4X PROMATIC STONECHIP UNDERBODY BLACK  COATING - 1LPROMATIC US-1 IS A THICK,BITUMINOUS BASED PRODUCT THAT IS IDEAL FOR VEHICLE UNDERBODY COATING TO GIVE BOTH RUST PROOFING AND SOUND DEADENING PROPERTIESTHIS PRODUCT STAYS FLEXIBLE WHEN CURED AND DOES NOT SAG WHEN APPLIEDAPPLIES IN ONE COAT WITHOUT DRIPPING.PROTECTS AGAINST CORROSION AND STONECHIP PRODUCT IS OVER PAINTABLEAPPLY WITH A CLEAN UNDERSEAL GUN OR BRUSH