The Heavy Duty Poly Clay Bar and Lubricant Detail Spray Kit easily and safely removes stubborn contaminants that cannot be removed during the regular washing process. Stubborn surface damaging contaminants such as tar, tree sap, bird droppings, bug smear, embedded road grime, paint overspray and more can leave surfaces rough and gritty. This poly clay bar is ideal for removing those harsh contaminants. This bar is ideal for new and recently purchased vehicles. It will safely remove contaminants from the vehicle without any need to scrub the surface too hard. This fine clay is smooth and so fine it will help maintain the finest finishes, delivering a sleek, smooth finish. Light enough for everyday use, yet its superior elastic structure cleans even tough contamination without scratching. Clay bars can be used as often as you like or simply prior to waxing or polishing your vehicle. To acquire the best smooth as glass touch and feel results, it is important to always use clay bar on your vehicle prior to application of wax, glaze, polish or paint sealant. Always use a lubricant with your clay bar. The clay bar lubricant, Luber, works best with clay bars. This refill kit comes with a storage case for the clay bar. This kit comes complete with Luber Surface Cleaner. Luber is a high lubricity lubricant that is specially formulated to increase lubricity and reduce friction. Luber lubricates paint, delivering a slick, non-stick surface so that the clay block is easily and gently glided across the vehicle's paint surface removing dirt, grime, rail dust, water spots, tar, bugs and more.