tarmac looking grubby

Hi, we had our drive tarmaced two years ago,We were not expecting it to keep its brand new look for ever but it now looks as if was not done in ten years.I have read that there is a solution to this rather than digging it up again.Is there a roll on cover to give it a fresh look or did I imagine that I read this somewhere.Any help appreciated,Salaried.

Our tarmac down four/five years now. Husband powerwashed it with heavy duty powerwasher and its like brand new this summer. We have terrible old trees on the neighbours property and so terrible moss growth.

There is a product called "thompsons drive seal" which you paint on and the driveway looks new again. It works out expensive however and so is probably only suitable for small areas. It comes in 5L drums.

Sandals and homebird ,Thanks for your replies.I have not got around to powerwashing it yet but will give it a try.If all else fails I will try the drive seal. I had heard of this before but for the life of me could not remember the product.Thank you both for your advice.