For some women, keeping their hair looking glorious is no small task. Monthly colourings can add up to hundreds, if not thousands, of dollars a year. So what happens when your roots start showing, and you can’t colour your hair right away?

Consumer Reports tested eight of the new root touch-up products that promise to help. All of the products are used on dry hair. Some are sprays, some are markers and others are packaged like lipstick or paint on with a brush. They are all supposed to wash out when you shampoo.

Panelists tried them to see how well they matched their hair colour and how well they covered the gray.

The panelists found most worked well and particularly liked the $23 Oscar Blandi Pronto Colore. It did a good job covering grays and comes in a range of colours that matched well, but it’s only available in the U.S.

A close runner-up is the Roux ‘Tween Time for around $8, which comes in five shades. You wet the crayon-like tip to apply.

Consumer Reports has one caution about some of the other root touch-ups. Those with spray applicators can make your scalp extremely cold. So follow the instructions carefully and don’t spray them for too long or too close.