thanks for the reply JD!
ok so RTV is good. but I read that its soo good that is virtually impossible to remove? I have some silicone sealant (non-RTV) at home and its not the easiest thing to scrape off..but it seems to be do-able. is RTV really that much more difficult to remove?
also..any idea what the usual operating temps are for regular clear silicone sealant? (I have the Devcon one)