Dachin SF EPOXY-100
Graphene solvent-free wear-resistant and drag reducing coating

Product Overview

A two-component, solvent-free, self-drying, high-build epoxy resin coating with abrasion resistance, composed of epoxy resin, graphene, fillers, and additives.

Key Performance

• Functions as an epoxy intermediate coat for internal/external coating of steel box girder, offering excellent protective and mechanical properties.
• Can be applied using single-component high-pressure airless spray equipment.
• Suitable for potable water tanks and pipeline linings.
• As a primer, primarily used in environments prone to wear and severe corrosion.

Physical Characteristics (at 20°C)

Color	Gray
Gloss	Glossy
Density	1.4–1.6 kg/L
Volume Solids	100%
Theoretical Coverage	5 m²/L (based on 200μm dry film)
Surface Dry	12 hours
Full Cure	7 days
VOC	0 g/L

Application Guide

Application Methods	High-pressure airless spray, brush/roller for small area touch-up and pre-coating
Thinner	Optional
Nozzle Pressure	22 MPa
Nozzle Orifice	0.48–0.64 mm

Pot Life

Usable time after mixing (at suitable application viscosity)

Mix Temperature	Usable Time
15°C	2 hours
20°C	1.5 hours
25°C	1 hour

Recoat Intervals

Recoat intervals for a 200μm dry film thickness

Subsequent Coating	Interval Time	10°C	20°C	30°C	40°C
Self-recoat	Minimum Recoat Interval	40 hours	16 hours	8 hours	5 hours
	Maximum Recoat Interval	70 days	30 days	14 days	7 days

Safety Precautions

• Use with care. Follow safety instructions on packaging.
• Though solvent-free, avoid inhaling spray mist and skin/eye contact with wet paint. Use air-supplied respirators during spraying.
• Ensure adequate ventilation in confined spaces to maintain visibility.
• Adhere to local safety regulations for hazardous materials.

Surface Preparation

Clean with appropriate degreasers, remove oil, grease, and salt residues via high-pressure water washing. Blast to Sa2.5 standard, achieving surface roughness of 40–70μm (equivalent to Rugotest No.3, BN9a, Keane-Tator 2.0G/S, ISO 8503-2:1988, or GB/T 13288.2-2011 Intermediate (G) grade).

Application Conditions

• Use only above 5°C to ensure proper curing.
• Steel surface must be clean, dry, and 3°C above dew point to prevent condensation.
• Provide ample ventilation during application and curing in confined spaces.

Cleaning Solvents

Use general-purpose epoxy thinners. Flush spray equipment immediately after use. Empty residual material within the pot life after mixing.

Notes

Ventilation: Maintain adequate airflow during application and curing. Exothermic reaction may cause temperature rise during mixing and initial curing.

Weathering: Epoxy coatings are prone to discoloration and chalking when exposed outdoors. Avoid mechanical damage and chemical exposure in high-temperature environments.

Stirring: Thoroughly stir base material before mixing with hardener to re-disperse settled particles. Continue stirring during mixing to maintain homogeneity.

Recoat: Recoat intervals depend on environmental exposure. If exceeding maximum interval, scuff-sand surface to ensure adhesion. Clean thoroughly with appropriate cleaners and high-pressure water rinse. Critical for long-interval recoats in contaminated environments.