The lower window seals on an old car or truck have a pretty important job to do.

Not only does a good seal keep dust, grit, and pollen from slipping down the glass into your door, it also deflects rain and snow—which goes a long way towards preventing rust from attacking the inside of your door skins.

But the thing is, those seals are often the first to deteriorate on a vehicle, thanks to their exposure to direct sunlight and the constant up/down cycle of your windows.

The good news is, they’re not too difficult to replace—and this video from the body repair experts at Auto Metal Direct will show you.

Though the vehicle in the video here is an old Dodge D-Series truck, in our experience the job is pretty similar for a lot of other domestic cars, trucks, and SUVs. Better still, Auto Metal Direct makes a range of individual weatherstrip seals for a ton of different vehicle makes too.

So if your lower window seals are looking a bit rough, check out this video and learn how it’ll probably only take a few minutes to replace them.