GB 45671-2025 English PDF - Building Waterproof Coating Standard

Standard Catalog

The standard consists of the following main sections:

• Foreword

• 1 Scope

• 2 Normative References

• 3 Terms and Definitions

• 3.1 Flexible Waterproof Coating

• 3.2 Waterborne Waterproof Coating

• 3.3 Polymer Emulsion Waterproof Coating

• 3.4 Waterborne Polymer Asphalt Waterproof Coating

• 3.5 Reactive Polymer Waterproof Coating

• 3.6 Solvent-borne Waterproof Coating

• 3.7 Hot Melt Waterproof Coating

• 3.8 Cement-based Waterproof Material

• 4 Technical Requirements

• 4.1 Combustion Performance

• 4.2 Flash Point

• 4.3 Limit of Harmful Substances

• 4.3.1 Limits of Harmful Substances in Waterborne Waterproof Coatings

• 4.3.2 Limits of Harmful Substances in Reactive Polymer Waterproof Coatings

• 4.3.3 Limit of Harmful Substances in Solvent-borne Waterproof Coatings

• 4.3.4 Limit of Harmful Substances in Hot-melt Applied Waterproof Coatings

• 4.3.5 Limit of Harmful Substances in Powder-type Waterproof Materials

• 4.4 Material Engineering Requirements

• 4.4.1 Flexible Waterproof Coating Engineering Requirements

• 4.4.2 Cement-based Waterproof Material Engineering Requirements

• 5 Test Methods

• 5.1 Standard Test Conditions

• 5.2 Sample Preparation and Curing

• 5.2.1 Flexible Waterproof Coatings

• 5.2.2 Cement-based Waterproof Materials

• 5.3 Combustion Performance

• 5.4 Flash Point

• 5.5 Limit of Harmful Substances

• 5.5.1 Volatile Organic Compounds (VOC) Content

• 5.5.2 Formaldehyde Content

• 5.5.3 Ammonia Content

• 5.5.4 Benzene, Toluene, Ethylbenzene and Xylene Content

• 5.5.5 Phenol Content

• 5.5.6 Anthracene and Naphthalene Content

• 5.5.7 Free Diisocyanates (Free TDI) Content

• 5.5.8 Short-chain Chlorinated Paraffins (C₁₀~C₁₃) Content

• 5.5.9 Total Lead (Pb) Content

• 5.5.10 Content of Soluble Heavy Metals

• 5.6 Low-temperature Performance After Thermal Aging

• 5.7 Artificial Weathering Accelerated Aging

• 5.8 Water Resistance

• 5.8.1 Appearance

• 5.8.2 Retention Rate of Bond Strength with Base Layer After Immersion

• 5.9 Root Resistance Performance

• 5.9.1 Test Specimen Preparation

• 5.9.2 Planting Test

• 5.9.3 Test Completion and Recording

• 5.9.4 Test Report

• 5.10 Impermeability of Mortar Test Specimens

• 5.11 Bond Strength

• 5.11.1 Polymer Cement Waterproof Mortar

• 5.11.2 Polymer Cement Waterproof Slurry

• 5.12 Freeze-thaw Resistance

• 5.13 Water Absorption Rate