I decided to go back to the PVC bottom again. Wish I would have decided this before I made the plywood Pond Shield base. Oh well, have to keep that for a garage tank build later.
I did come up with a solution for the silicone/pvc seal. In researching the Pond Shield, I found it sticks to PVC really well without primer and all that is needed is to just sand the PVC as you would the plywood. More on that later.
For the PVC I found a company called Industrial Plastic Supply loated at
2240 S Dupont Dr, Anaheim, CA 92806.
Prices are awesome and they have all kinds of plastic, acrylic, pvc ect for great prices. If looking to DIY check them out. Kevin was my contact there. Great customer service.
I picked up a 1" thick 8x4' sheet of PVC and with help was able to load it up. It weighs less than the same size 3/4" piece of glass, but it's still a heavy beast.
Next in the process was to router a 1/2" x 1/2" rabbet edge to place the glass in. What a mess this made. I filled up a 30 gallon garbage bag with all the shavings. The edge came out perfect though.
After getting the edge done, I sanded 1" of of the top inside edge with 60 grit.
After all the mess was picked up, I moved the PVC onto the stand. With the last bit of Pond Shield I had, I applied it to the edges where the glass will sit and on the sanded 1" inside edge. I'm hoping the SC1200 silicone will really stick now to the Pond Shield.
Time to let it cure and maybe install the glass later this week.
