Henry 101 Asphalt foundation sealant. It's basically petroleum solvent based driveway coat, like a professional company would use to sealcoat a driveway, it's what they make roads out of. Can use full strength or dilute with kerosene or diesel fuel, test mix to get correct constancy and drying speed for your application. Apply with brush or roller, or possibly a spreader if used in large qty. VERY HARD TO CLEAN UP, VERY STICKY. https://www.homedepot.com/p/Henry-4-75-Gal-101-Non-fibered-Foundation-Coating-HE101571/100003547

Don't use the water based crap in the video.