Gtechniq C4 Permanent Trim Restorer 1 fl oz — long-lasting UV-resistant plastic & rubber restoration

Gtechniq C4 Permanent Trim Restorer is a micro-thin, chemically bonding coating that permanently revitalises faded plastic and rubber trim while shielding it from UV and water.

Gtechniq C4 is a professional-grade trim restorer in a compact 1 fl oz bottle designed to bring dull bumpers, mirrors, and side mouldings back to a like-new appearance. Unlike temporary dressings that sit on the surface, this formula swaps part of its molecular structure with the vehicle’s plastic or rubber, creating a durable, invisible layer that resists rain and sunlight. A small amount covers multiple components, making it economical for detailing sessions at home or in a professional workshop.

How does C4 actually restore faded trim?

C4 works by chemically bonding with the trim’s surface rather than merely coating it. The bond changes how the plastic or rubber reflects light and returns the original colour depth and matte finish that time and UV exposure removed. Because the product becomes part of the substrate, the restored look lasts far longer than surface dressings.

• Forms a molecular bond with plastic and rubber for lasting restoration
• Restores original colour, deepness and matte appearance
• Does not leave a greasy or shiny film—visibly natural finish

Is C4 easy to apply and how much will I need?

Yes — C4 is concentrated, so only a small amount is required. Apply sparingly with the recommended applicator or cloth, spread evenly, and allow it to cure. One 1 fl oz bottle is sufficient for multiple applications across bumpers, mirrors, and side trim depending on surface area and condition.

• Concentrated formula: a little goes a long way
• Suitable for bumpers, wing mirrors, side mouldings and trims
• Simple applicator technique—no complicated tools needed

Will C4 protect trim from weather after restoration?

After bonding, the coating helps shield trim from UV degradation and repels water, slowing future fading and staining. While it isn’t a substitute for other paint-protection systems, it offers targeted durability for plastic and rubber elements exposed to sun and rain. Reapplication frequency depends on exposure and wear, but the chemical bond extends longevity beyond traditional topical products.

• Provides UV resistance to reduce further fading
• Repels water and light contaminants for easier maintenance
• Outlasts standard surface dressings thanks to molecular bonding

Who is this for: Gtechniq C4 Permanent Trim Restorer suits car owners, detailers and enthusiasts who want a professional-grade, long-lasting solution for faded exterior plastic and rubber trim. It’s ideal for people seeking a natural, non-greasy finish and a cost-effective product that covers multiple trim pieces. If you maintain high-end vehicles, restore cars for resale, or simply prefer durable results over temporary shine, C4 delivers a compact, scientifically engineered option.