Method of sealing a vehicle lighting fixture

A method of bonding a lighting fixture body and a lens both made of plastic which generates gas when heated, comprising the steps of:

• adding absorbent having gas absorbing cavities to a hot melt adhesive, so as to mix and disperse said absorbent in said hot melt adhesive;
• heating and thereby melting said hot melt adhesive having said absorbent, containing gas absorbing cavities, dispersed therein;
• filling melted said hot melt adhesive containing said absorbent having gas absorbing cavities, in grooves provided beforehand in said lighting fixture body of plastic;
• inserting anchoring parts of said lens of plastic into said grooves;
• and
• placing said lens and said lighting fixture body in close contact until said hot melt adhesive cools down and solidifies,
• wherein gas generated from said lighting fixture body and/or said lens by the heat of said hot melt adhesive is absorbed by said absorbent having gas absorbing cavities contained in said hot melt adhesive, such that no foam resides in the interface between said lighting fixture body and said lens.