We have a long skinny window in our Master Stateroom that started leaking and we caulked and siliconed around it and it still comtined leaking. A friend suggested Captn Trolley's Creeping Crack Cure( I think thats the correct name). You squeeze a bit in and it creeps to wherevr the leak is and
seals it, supposed to do that a couple of times I think. We, or I should say my hubby used it all along the bottom slide area and especially in the corner of the window and it stopped the leak! It even dried up the inside are on our
teak where you could see the wet spot. Now you have to close to the wall to tell that there was ever a porblem! We are testing it in the screw holes of 2 opening port holes in our dinette as well. Haven't removed the outside plastic covering to prevent rain from getting in yet, but will this week to insert from the outside as well. We are
sold on this stuff. As far as the
fabric mold, I have no idea, coming from the backside may be a harder problem to fix. Good luck