Better have a torch
I used it for seven or eight years on small and large cracks on an older drive. It always worked well, but I often applied it using a torch AND sometimes a household steam iron (without steam, of course). It never got tacky in the sun for me...Upstate New York. A very useful, and easy to use product...that sealed the blacktop drive cracks very well, way better than anything else I'd ever used.
I used it to fill a crack between asphalt and concrete. It is working well. Have not used it to fix cracks in concrete.
Typically you would apply an asphalt seal coat over the top of the whole driveway after sealing the cracks.
Don't waste your time. You will not be able to keep it "liquid" enough for any length of time. Use "1 Gal. 2X Premium Blacktop Crack Filler" instead. I used both on extensive cracks. The Pli-Stix has not lasted longer in the Arizona sun, and the Pli-Stix took hours longer (per serious crack) to apply.
I bought a torch with a hose on it from Harbor Freight. The hose makes it easy to direct the torch so you can apply as much heat as needed on the asphalt and as much heat as you need on the phil-stix.
Yes, I have done that.