Epoxy Coatings
What They Are
Epoxy is a two-component (resin + hardener) thermosetting system that cures into a hard, dense, and highly adhesive surface.
Key Properties
- High compressive and abrasion strength
- Excellent adhesion to concrete
- Chemical and oil resistance
- Seamless, dust-free finish
- High load-bearing capacity
Typical Applications
- Basement parking floors
- Heavy traffic drive lanes
- Service areas and mechanical rooms
- Car wash bays (with chemical resistance)
Limitations
- Limited UV resistance (can yellow in sunlight)
- Less flexible (may crack if substrate moves)
PU (Polyurethane) Coatings
What They Are
Polyurethane is a flexible, elastomeric coating system with superior weathering and crack-bridging ability.
Key Properties
- UV resistant (ideal for exposed decks)
- Flexible and crack-bridging
- Impact and abrasion resistant
- Waterproofing capability
- Anti-skid surface options
Typical Applications
- Open/roof parking decks
- Ramps (where movement and vibration occur)
- Podium slabs
- Areas exposed to sunlight and rain
Advantages Over Epoxy
- Better flexibility
- Higher resistance to temperature changes
- Superior outdoor durability
System Components (Typical Build-Up)
- Surface Preparation
- Grinding or shot blasting
- Crack repairs
- Moisture testing
- Primer Coat
- Improves adhesion
- Seals concrete pores
- Base Coat
- Epoxy or PU layer
- Provides strength and thickness
- Broadcast Layer (Optional)
- Quartz or silica sand for anti-slip
- Top Coat
- UV-resistant PU or epoxy seal coat
- Provides color, durability, and protection
Performance Benefits
- Protects concrete from water, oil, and chemicals
- Prevents dusting and surface wear
- Enhances safety with anti-skid finish
- Easy to clean and maintain
- Long service life (5–15+ years depending on system)
Thickness Range
- Light-duty: 0.5–1.0 mm
- Medium-duty: 1.5–2.0 mm
- Heavy-duty / ramp systems: 2–4 mm
Maintenance
- Regular cleaning (mechanical scrubbers or pressure washing)
- Periodic inspection for wear areas
- Recoating after lifecycle completion
Summary
- Epoxy coatings: Best for indoor, heavy-duty, high-strength requirements.
- PU coatings: Best for outdoor, UV-exposed, flexible, and waterproofing needs.
Most modern car parks use a combined system (Epoxy base + PU topcoat) for maximum strength and weather resistance.