Thanks for the info - I was hoping I could get away with a rough repair. >> >> As for the paint - I've read (elsewhere I guess) that it's a good idea to >> rough fit the window, trace from the inside where the opening is, then >> strip away the paper cover for the section of window that will be against >> the cabin top and spray paint it black with Krylon Fusion plastic paint. >> The idea is to make sure the VBH tape and the 795 are not visible through >> the plexiglass. There was some question about the adhesive qualities of the >> Fusion paint - so I might test that on old plexiglass. >> >> While my plexiglass is dark grey I still thought I might be able to see >> some of the - I'll have to test that too. >> >> Mark >> >> >> _______________________________________________ >> >> This list is supported by the generous donations of our members. If you >> wish to make a contribution to offset our costs, please go to: >> https://www.paypal.me/stumurray <https://www.paypal.me/stumurray> >> >> All Contributions are greatly appreciated!
_______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
