PC-Prime® PU 20

High-Performance Polyurethane Primerfor Superior Adhesion

PACKAGING

PC-Prime® PU 20 available 20 kg air-tight bucket

PC-Prime® PU 20 is a one-component, ready-to-use polyurethane primer formulated with solvent-based polyurethane prepolymers to stabilize porous substrates and ensure excellent adhesion for polyurethane waterproofing membranes and protective coatings. The product penetrates deeply into the pores of concrete, cementitious screeds, wood, and similar absorbent surfaces, creating a strong bonding layer between the substrate and the subsequent waterproofing system. Its low viscosity and high penetration capability improve surface cohesion while enhancing the long-term durability and performance of polyurethane membrane applications in residential, commercial, and industrial projects.

FEATURES

One-component and ready to use
Excellent penetration into porous surfaces
Improves adhesion of polyurethane membranes
Stabilizes weak and absorbent substrates
Easy application by brush, roller, or spray
Fast overcoat time
High tensile strength and flexibility
Transparent finish after application
Suitable for professional waterproofing applications

USES

Priming concrete substrates before polyurethane waterproofing application
Surface preparation for cement screeds and mortar surfaces
Priming porous substrates prior to liquid membrane coatings
Adhesion enhancement for polyurethane waterproofing systems
Suitable for wood and absorbent construction surfaces
Used in residential, commercial, and industrial waterproofing works

APPLICATION INSTRUCTIONS

Substrate Preparation
The substrate must be structurally sound, dry, and free from dust, grease, oil, laitance, loose particles, curing compounds, and other contaminants that may affect adhesion. All weak or deteriorated sections should be repaired before application. The surface should be clean and properly prepared to ensure maximum penetration and bonding performance of the primer.
Application
PC-Prime® PU 20 should be thoroughly stirred before use. Apply the material uniformly over the prepared substrate using a brush, roller, or spray
equipment. Ensure full surface coverage without ponding. The primer should be allowed to dry adequately before applying the polyurethane
waterproofing membrane or coating system. Application tools should be cleaned immediately after use with a suitable solvent while the material is
still fresh.

SHELF LIFE – STORAGE

12 months in original unopened packaging when stored in cool, dry, and shaded conditions away from direct sunlight, heat, moisture, and frost. Keep
containers tightly sealed after use.