Sealant or adhesive to fix light bleed after screen replacement?

I replaced the glass and digitizer on my G2 and while it works great and looks just fine, in the dark last night I can see clear light bleed from the very edges of the glass and case. I'm more worried about dust getting in than moisture or the light, but it would be great to fix regardless. Is there any kind of opaque sealant or adhesive such as a rubber one could heat and then rub along the edges and wipe off to help seal this area? Thanks!