search reefcentral....I talked with a guy who did his research in college and now works in the field with silicone. He agrees it will bond to both surfaces however the mechanical bond with acylic is less then with glass, but for most purposes aquarium related it works fine. I'm sure if it will hold 180 and 150 gallon centerbraces, your baffles should have no problem. If you take a bit of 200 grit os so sand paper and go over your edges it will stick even better. Just don't try flame polishing your edges of your baffels then siliconing them on. It may only hold 60or so pounds then.