OSIQUAD Gray 513 Window, Door and Siding Sealant 10-Fluid Ounce Cartridge (1636986)

OSI/Quad is some of the best sealant you can buy. I have returned to jobs to change things for people and been amazed how tough this stuff is years later. Wear gloves! You don’t want it in you. The safest way I’ve seen to get it off your hand is get a bucket of chicken wings. Better off just wearing gloves!

Works great