I have silka flex 1a gray,silka 251 in whilte,acrylic r,parabond clear,GE silicone 2 in black. I am trying to find that darn leak. Today I parabond rear tail lights chrome meets alum housing. Then where LED lights are located I got pissed today and GE silicone them. Wow is it easy to work with compared with others, butter smooth and turned out really nice you can not even tell looks like plastic. Still not sure how leds got water in them on lower right hand side. If silicone is ok for aluminum that would be great!