Rope, glass stick & soapy water. I would not use silicone spray to install glass or silicone sealer to seal it after it is in. If you have any painting to do the silicone will make you say bad words if you try to paint over it. Silicone & paint go together about as well as gas & water in your fuel system. I just thought I would warn anyone who didn't know that & save lost time & money.