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Gtechniq C4 Permanent Trim Restorer Product Reviews

100% of customers said that they would buy this item again
Based upon 11 ratings
| Write your own review

Customer Reviews

Reviewed by on
Would they buy this item again? Yes
Excellent Product!! can't speak for durability yet, but it made the trim look nearly new, on a 14yr old Cadillac we worked on last week, and the customer was thrilled. hopefully it lasts for a while too! Definitely looking forward to using it more!
Reviewed by on
Would they buy this item again? Yes
In So Cal, the sun eats up black plastic and eventually turns ashy grey in color, even after a few years. Despite attempts to keep the plastic looking black with conditioners and such, my 2012 Ram 1500 Reg Cab Short Bed was getting pretty bad. Conditioners would look good for a couple weeks, but ran off after washing or rain and left oily residue streaks.

Application: One week ago, I gave 'er a good wash and prepped all the trim as instructed. Prepping the trim took the longest time. C4 is very easy to apply, few dabs on the supplied applicators (cotton make-up remover pads) and wipe it on. Wait 5 minutes, then lightly wipe over with microfiber cloth and clean any spots off the paint.

Results: As soon as C4 hit the ashy plastic, it turned dark matte black and was coming back to life! Finish stayed consistent and is a nice deep black without being glossy. I'm blown away with how good the plastic looks, like I went to the dealer and bought all new trim. I went through the whole 15ml bottle on my truck; Ram 1500 has a lot of plastic (bumper cap, bed caps, mirrors, windshield, front air dam, etc) and most of it is really textured, so the product didn't go quite as far as I expected.

Pros: Easy to Apply, Instant Results, and makes black plastic look like new
Cons: Should have bought 30ml for a truck (or any vehicle with lots of plastic trim), Should have done it sooner...
Reviewed by on
Would they buy this item again? Yes
I bought a nine year old used car and wanted to restore the faded trim. The C4 did a very good job of bringing the black back to the faded trim without making it overly glossy. I only prepped a few areas as I didn't know how far the C4 would go. I still have 3/4 of the bottle left so I will be able to finish all the weatherstripping on my car. As long as the coating holds up durability wise I would say this is a very good value.
Reviewed by on
Would they buy this item again? Yes
Great product - love all of Gtechniq's coatings. Can't speak on longevity as I just finished applying it to the black trim of my motorcycle.
Reviewed by on
Would they buy this item again? Yes
I have tried all of the trim restorer products in an attempt to get the plastic trim on my 2006 Infiniti to appear somewhat presentable, with the bottom line being that it was so-so at best. Usually, the trim went back to looking cruddy after I washed my car. Tried this stuff here and was blown away with the result AND the durability. I'm reluctant to spend the kind of money they want for this trim product, but in this case it was well worth it. It's been 4 months now since applying it, and through all types of weather conditions and washing this product has held up. It is easy to apply, but the surface of the trim must be clean.
Reviewed by on
Would they buy this item again? Yes
I have a dark grey metallic Subaru STi. I was getting tired of the whitish fins on the side where the side-view mirrors. The sun really took its toll on them. I bought this off a 25% discount sale from DI. I applied this and left it on for 5 mins. I wiped it off and applied another coat and left it on. I did that 3 weeks ago and I was amazed with the results. I thought it would fade off like all the other products do. I applied this 3 weeks ago and it looks brand new still. The water beads up on top of the surface after it rains. It is def an awesome product. I decided to do the entire door trim with it, some plastic pieces in the front grille area and the rear bumper area where I have black plastic. I still have half of a bottle left. This stuff goes a long way and it's totally worth the money. Some people see the price and say "That's too expensive..." which is true. If you have any sort of black plastic pieces that you can tell the sun took its toll on it, buy this. You won't be sorry.
Reviewed by on
Would they buy this item again? Yes
I bought a bottle to use on my 2011 X5 and it brought all the trim back to better than new. It LOOKS GREAT. So good that I bought another bottle for my 2014 and 2016 vehicles. Pros: Easy to use. Cons: I can't find any. I highly recommend this product!
Reviewed by on
Would they buy this item again? Yes
Product on my 2004 X3 for a few weeks old now. It did all that the claims said it would. If this withstands the test of time, it's the greatest stuff ever !
Reviewed by on
Would they buy this item again? Yes
This stuff is crazy good. Prep work is key as in anything we use. Once the surface is properly cleaned, I use an applicator pad with a few drops of this and wipe it on, I let it sit for a few seconds and lightly wipe with a clean micro to eliminate smearing. The results are incredible and will add thousands of dollars in value to the vehicle.
Reviewed by on
Would they buy this item again? Yes
Pros of this product, id have to say that it is simple to work with and beads water. Cons are that if you do not wipe off the excess on the trim it will stay glossier than the rest. My experience using this was super easy. Used an applicator, gloves and an all purpose micro fiber towel. Nothing to fancy and my results were like new. The trim on my 2006 subaru sti was faded and just about 10 years old. I never really gave my trim much attention cause other products out there never really last. I must express prep is key when you apply this product or any other product. You must clean the trim very well to remove dirt oil grease or whatever is on the trim and then use an ipa to ensure it is clean. If your towel is coming up black you must keep cleaning this is not a cheap product and you want to do it right the first time so clean well and this product will do what it claims extremely well.
Reviewed by on
Would they buy this item again? Yes
Applied C4 to the wife's new car on 12/28/2013. Very easy to use and A LITTLE GOES A LONG WAY!
Just be sure to clean the trim surface you are about to coat. I used an APC, 50:50, mix three times then a final IPA wipe.
Dries quickly once applied just follow the instructions. Will post in the future with results.

Update: The car has seen various winter weather along with road salt and the finish is still as good as just applied.

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