Liquid Rubber Waterproof Sealant - Multi-Surface Leak Repair Indoor and Outdoor Coating, Water-Based, Easy to Apply, Original Black, 1 Gallon - SALE OFF. It can be used in many applications where you need to create a watertight seal.
I used this rubberized water proofer on the edges of the bare roof wood panels prior to re-shingling my roof. It was an extra precaution against water infiltration during a hard rain. I'm very satisfied with this product which can be used for many other things to make them water proof.