The spray appears similar to white paint or watered-down shaving foam when initially applied.
[1] Its use in football is not regulated by the Laws of the Game, with authorisation being in the hands of the governing body of a match, league, or tournament.
Vanishing spray is applied from an aerosol can carried by the referee in a holster secured to their shorts.
The bubbles eventually collapse and the foam disappears, leaving only water and surfactant residue on the ground.
In 2000, Brazilian inventor Heine Allemagne developed the spray under the name "Spuni" (from espuma, the Portuguese word for foam).
In June 2014 the spray's latest commercial version, "9-15", made its debut in the FIFA 2014 World Cup.