HL55-3 Epoxy bitumen cooling tower damp-proof coating (primer/topcoat)

Overview
Two-component epoxy bitumen damp-proof coating system for cooling tower inner walls.​
Provides impermeability, waterproofing, mildew resistance, corrosion resistance, and heat resistance.​

Composition
Formulated with epoxy resin, bitumen, lamellar fillers, solvents, and additives.​
Cured with modified amine; supplied in Part A & Part B packs.​

Typical uses
Protection of cooling tower inner walls, and waterproof/anti-corrosion for sewage tanks and underground mines.​

Technical data (typical)

• Appearance: Primer—red-brown; topcoat—black.​

• Theoretical consumption: 0.17 kg/m² at 60 μm DFT (excluding loss).​

• Density: 1.3 kg/L.​

• Drying time (25°C): Surface dry 1 h; hard dry 24 h; fully cured 7 d.​

Application data (25°C)

• Mixing ratio (Part A:Part B): 25:2.5.​

• Induction time: 5 min.​

• Pot life: 4 h.​

• Application methods: Airless spray, brush, roller.​

• Thinner: X-7 epoxy thinner; dilution 3–7%.​

• Recoat interval (25°C): Min 12 h; max unlimited.​

• Recommended coats / DFT: 1 coat 40–60 μm; brush/roller 1 coat 30–40 μm.​

Surface preparation
Steel: blast/shot blast to Sa 2.5 or power-tool cleaning to St 3; surface profile 30–75 μm.​
Concrete: must be sound and dry (moisture content ≤6%), free of contamination; repair defects and wash/de-alkalize, dry, then apply after a sealing primer.​

System compatibility / packing / storage

• Packing: Part A 25 kg; Part B 2.5 kg.​

• Storage: Shelf life 12 months; store dry/cool/ventilated, away from fire and direct sunlight; no outdoor stacking.