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Gtechniq C4 Permanent Trim Restorer (15ml & 30ml)

View Reviews five star rating for product page Product code: C4-15
Price: £22.50
In Stock

Restores External Car Trim To 'As New'

C4 Permanent Trim Restorer from Gtechniq helps to revive the external trim on car to an 'as new' condition without altering gloss level. Strong UV absorption filter and chemical bond ensures maximum durability with a single application and typically helps to maintain a flawless finish for up to two years.

C4 uses a covalent or chemical bond to actually become an extension of the plastic molecule it's protecting, swapping part of its molecular structure with the surface molecules of your car's trim to provide a protective coating of unparalleled durability. Revitalise tired and faded trim such as those found on wing mirror surrounds, windscreen wipers/trim, bumpers, mud-flaps, engine bays and more.

Features & Benefits:

  • Provides thin clear film - does not add sticky gloss
  • Restores all but the most faded trim to 'as new'
  • Suitable for use on the trim found on bumpers, windows, wing mirrors, doors, mud-flaps, engine bays etc
  • One application can last up to 2 years
  • Use on correctly prepared surfaces for maximum benefit
  • Download: How To Use Guide

Directions for use:

  • Before starting ensure you have enough product for all intended trim surfaces. E.g For a Mini (30ml) you will require more product compared to a Golf (15ml)
  • Ensure work is carried out in a well-ventilated environment, at temperatures of 5 degrees Celsius and above
  • Do not apply in direct sunlight & always wear the gloves provided
  • Ensure intended surface(s) are free from contaminants
  • For best results clean trim with a neat solution of W5 Citrus All Purpose Cleaner, and if required use a medium-stiff brush
  • Ensure intended surfaces dry and cool to the touch prior to product application
  • Soak the pad with several drops of product
  • Use the AP1 Lint-free Applicator supplied to spread the coating onto the surface of your trim
  • Once the product has spread over all intended trim, gently wipe away residue immediately with a clean, dry microfibre buffing cloth
  • For heavily textured trim take the time to ensure all crevices are covered, and that all residue is also removed
  • Allow the coating to cure for 12 hours before exposing to the elements
  • Use the product within 3 months of opening
  • Store in a cool, dry place

Sizes: 15ml & 30ml (Select from drop down menu above)

Please note: Due to Civil Aviation Authority (CAA) legislation, we are unable to ship this product by Air. For European destinations please select European Standard By Road from the available delivery options during checkout.

Material Safety Data Sheet (MSDS)

Customer Reviews

five stars 31 Jul 2021


I cannot emphasise how good this product is. I gave the old faded black trim a good wash and then using a nylon brush scrupped at the trim. Applied the trim restorer and my 2006 Mini JCW has never looked better. It can certainly withstand the rain and last much longer compared to previous trim restorers I have used. Worth every penny. Highly recommend getting for faded black plastic.

five stars 29 Mar 2016


After reading the all reviews I decided to buy this, I am glad I did I have an X5 and the bumper was grey not black . This has restored it and it looks like new. I do wish I had bought the larger size to do inside as well. I cleaned all the exterior bumpers with panel wipe, then applied. Come on UF put more pads in 4 is not enough. I have taken before and after photos. I am really pleased with the end result, I have tried many other bumper revival products that all failed.

Paul Jay
five stars 29 Oct 2015

Incredible stuff

The external plastics on my Wife's 2008 Polo GTi had faded to grey and all the products I'd tried previously looked OK for a week or two but then washed off. After thoroughly cleaning all surfaces with isopropyl alcohol first, I just used cotton applicators and the plastics are just like new. It's completely transformed the look of the car.

five stars 04 May 2015

Excellent product

I purchased the C4 for my fathers Transit connect van. This van has a lot of plastic trim! We had tried the usual trim restorers (the kind you get in Halfords) but the tired looking plastic on the van was too far gone. After some internet research the gtechniq C4 came up a few times mainly from professional detailers. Decided to give it a go and we got the 30ml bottle as the connect has all that trim.Tried it first on a small area and it was clear we needed to clean the trim very thoroughly witch we did with r222 APC. The results were fantastic. C4 seems expensive for such a small bottle but it is money well spent. The 30ml bottle was plenty for the connect and i would think a 15ml bottle is enough for an average car.

five stars 26 Feb 2014

C4 Trim Restorer

Excellent product. Small bottle, but a little really does go a long way. Used as part of a detail I did on my parents 4 years old Focus. C4 brought the trim up like new and easy to apply. Also used P1 with medium & finishing pads and applied C1 Crystal lacquer & EXO v2 to the paintwork. Glass cleaned with G4 and treated with G1. C5 applied to alloy wheels. Interior fabric treated with I1. The car looks stunning and my parents were proud to display the Gtechniq sticker. I would agree however that Gtechniq could be a little more generous with the application pads. I did have just about enough, but if you drop 1 or 2 you could run short.

five stars 25 Sep 2013

Trim restorer

What a small bottle of product, but what a punch it makes. Used this on my father in laws thirteen year old Vauxhall Astra trim which was badly faded. I never thought that it would cover all the sills and door trim but it really did and I still had a quarter of the bottle left. I only used one pad. I followed the instructions on the attached video by Gtechniq and it could not be more user friendly. Father in law wouldn't let me put the G Techniq sticker in the window so I’ll be putting it in mine. I really can’t rave about this product any more. Thanks UF for another prompt delivery on another quality product.

five stars 10 Sep 2012

Trim restorer

C4 it does what i being said about it. Good prepping work is a must as you would expect getting the best result! I did my 1996 golf mk3 with it. and looks superb. good application enough pad for application to! The help and advice i gotten from UF and Rob from Gtechniq was really helpfull! - no more sorrowfull dressing that last a couple of weeks but a durable coating for the amount and money you spend I still call it a good investment, just calculate what you will be using in one year. I found that C4 is the clear winner! Great support form UF and Gtechniq Rob! Highly Recommendable product! Don't let the used pad dry up if you still are needing them! finish what you have started.

G Bhambra
three stars 07 Apr 2012

Expensive for what it is and does not come with enough application pads as stated in above review. Also spoke to G Techniq for advice on how much I would need for the entire interior of an Audi A3... guess what? I ran out. Now I have a brand spanking new looking interior but a driver side door that looks aged. It has made a noticable difference to the slightly faded plastics and even got rid of one minor stain - plastics have a lustre added to them. I wish I had been warned about later applying it in the same place. I used this around the passenger door edge and realised I had missed a spot. I went back to re-apply it and now I have a streak of dull plastic where I tried to touch up the missing area. So I guess you need to get it right first time. It is very powerful though so advisable to use it up to every edge and corner otherwise the dull plastic sticks out like a sore thumb against the restored surface. 3 stars due to the wait time for the product, lack of advice and tips from G Techniq.

four stars 09 Oct 2011

Trim restorer

The product and application is very good and the finish like new. This is especially effective on ruff plastic found on ford's,jags but not so on flat serverly discoloured or stained plastic.  The only reason that I cannot give a 5* is the price and bottle size. I would recommend but the product could do with including some more app pads.

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