The disclosure pertains to a sleeve cover for a slider clip which is used for such applications as high pressure pasteurization wherein high pressure is applied to a reclosable bag, including a zipper and slider, which typically includes foodstuffs such as meat products. The sleeve cover is molded, glued or otherwise attached, to the slider to prevent the film of the bag from pressing against and entering the interstices between the slider and the zipper profile and subsequently deforming, pinching or rupturing.