I think the perscription for this disease is an hour of Craigslist a day takes the pain away.
It was spar varnish and I put on 4 coats, it has been on about a month since I coated it. Also, before I put down the S-18 I sanded the whole thing with 220.........Now time for confession!.... The night before I put in the vinyl I noticed a very small deflection between 2 pieces of deck and it kept bugging me so I sanded it down flush and then:facepalm:recoated that small area with spar!...... So when the S-18 hit it, it instantly reacted, so I knew I kind of blew it on that but then it made me start to wonder about the rest......it seams to be ok, just one of those sick to your stomach moments when you know that you really knew better. So I think you are very correct a complete cure before S-18 glue. Thanks for the help.Did you use spar VARNISH or spar urethane?
How many coats in total & how long since the last coat?
Rough & scuff slightly before the glue went down?
You mentioned that the glue seemed to react w/ the varnish, react how? Softening the varnish?
Spar varnish can take a fairly long time to fully cure, even longer w/ multiple coats. I suspect that although dry to the touch, the previous coat(s) wasn't cured when another was put on. It's probably the solvents in the spar & glue reacting to 1 another, specifically the glue's solvents & the spar's not yet fully cured surface.
S-18 has the following solvents:Heptane, Toluene, Acetone, Ethyl Acetate
I suspect those ^^^ attacked your spar.
i think Jas is pretty correct there. it should stick well enough considering that the outer edges will have side panel boards holding it down
Thanks again for the bump in the direction of vinyl, I really like it and am very glad that's the direction I went.Hey man,
Looking sharp!!! Nice work there! Just getting caught up...
I found it took an extra day or two for it to really adhere. Patience I guess is the word to use when gluing to to Spar... In the end after 2 seasons now... no issues with pealing or lifting at all!
Keep up the great work!!
J.
Nice lookin mulie... Didn't know they had anyplace to hunt in SoCal! ??