Do PVC terrariums need silicone?

[Raven01]

Hey guys,

I bought a used Animal Plastic T-12 cage today (got it for a steal on CL) but noticed that the previous owner has not siliconed the inside of it. Does anyone know if I would need to do that or is that an optional thing?

Also, if anyone can recommend reptile-safe silicone, it would be greatly appreciated.

Why would you silicone it? I don't use Animal Plastics myself but, most X-PVC enclosures are thermo-formed and chemically welded. With a decent chemical weld you shouldn't need to silicone even to make it water tight.