Hi Lin! Thank you for your interest in our Magic Root Cover Up. We never advise mixing our permanent haircolor. The Cover Up spray is a temporary haircolor that washes out after one shampoo, so it would be okay to layer different colors, but we do not know what the foreseeable results could be. It is possible that the layering of colors could come out to be too dark. When using the spray be sure to shake well, and hold can 4-6 inches from hair. Spray color onto new growth and partly through the length of the hair to blend in the color.

Hi there! Thank you for your interest in our Magic Root Cover Up. In regards to your question, sulfates in shampoos are surfactants which function as foaming agents and emulsifiers. The term "sulfate" refers to the sulfate portion of the molecule. This portion of the molecule is associated with greater cleaning and foaming effects. Sodium lauryl sulfoacetate and disodium laureth sulfosuccinate are also foaming agents and emulsifiers but the sulfate portion of the molecule has been replaced. These ingredients are not chemically classified as "sulfates" and are generally perceived as milder surfactants. Chemically, surfactants clean by binding dirt and grease while remaining dissolved in water. The salt portion of the molecule, of which sodium is a part, allows it to remain dissolved. We always recommend reading the ingredient list on the back of your product before using it if you are concerned. We hope this helps!

Hi Lin55! We are sorry but we currently do not have a shade suitable for Light to Medium Auburn. We will pass along your comments for more selections with red. Please feel free to reach out to us directly for any further assistance we would love to help!

Hi there! Thank you for your interest in our Magic Root Cover up. Our products are safe during pregnancy and while nursing, when used properly. Although there are no specific safety tests for products during pregnancy and nursing, there is a substantial amount of information supporting the safety of products when used as directed. If you have any concerns, we recommend that you consult your doctor. We hope this information helps!

Hi There! We are so excited to hear that you are interested in our Magic Root Cover Up. Based on the information you provided us with, we suggest Medium Brown. For optimal application, hold the can 4–6 inches from dry hair and spray. Wait a few minutes for color to dry completely. Tip: Don't spray too much at once, too close to the hair or too much in a concentrated area! Color is more visible as it dries and this avoids it feeling stiff. We hope this information is helpful!

Hi There, Thanks for reaching out! We suggest you shampoo and wait 24 hours to apply your hair color, to ensure good results. Thanks for your interest in L'Oreal!

Hi SalllyR! Any styling products in the hair can act as a barrier to the haircolor. For best results, we recommend washing the product out of the hair and waiting 24 hours after washing to color the hair. We hope this is helpful!

Hi Nazu! Thanks for reaching out to us regarding Root Cover Up Spray. This product is intended for the root area of the hair. You can choose the color based upon the color treated portion of your hair. If you have highlights and use this product, you may temporarily cover the highlighted hair. We hope this is helpful.