Heavy-Duty Solvent-Free Epoxy Coal Tar Anticorrosive Coating for Concrete & PCCP Protection

Product Item : 725-H53-105
Category： Industrial Coatings
725-H53-105 is a solvent-free epoxy coal tar coating designed for heavy-duty corrosion protection of PCCP and concrete pipelines. With ultra-high solids content and strong adhesion, it forms a dense, durable barrier against water, chemicals, and soil corrosion. Ideal for long-term protection in demanding infrastructure and water transmission systems.
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Product Overview

725-H53-105 is a two-component, solvent-free epoxy coal tar anticorrosive coating developed for demanding infrastructure environments where long-term protection is critical.

Unlike conventional epoxy coatings, this formulation combines high-build epoxy resin with coal tar technology, creating a dense, impermeable barrier against water ingress, aggressive chemicals, and soil corrosion.

With a VOC content below 50 g/L and volume solids above 95%, it is particularly suitable for projects requiring both environmental compliance and extended service life.

This product has been widely applied in prestressed concrete cylinder pipes (PCCP) and large-scale water conveyance systems, where coating failure is not an option.

Key Advantages

1:Exceptional Corrosion Resistance

Designed for harsh underground and water immersion conditions.

2:Ultra-High Solid Content (≥95%)

Minimizes shrinkage and ensures thick, durable film formation in fewer coats.

3:Solvent-Free & Low VOC

Meets increasingly strict environmental and safety standards.

4:Strong Adhesion to Concrete Substrates

Maintains long-term bonding even under moisture exposure.

5:High Film Build (Up to 1100 μm)

Reduces application cycles and labor costs.

6:Reliable Chemical & Water Resistance

Suitable for sewage, industrial water, and marine-adjacent environments.

Typical Applications

This coating is engineered for heavy-duty infrastructure protection, including:

1:PCCP (Prestressed Concrete Cylinder Pipe) internal & external protection

2:Concrete pipelines and water transmission systems

3:Sewage and wastewater treatment facilities

4:Underground concrete structures

5:Industrial foundations exposed to aggressive environments

Technical Data (Simplified for Engineers)

Volume Solids:≥95% ±2%

VOC:< 50 g/L

Finish:Gloss

Mix Ratio:1:1 (volume/weight)

Dry Film Thickness:200 – 1100 μm

Theoretical Coverage:0.86 – 4.7 m²/L

Flash Point:> 31°C

Application Guidelines

To achieve optimal performance, proper application is essential.

Recommended Method

Airless Spray (Preferred)

1:Preheat: 40–70°C

2:Pressure: ≥22 MPa

3:Nozzle: 0.53–0.89 mm

Brush or roller may be used only for small or repair areas.

Drying & Curing Performance

Temperature	-5℃	5℃	25℃	35℃
Touch Dry	6h	4h	2h	1.5 h
Hard Dry	24h	20h	8h	6h
Pot Life	2h	1h	30min	20min

Fast curing enables efficient project turnaround even in variable climates.

Surface Preparation (Critical for Performance)

For PCCP and concrete substrates:

1:Moisture content: 6% – 9%

2:Surface must be clean, dust-free, and properly cured

3:Remove oil, grease, laitance, and contaminants

4:Mechanical abrasion recommended for optimal adhesion

A well-prepared surface directly determines coating lifespan.

System Compatibility

This coating can be integrated into various heavy-duty anticorrosion systems.

For specific system design (multi-layer or special environments), consultation is recommended.

Limitations & Notes

1:Apply when substrate temperature is ≥3°C above dew point

2:Avoid application when humidity exceeds 85%

3:Epoxy systems may exhibit chalking under UV exposure

4:Not recommended for prolonged direct sunlight without Topcoat

Packaging & Storage

1:Part A: 27 kg / 18 L

2:Part B: 27 kg / 18 L

Shelf life: Minimum 12 months at 25°C

Store in a cool, dry, well-ventilated environment away from heat and ignition sources.

Why This Coating Stands Out

In real-world pipeline and infrastructure projects, coating failure often comes from:

1:Poor adhesion to damp concrete

2:Insufficient film thickness

3:Chemical penetration over time

725-H53-105 addresses these issues by combining:

1:high-build capability

2:low permeability structure

3:field-proven durability in PCCP systems

This makes it a practical engineering solution, not just a lab-formulated product.

FAQ
Q1: Is this coating suitable for underground pipelines?
Yes, it is specifically designed for underground and high-moisture environments.
Q2: Can it be used for PCCP pipes?
Yes, it is widely applied in PCCP internal and external protection systems.
Q3: What is the typical service life?
With proper application, it can provide long-term protection in harsh conditions.