The science behind trim restoration on a car primarily involves reversing or mitigating the effects of UV radiation, oxidation, and environmental contamination on plastic, rubber, or vinyl surfaces.

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UV Degradation

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Plastic, rubber, and vinyl trim pieces are susceptible to UV degradation. Prolonged exposure to ultraviolet radiation breaks down the chemical bonds in these materials, leading to fading and chalkiness.

 

Trim restoration products contain ingredients like UV absorbers and stabilizers that help to protect and repair the material. UV absorbers are chemicals that soak up harmful UV rays, reducing the impact on the trim.

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Polymers and Dyes

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Trim restoration products may also include polymers and dyes to restore color. Polymers can bond with the surface, creating a protective layer that helps repel water and resist future fading.

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Some products use dyes that are absorbed into the trim, which helps bring back the original color.

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Plasticizers

 

Over time, plastic trim loses its plasticizers—substances added during manufacturing to increase flexibility and durability. This loss makes the plastic brittle and more prone to fading.

 

Trim restoration products often include conditioners that help restore the trim’s flexibility. These conditioners penetrate the surface, replenishing lost plasticizers and helping rejuvenate the material.

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Hydrophobic Coatings

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Many trim restorers leave behind a hydrophobic coating, which repels water, dust, and other contaminants. This coating not only improves the appearance but also protects against further weathering by preventing moisture penetration.