Sephora shoppers are blown away by the results they're getting from using a hair mask. The K18 Leave-in Molecular Repair Hair Mask is £70 at the retailer, and you also get an extra 5ml sample of the mask when you spend £40 on K18 at Sephora. You can also get the mask for £70 at Cult Beauty , £54.

99 at Superdrug , and £51.66 on Amazon. The leave-in hair mask promises to clinically reverse damage in four minutes.

It's designed to repair damage from bleach, colour, chemicals, and heat by restoring strength, softness, smoothness, and bounce. READ MORE: Hairdresser-recommended SOS hair mask that 'hydrates hair for 100 hours' now only £6 on Amazon The mask uses K18Peptide to reconnect broken keratin chains in the hair. To use the mask, simply apply a very small amount to freshly washed hair, let sit for four minutes, then style as usual.

The mask has 4.53 stars at Cult Beauty , 4.8 stars at Superdrug , and 4.

1 stars on Amazon . At Sephora , it's got 4.4 stars from 3,474 reviews.

To see all the best Deals, Sales and Bargains in London, check out our Facebook group . One person said: "Wonderful frizz fighter. First time trying it out.

After the first use I have a noticeable difference with my frizz. I am very pleased and hope to see continued results after being at my wits end with the frizz!" Another wrote "I can’t say enough good about this product. I had terrible bleach damage and after using this product, my hair became healthy again! It also feels so nice in the hair and.