What's the name for the "blocking" stickers used on car headlights?

I'll be driving my car from Belgium to the UK, with plans to then drive around the country.

Like most cars in the European mainland, my car's headlights/headlamps are slightly adjusted to the right side of the road. When driving in the UK, though, this blinds oncoming traffic. That's why there's a type of sticker made to apply to headlights to prevent this problem, and why these stickers are required in the UK for left-hand drive cars.

When I lived in the Netherlands, you could buy them in almost any town. In Belgium, where I live now, few shops sell them.

I'm having trouble finding them, partly because I don't remember what they're actually called. Does anyone know the proper name of these "blocking" stickers so I can search for them on the Internet?

Best Answer

In the end I ended up buying the stickers on the ferry from France to the UK, actually cheaper then any offer online, even excluding the postage. I now still have them in my car unused, since I did not drive at night.

But the stunning thing I would like to mention is what I just read in a brochure of the Dutch automobile association. If you are not able to buy these stickers, a piece of black tape is sufficient. It only takes a bit more preparation. You need to point your lights to a wall and notice the slight deviation to the right (left for UK cars), then try to block this with black tape. It might seems like an odd advice, but I guess givem it is from a reliable source it's worth posting.