I have a bit of a situation...
I have a 3x5 Fiberglass reinforced acrylic construction designed for a 3 wall alcove. However, in my infinite wisdom, I overlooked this crucial detail and proceeded to mortar the thing in place prior to building the 2' wall in front in which I installed my vanity (and of course drywalled/finished). At the time of construction, I was in a bind and thought I would engineer flashing to divert the possibility of water getting over the curb on the front portion that is against the wall. The other 3' or so of the front is just where you would enter/exit the shower. A door or curtain will protect this.
I went ahead and started to DenShield the back wall to get an idea of how everything works on that bottom profile. The lip from the factory is substantial. It's a good 3/4" tall and it's also a good 3/16" thick, meaning it protrudes the bottom edge of my tile board. Per manufacture install instructions, I am to cover 1/2" of that lip, and leave 1/4" gap between board and the bevel of the pan for obvious reasons such as water wickiing into the tile board over time.
Right now I am at a loss of a permanent solution for the front lip creation. I originally was thinking some kind of plastic or pvc molding epoxied to the pan with something like those big box store 2 part mixes in a squeeze tube. I fear this would fail over years of use? Either the plastic would break or the bond would break if that portion of the shower was ever bumped into from all the weight. A tiler told me to just silicon the gap between tile board and pan, leaving my entire protection on a bead of silicon that is supposed to adhere to a painted acrylic pan and a fiberglass/gypsum type tile board. This seems sketchy, too.
Anyone have a better idea? A type of adhesive that would work for molding/welding/melting the lip to the pan for this 2' section?