42 Advantage card points. OPI Natural Nail Base Coat 15 ml. Get your nails summer-ready and take your natural nails to salon-level with this Natural Base Coat. This expert formula is perfect for your summer nails, providing the ultimate base for any OPI nail polish and promoting a long-lasting, chip resistant manicure with up to 7 days of wear - ideal for busy UK summers. Creating a protective layer on nails, this high-performance base coat acts as a nail strengthener or natural nail polish for clear nails, preventing stains from bright summer shades and gripping nail polish for a longer-lasting, chip resistant manicure. The perfect foundation for your summer nail looks, OPI Natural Nail Base Coat is a manicure essential. A must-have in every manicurist’s collection, the OPI Natural Nail Base Coat helps to bond your coloured polish and prolong its wear. Expertly designed to provide the optimal base, the formula provides up to seven days of chip-resistant coverage as it creates a protective layer over the nails. Use to prep before your favourite polish, protect from staining of darker colours or swipe on for a clear shine.