GTechniq - Car Care Products - L1 Leather Guard - 100 ml Description A correctly maintained coating of L1 will greatly reduce instances of wear through on prone areas of leather or vinyl seats such as piping and leading edges. It also makes any die transfer much easier to remove. GTechniq L1 Leather Guard offers the best of its type protection against friction and staining. The friction protection is particularly important on seat bolsters, seat piping and any other high wear areas. The anti stain function is particularly worthwhile on light coloured leathers that are typically stained by dark coloured fabrics such as indigo jeans.