I have inherited a conservatory with a 1 x 2 timber frame roof with polycarb sheets. Currently the poly is waterproofed by gaffer tape! Very pretty. I'm a great one for using what is to hand so for a temporary over winter measure I am thinking of using tub and tile sealant. Will it last until March and more importantly will it be effective in the short term. I am replacing next year with 3mm acrylic and completely restoring the whole structure.

Any thoughts?