FWIW, the sikaflex does not have great adhesive power, but is UV resistant. So they use something real sticky (I think it was called '111') to do the adhesion then cover with sikaflex for UV protection.[/QUOTE]
I BEG TO DIFFER!!!!!
I use SikaFlex 221 by the case and find that it's bonding and sealing capacities are extremely strong. Which product did you use, how did you prep the surface and what atmospheric conditions did it cure in ?
In bonding applications, I have used it on a variety of substrates, including wood, and attempted removal or separation of the bonded pieces have resulted in the virtual destruction of the bonded surfaces (like ripping the top layer of the wood from the rest of the piece).
They do make a UV resistant sealant called 505-HV, which is a single component silane terminated polymer rather than a polyurethane, but it still shows impressive adhesive qualities.
Sorry to take this thread off-track, as I remember it was originally about batteries