confused

[deranged chipmunk]

keep in mind, like Carlos and Louis mentioned, that silicone will adhere to almost anything, except, previously cured siicone. that means if you have a leak, you need to start over. you can't just add more silicone on top of silicone.

[Louis Charles Bruckner]

Me personally I wouldn't use glass. I would use 1/4 plexi glass or plastic. it might scratch up easier.
But it is much safer to work with and you can round the exposed edges to make it safer than cut regular glass that is sharp as a razor.

Lowes will cut it for you for free. Yes it is a bit more expensive but it is much safer to work with.

[deranged chipmunk]

i definitely agree. plexi or lexan is so much safer to work with. not to mention that unlike glass, either can be bent or molded rather easily to create a more naturalistic design, rather than the boxy look you get from glass.

[Louis Charles Bruckner]

To clarify plexi can be heated and bent fairly easily and safely.

also when you get really good with it you can even do chemical welding of it to make nearly invisible seams.

[UncleChester]

But it is much safer to work with and you can round the exposed edges to make it safer than cut regular glass that is sharp as a razor.

That's a good point and if he goes with glass he should ask whoever cuts it to smooth the edges. If they won't do it, it's easy enough to do with sandpaper and a thick pair of gloves. The gloves are important.

[Louis Charles Bruckner]

I didn't know that.
What grit should you use and do you recommend dry or wet sanding?
I would imagine that you start out with a fairly rough grit for glass say 500 and smooth it out with 1000?

Sorry that is the engineer in me coming out. LOL

That's a good point and if he goes with glass he should ask whoever cuts it to smooth the edges. If they won't do it, it's easy enough to do with sandpaper and a thick pair of gloves. The gloves are important.

[UncleChester]

I use whatever grit is within arms length, usually 100 or 120, or maybe 180 (if the cut was already pretty clean to begin with). You're just taking off the sharp edge there's no need to polish it. The end result won't look like a piece out of a pro glass shop with a nice rounded edge, just something that's no longer sharp.

Wet is preferable to keep the dust under control.

Wrapping the sandpaper around a wooden block is a good idea. Also, wear gloves.

I've also used one of those 'diamond' knife sharpeners and it worked pretty well.