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Fillers - Diffusers

Fillers and diffusers are added to some waxes and sealants to hide imperfections in the paintwork.

Most cars will get wash marks, which are very fine scratches in the paintwork which can be seen under harsh sunlight and make the car look aged.

Our aim in polishing a car is to remove these micro-scratches, but the alternative offered by manufacturers of retail car care products is to hide them with fillers and diffusers. Very few products will explicitly say this is what they are doing, but any product marketed for dark coloured cars or for black cars is almost certainly doing just that.

Fillers are to fill scratches and can completely hide micro-maring, and diffusers are often ceramic nano-beads which are there to diffuse and scatter light, which makes the light reflected by harsh scratches less harsh.

These products can be very useful and fairly effective at hiding imperfections on dark coloured cars. However, they can cause problems, as they hide buffer trails and holograms which may then be later revealed when these products, which are temporary, are burned off by the sun and worn away by the elements.

Written by . Last updated 24/02/2023 16:26