Hairline cracks are common and often caused by movement or vibrations. While not structural, they can grow worse over time if left untreated. These areas are prone to cracking because wall studs are cut to make space for openings, weakening the support. Simply painting over the cracks won’t work—what you need is a flexible, long-lasting solution. BUILDRITE BLOCKOUT SAPAL 2-IN-1 is a paintable elastic sealant and waterproofing material that bridges cracks and withstands structural movement. Ideal