I've got a shower that a few months ago must have had a very slow leak somewhere. There was a slightly damp patch on the floor of a cupboard nearby, and some dark looking cracks along the line of the sealant where it borders the tiles. We've left it to dry out for months and bought new sealant and a gun (which I've got in the room with me) but haven't used them yet (we've been using another shower).
I'm now self-isolating with a cough in the room this shower's attached to and I really really want a shower. Can I do anything as a quick fix, without removing the old sealant (I haven't got a stanley knife or the motivation or energy to do that right now)? I've got some quick grout too. Is there any point in trying a temporary fix directly on the obvious cracks round the sealant?