Dryvit Primus® is a high-performance, polymer-based adhesive and base coat specifically engineered for use in Dryvit’s Exterior Insulation and Finish Systems (EIFS). This versatile product provides exceptional adhesion to EPS insulation boards and approved substrates, while offering superior workability and trowel consistency. When reinforced with Dryvit reinforcing mesh, Primus creates a durable, impact-resistant base that forms the foundation for a long-lasting, high-quality exterior finish system.

Key Features:

• Strong Adhesion: Bonds effectively to expanded polystyrene (EPS), cement board, and other approved substrates.

• Reinforced Durability: Combines with Dryvit reinforcing mesh to form a resilient, crack-resistant base coat.

• Smooth Application: Consistent viscosity and open time for easier trowel application and reduced waste.

• Versatile Use: Suitable for both adhesive and base coat applications within Dryvit EIFS.

• Freeze-Thaw Stable: Formulated for reliable performance in variable weather conditions.

Benefits:

• Provides a strong, long-lasting foundation for EIFS assemblies.

• Enhances impact resistance and surface integrity when reinforced with mesh.

• Streamlines application with a dual-purpose formula (adhesive and base coat in one).

• Contributes to improved energy efficiency and long-term building envelope performance.

Typical Uses:
Designed for use as both an adhesive for EPS insulation boards and as a base coat over reinforcing mesh in Dryvit EIFS applications. Also compatible with many cementitious substrates and renovation projects requiring a smooth, durable base.