I have had this speaker for some years. It is out of an old organ extension cab a friend gave me a long time ago. It is a Jensen P12PS, with a whizzer cone. I have a Silvertone 1482 that I refurbished and modded, but it needed a better speaker than the one that it came with. I pulled the Jensen out and installed it in the 1482, and sounded good except for a bad fuzzy buzz. I pulled it out and examination revealed it was deteriorating badly. I will eventually get it reconed but I have budgeted my money for another project for now so having nothing to lose, I attempted a repair.
I have marked with a sharpie on the gasket where the damage is. It is torn all the way around, and as you can see a couple of spots are really bad, a gaping hole and a severe rip.
Ok, Here goes. I painted on a layer of contact cement, then layed the tissue paper over it, then painted another layer of contact cement. I doubled up on the two bad spots. I also painted a layer of cc over the whole surround, to protect it from future damage. I let this set up for a day, peeled off the excess, and applied another layer using the same technique.