Asphalt driveway hairline crack repair

I'm starting to get hairline cracks on an asphalt driveway sealed 2 years ago. I'm going to reseal it but first want to deal with hairline cracks. Because the cracks are narrow I'm looking for something with a low viscosity but have not been able to find something that fits the bill. Are low viscosity (under 3,500 cPs) available to consumers? Or is it that I fill them with sealant, which doesn't seem correct.

I did find a product by Brewer but it seems to be available only to the industry.

 

If there true hairline cracks I would not worry about using a filler.

 

As Joe said, hairline cracks shouldn't need a filler. The sealer will seal minor cracks.

 

I sealed maybe 6 driveways so far, the crack filler in a gallon, doesn't really fill up to 1/4" deep or whatever it said. It settles and/or shrinks and the next day still needed another coat to bring flush with surrounding surface. they sell strips of stuff you put in the crack and use a blowtorch vs the professional way is a dedicated machine just for doing that (those dark lines you see on streets and parking lots). Even with the smaller hairline cracks everywhere thourouhgt the driveway that the sealer claims to fill, you will probably see soon enough and the sealer didn't really make it all a completely level surface. I use the highest grade sealer gel they sell in the stores and still this happens. I powerwash and degrease driveway first and then shop vac or blower it and do everything to t but still can see some cracks with two coats. Better than letting the driveway go to crud though without sealing and winter, salt etc crumbles it beyond repair.

Oh, also same thing goes for the trowel patch "up to 2" recess filled' or whatever it says, it shrinks and or settles and need 2-3X more than you thought.

 

I can't edit, I try and it shows my psot as missing half of it, so I'll just write another reply, just wanted to say also you will probably see your crack filler though the sealer despite thinking the sealer will hide the crack filler.

 

Sealer isn't intended to make the hairline cracks disappear but normally it will seal minor cracks. Not sure there is any way to make any crack totally disappear short of repaving.

 

well they do claim to "fill" up to 1/8", but I haven't had that happen. Can still see the cracks. Maybe the asphalt soaks in the sealer too well. Maybe a third coat (if it's not recommended to do so) would fill them if you run the squeegee in the direction of the crack without pulling the sealer out too much, which is basically impossible with spiderweb cracks. Even though they claim "fill" up to 1/8" I doubt any warranty would cover it despite it not filling and still being a crack (that can hold moisture and freeze and expand thus making the crack worse).



175 Asphalt Driveway Sealer - Henry Company

"Capable of filling surface cracks up to an 1/8" thick"

Latex-ite 4.75 Gal. Airport Grade Driveway Filler Sealer-73066 - The Home Depot

"Airport grade is a non-skid formula that will fill hairline (1/8 in. or less) cracks and is polymer fortified for added durability. "



I didn't have good luck either with the caulk tube crack filler. Applied it to a t, right temperature, cleaned crack out by removing loose stuff with screwdriver and then vacuumed it out and noticed a couple years later the caulk is partially gone.

 

There is a difference between filling the cracks and making them disappear. It's next to impossible for any sealer or filler to completely hide a crack.