1.   Q. I know that driveway sealer is mostly cosmetic, but I plan to seal my driveway to fill the cracks.

2.   Remember, though, that driveway sealer is mostly cosmetic.

3.   The stuff the man used may be motor oil or similar product, not ncessariy designed as a driveway sealer, which promises to stay sticky forever.

4.   This time it is for his opinion that driveway sealers are mostly cosmetic.