There's nothing quite as disappointing as realising you've managed to mar the interior of your car by putting a burn mark in the upholstery. Regardless of how the seat was burnt, it is possible to make a fix at home without replacing the entire seat.
Fill the hole in the car seat with the foam rubber material.
Cut a piece of material from the iron-on clothing patch. The piece should be just slightly larger than the size of the hole you are repairing.
Insert the cut piece of clothing patch into the hole with the glue side facing up. Make sure that the patch is flat and has no wrinkles.
Take the razor blade and shave some excess seat fibres from the excess material on the underside of your car seat.
Place the fibres you shaved off of the underside of your car and place them on the patch you have inserted in the burn hole. Make sure the entire burn hole is covered completely.
Iron the area over the burn hole until the fibres completely cover the burn hole and patch. Add additional fibres from the underside of your seat if necessary.
Use the razor blade to gently shave away any excess fibres you added as a result of the fixing process. When you are done, the fibres should blend in with the rest of the seat and the burn hole should no longer be visible.
Fixing a burn mark that has not gone all the way through the seat is even easier. Skip the steps regarding the clothing patch and instead place a tiny drop of superglue on the burnt area. Apply the fibres you shaved from the underside to the glue and shave the excess once the glue has dried.
Use caution when working with sharp objects. Wear protective gear/gloves if necessary. Use caution when working with hot tools such as the clothing iron.