Good Dye Young Semi-Permanent Hair Colour Rock Lobster is a dye with salon grade pigments that does not damage hair and will last 16-24 washes. Rock Lobster is the brightest electric red with pink undertones in a non-toxic cream base, ensuring bold, bright colour payoff without damage. Rock this vibrant lobster red from the dye tube to your head. Best colour payoff on level 7 hair.