Btw, I have 3 tanks, 90 gal plus, all either built or re sealed with pure silicon form auto parts store........no failures. Just make sure u remove ALL old silicon u can get to, clean VERY WELL with pure alcohol, and dont allow silicon beads to from "skin" or ur screwed and will not get good bond bead to bead, and "tool" bead to make sure good contact with glass. (I use my finger).Mask area ur sealing to minimize mess but dont worry too much. Once silicon cures messes are easily cut and cleaned off wiith razor scraper.

I bought newflex 333 aquarium silicone $5. They do have black color though.

Thank you.

Will the SCS1200 bond polycarbonate to glass is it's an adhesive?

I've heard polycarbonate will leach stuff in saltwater, I use scs1200 for acrylic overflow boxes all the time, just scuff up the glued surface

Like stated, use acrylic, and it will hold it in position, but personally I wouldn't trust it to have the proper structural integrity as it would when bonding glass.

With my old 120g setup, I built a media tower out of polycarbonate for my sump without negative issues.

What leaches out of the polycarbonate?

Thank you!

Does anyone know who sells GE SCS 1200 locally in Vancouver?

Thanks in advance!