StoPrime® Hot

StoPrime® Hot — Alkali-Resistant Primer for Fresh Stucco and Masonry Walls
Speed up your project timeline with StoPrime® Hot — a professional-grade acrylic primer designed for freshly applied stucco, masonry, and concrete. Its alkali resistance (up to pH 13) allows earlier application than standard primers, letting you paint sooner without compromising finish quality.

Need a primer that works on hot, new substrates? StoPrime® Hot delivers fast, reliable results.

• Alkali-resistant to pH 13 — apply on new concrete or stucco faster
• Acrylic-based formula ensures strong paint and coating adhesion
• Vapor-permeable to prevent blistering and promote surface longevity
• Low-VOC and water-based for safer, eco-friendly job sites
• Ideal for EIFS, stucco, concrete, masonry, and previously painted walls

System Composition & Coverage

• Application method: Brush, roller, or spray
• Coverage: ~1100–1350 sq ft per 5-gal pail, depending on surface conditions
• Compatible with: Sto acrylic paints and wall finishes, including StoColor® systems

Product Bulletin

Safety Data Sheet