Beger Water Block Primer B-3100Ultra-premium solvent-based multipurpose primer with moisture resistance 75% for exterior and interiorIt is suitable for all surfaces, including fresh concrete, old concrete, or wet concrete after the rain. Its white pigments offer excellent adhesion and hiding coverage. Beger Water Block Primer also provides resistance and protection against peeling, blistering, efflorescence, alkali, fungi, and algae.Film Type: WhiteApplication Area: 25-35 sq.m./gallon/coat