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Replace helmet padding in a motorcycle helmet himself. In the example of demonstration a motorcycle helmet inner padding.
The inner padding of motorcycle helmets is part of a very soft foam. Thus, the foam is nice and soft, much plasticizer in it. The plasticizer evaporates over time, alone of in the air and the foam is porous. The foam crumbles. This is an unpleasant thing in a helmet. Not just because this happens after a few years and it is also found in very expensive helmets, but because the crumbs go to the hair and spread everywhere. Some helmet inner padding that is sewn into fabric. Then only crumbs are in the fabric and it has no upholstery. In such cases, the material can cut out and eventually refilled again be installed / sewn.
First, the old foam has been completely. Remove the old foam inside the helmet thoroughly with a vacuum cleaner, a brush and a damp cloth.
In the example, an old mattress is used as a material resource. The foam and felt a mattress is wonderful for the upholstery. It can also be purchased new material. The thickness of the foam must each own testing. In some ranges a thinner layer, with others it must be a thicker until very thick.
The best options are three strips of foam. In order to cover a layer of felt. The important thing is that the felt is thick enough so that it does not crease and generates disturbing knob that generate during the prolonged wearing pressure points and pain.
The introduction of the cushion can be done with glue. This adhesive is used for Styropor® and plastic. Other adhesives dissolve the inner helmet shell in air. The adhesive should not be too much to penetrate the foam. An instillation is best. The foam with the adhesive must be pressed softly and over a longer period in the helmet inner shell until it holds.
A better method is to sew the foam and felt together. Possibly also with the other solid helmet padding.
For a better ventilation of the head holes or slits should be cut in the felt.
Exclusion: No guarantee. No warranty. Copy at your own risk.
Helmets save lives. Think if damaged the helmet and in older helmets on a new purchase. For many helmets there helmet inner padding accessory retailers. However, not for all. There is this video.