
Mapei
PRIMER EP4 FAST
About this itemMAPEI CERTIFIED
- Solvent-Free Composition: Primer EP4 Fast is a two-component, solvent-free epoxy primer, making it an environmentally friendly choice for construction projects. TWO-COMPONENT
- High Adhesion Strength: Provides excellent adhesion to concrete and other mineral-based substrates, with adhesion strength exceeding 3 N/mm² (EN 1542). SOLVENT-FREE
- Moisture Tolerance: Can be applied on damp substrates with residual moisture content up to 5.5% (measured with a carbide hygrometer according to UNI 10329). EPOXY PRIMER
- Fast Curing: Dries to a dust-free state in as little as 2 hours at 35°C and achieves complete hardening in 7 days. MAPEI CERTIFIED
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Uses & Advantages
Primary Uses
- Priming cementitious surfaces with residual moisture up to 5.5%
- Preparing concrete, cementitious screeds, and other mineral-based substrates for waterproofing membranes
Key Advantages
- Solvent-free and environmentally friendly
- Excellent adhesion to damp substrates with no free-standing water
- Low viscosity for effective penetration and sealing of pores
- Fast curing time for efficient project timelines
FEATURES & BENEFITS
Solvent-Free Composition
Primer EP4 Fast is a two-component, solvent-free epoxy primer, making it an environmentally friendly choice for construction projects.
High Adhesion Strength
Provides excellent adhesion to concrete and other mineral-based substrates, with adhesion strength exceeding 3 N/mm² (EN 1542).
Moisture Tolerance
Can be applied on damp substrates with residual moisture content up to 5.5% (measured with a carbide hygrometer according to UNI 10329).
Fast Curing
Dries to a dust-free state in as little as 2 hours at 35°C and achieves complete hardening in 7 days.
Wide Application Temperature Range
Can be applied in temperatures ranging from +5°C to +35°C, making it suitable for various environmental conditions.
Key Specifications
DOWNLOADS & DATA SHEETS
Key Performance Benefits
Solvent-Free Composition
Primer EP4 Fast is a two-component, solvent-free epoxy primer, making it an environmentally friendly choice for construction projects.
High Adhesion Strength
Provides excellent adhesion to concrete and other mineral-based substrates, with adhesion strength exceeding 3 N/mm² (EN 1542).
Moisture Tolerance
Can be applied on damp substrates with residual moisture content up to 5.5% (measured with a carbide hygrometer according to UNI 10329).
Fast Curing
Dries to a dust-free state in as little as 2 hours at 35°C and achieves complete hardening in 7 days.
Wide Application Temperature Range
Can be applied in temperatures ranging from +5°C to +35°C, making it suitable for various environmental conditions.
Storage & Handling Guidelines
- Store in original unopened container in cool, dry indoor conditions.
- Keep away from direct sunlight, rain, and extreme heat.
- Shelf life is 12 months when stored properly between +5°C and +35°C.

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