Leak Stop Spray Seal

https://www.dosoonsprays.com/products/leak-stop-spray-seal/

Leak Stop Spray Seal
A rubberized, flexible coating called Leak Stop Spray Seal keeps out moisture, air, and water. The self-leveling solution ensures a watertight seal by easily covering minor gaps and cracks after application. Anti leak spray is temperature/UV resistant, paintable, and yields long-lasting repairs once it has cured. Stop leak spray possesses specific waterproofing and leak-repairing properties and works well with a variety of base materials, including plastic, wood, and metal.