• Keep your triangles small, less than a meter ( 3 feet) because polycarbonate isn’t very thermally stable if you have large triangles the polycarbonate will buckle when its warm.
• Use UV stable glazing tape 3mm thick is ideal.
• Use UV stable good quality low modulus silicone, cheap silicones have bulking agents and solvents that will not stick and can actually damage the polycarbonate.
• Use a shoe on the end of the silicone nozzle; with a bit of practice you can seal the frames quickly and cleanly.
• Buy a silicone-smoothing tool and use soapy water to tool the silicone when you’re done.
• This technique only works on the hub-less domes available on geo-dome and the plans available in the shop

If you need any further help or have a question about covering with polycarbonate, post it below and I''ll try and help out.