Colour Stability

Colour stability matters for two reasons: visual appearance (consistent tint level over the car's life) and performance (a fading film loses heat-rejection capability).

Ceramic and multi-layer films are colour-stable by chemistry — the rejection mechanism isn't based on organic dye. Carbon films are partially stable; dyed films are not.

For Singapore conditions where direct sun on parked cars is the norm, colour stability is a meaningful differentiator at the time of purchase.