.ctl-vulcano-pdf-prepass-container{
    background-color: #fff;
    position: fixed;
    height: 100%;
    width: 100%;
    overflow-y: auto;
    top: 0px;
    left: 0px;
    z-index: 999999;
}

.ctl-vulcano-pdf-prepass-container:after{
    background-color: #fff;
    position: fixed;
    height: 100%;
    width: 100%;
    top: 0px;
    left: 0px;
    z-index: 999999;
}