Hi Julie, thank you for taking the time to write a product review. Our Calcium Rich Milk Base Coat (B442) is a semi-sheer milky white that's formulated to brighten nail beds and repair discoloration for a cleaner, healthier appearance. This milk base coat is loaded with calcium to give your nails that extra boost in strength and growth. Perfect as a base for your nail polishes. So this base coat is not expected to have a solid opaque white finish. We suggest you get the Essentials Primary Collection: Bam! White (B170) Classic White Stamping Polish if you want a solid white polish. I hope this helps.