Water Spot Resistant Epoxy Curing Agent DH-3239 Hardener DH-3239 prevents the unsightly water spots and hazy patches that appear when conventional amine hardeners cure in humid conditions. The modified formulation reacts fully and evenly, so floors keep a uniform glossy appearance. It is a practical choice for coastal regions and high-humidity production facilities. Product Specifications Property Unit Value Model - DH-3239 Color - Gardner color; ≤2 Appearance - Colorless