General Finishes NEW Exterior 450 White is a water-based exterior-rated pigmented coating for use on vertical surfaces such as outdoor kitchens, entry doors, garage doors, and windows. Exterior 450 White is a selfsealing flexible finish that moves with outdoor conditions with superior adhesion over multiple substrates, such as PVC, exterior MDF, composite material and fiberglass. It’s tintable to light or pastel colors with zero VOC colorants.