Stormsure Ltd makes a range of special waterproof adhesives and repair kits. The glue is unusual as it is flexible when cured, forms its own patch, is incredibly abrasion resistant and sticks to almost everything. It is ideal for mending leaks in airtight or waterproof fabrics such as rubber boots and tents; it also sticks wood and concrete together very effectively!
It is sold in consumer packaging in small tubes and is also available in special repair kits which are made up for specific purposes. Look on the website www.stormsure.com for more details.