Is a Sunstrip Legal in the UK?

Conditional

A sunstrip is legal in the UK as long as it sits across the very top of the windscreen and does not intrude on the driver's view. Bring it down into the wiper-swept area and it stops being legal.

Why?

The windscreen in front of the driver is held to a strict standard: at least 75% of light must pass through it, and nothing may obstruct the driver's view of the road. A tint band that stays right at the top, above the area the wipers clear, does not touch the part of the glass the driver looks through, so it is fine.

The MOT reflects this with a "zone" rule: obstructions within the driver's critical vision area (a band swept by the wipers, in front of the steering wheel) fail if they are more than a few millimetres. A sunstrip that dips into that zone, or a deep one that a shorter driver ends up looking through, becomes a failure.

Manufacturer sun-shade bands built into the top of the glass are made to the same principle. The safe rule for an aftermarket strip is to keep it high and shallow.

What decides if it's legal

A tint band is only allowed across the very top of the windscreen.
It must not enter the area swept by the wipers in front of the driver.
Nothing may obstruct the driver's view of the road.
The rest of the windscreen still needs 75% light transmission.

Does it depend on your car?

Where the "critical vision area" falls depends a little on the car and the driver's height, so a strip that is fine on a tall SUV can sit too low on a compact car. Keep it to the top few centimetres and it works on any screen.

Related legality guides

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Sources

This page is general guidance, not legal advice, on the rules in the UK for sunstrip. The detail varies by exact vehicle and changes over time - confirm with your insurer and the latest DVSA and GOV.UK guidance before modifying.