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CO by Andrew Collinge – Finishing Gel Serum Definer
CO Gel Definer is one of our best hair styling products for men and women with short to medium length hair. This gel serum definer is great hair care product for controlling frizz and adds great shine to the hair as well as smoothing split ends.

A favourite hair care product in our hairdressing salons, the gel Definer is an incredibly versatile gel product for both women’s and men’s hair. It creates shiny hair and is one of our best-selling hair styling products. This hair texturizer is a great hair product for men and women.

Brilliant shine.
Smooths down flyaway hair.
Controls frizzy hair.
Redefines curls.
Creates soft texture for shorter styles.
Non greasy gel.
Travel size.

Apply the gel to dry hair. Work a little product between fingertips, apply to mid lengths and ends of the hair.

To refresh curls between shampoos, apply product to fingers and rake through your hair to tame frizz and define curly or wavy hair.

Gel Definer can also be applied to smooth and seal split ends on longer hair.

Hair Types
Normal to dry hair. Coarse hair. Frizzy hair. Curly hair. Damaged hair. Short to medium length hair.



For guaranteed Christmas delivery, please place your order by 19th December.

Free UK delivery. Orders placed before 12.00 pm will be despatched on the same day (Monday to Friday). Full details of our delivery service can be found in the Terms & Conditions.

Aqua (Water), Ceteareth-30, PEG-7 Glyceryl Cocoate, Glycerin, Paraffinum, Liquidum (Mineral Oil), Propylene Glycol, Benzophenone-4, Parfum (Fragrance), Limonene, Coumarin, Linalool, Diazolidinyl Urea, Iodopropynyl Butylcarbamate.

Free from
Parabens, phthalates.

Customer Reviews

Based on 3 reviews
Miracle product

Great for defining style and combating frizzy ends. Couldn't do without it.


I was really excited when I found this and purchased because a review said it was like the good old design & shine which I used for years before it was discontinued. Not too sure though. Drags a bit through hair when trying to apply. I will carry on using and will try and find another product to mix with it to see if I can get a better consistency but for me it is too thick.. more like a hair gum.

Hi Andrea, thank you for your review of Definer. While Definer is similar to Design and Shine, there are some differences which we believe deliver an even better performance and result. I'm concerned though you are not getting the the result you desire and have set our below a few tips that might help. Definer is still very much a gel type serum and therefore requires very little product on application to get the desired result. The new formulation is very slightly more viscous but again we feel this is a good thing as it helps give greater definition. To apply the product and to avoid any drag rub a little product between the tips of your fingers before working them through your hair. This rubbing of the fingers will and make Definer even more pliable, ensuring it glides evenly through the hair lengths. I feel there is no need to mix Definer with another product to get the result you require and I hope my advise helps. Again, thank you for your review and for being a valued customer. Andrew

Had my long hair recently cut,and was horrified to find I could no longer find “design and shine” anywhere, it’s absolutely the best formulation for definition.Thank goodness I found it under it’s new name. Love love love it.!