Why Use Gtechniq L1 Leather Guard? Leather Guard forms a durable abrasion resistant matte finish which offers the best ever protection against abrasion damage, UV rays, dye transfer and other discolouration. With added antimicrobial technology, treated surfaces will kill 99.9% of bacteria. Friction protection is particularly important on seat bolsters, seat piping and other high-wear areas. The anti-stain function is most relevant for light coloured leathers which are typically stained by dark coloured fabrics such as indigo jeans. L1 gives 3 to 12 months durability depending on how high-wear the area protected is. Myth buster Many leather products market themselves on how they feed leather, when in fact this is not needed. Modern automotive leather uses synthetic fat liquors which do not evaporate. Any product that is designed to feed leathers will not be absorbed by modern automotive leathers but instead, remain on the surface attracting dirt which will then act as an abrasive foreshortening the leathers finish.