Dear all. I have just inherited my mother in laws greenhouse. It is about 25 years old and I have to taken it down ready to transport home. My problem is that all of the glass was sealed with something which appears a cross between blue tack and putty. It is still softish so comes off easily enough. Unfortunately the aluminium frame is such that it won't take rubber strip and have trawled the net today for a solution. An idea I have seen is to use silicon sealant but surely this will be fairly permanent and would make it difficult to replace any breakages.
Any help will be gratefully accepted.