ICS 91.100.50
CCS Q24
National Standard of the People's Republic of China
GB/T 24498-2025
Replaces GB/T 24498-2009
Gaskets for doors, windows and curtain walls of buildings
建筑門窗、幕墻用密封膠條
(English translation)
Issue date: 2025-01-24 Implementation date: 2025-08-01
Issued by the State Administration for Market Regulation of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword i
1 Scope 1
2 Normative references 1
3 Terms and definitions 2
4 Classification, code and designation 3
5 Technical requirements 4
6 Test methods 11
7 Inspection rules 19
8 Marking, packaging, transport and storage 23
Foreword
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.
This document replaces GB/T 24498-2009 Gaskets for doors, windows and curtain walls of buildings. In addition to structural adjustments and editorial changes, the following main technical changes have been made with respect to GB/T 24498-2009:
——Terms and definitions for gaskets (see 3.1), compression force (see 3.6), and complex weatherstrip (see 3.7) are added;
——Terms and definitions for free height (see 3.2 hereof; and 3.1 of Edition 2009), deflection recovery (see 3.3 hereof; and 3.2 of Edition 2009), working range (see 3.4 hereof; and 3.3 of Edition 2009), and tensile recovery (see 3.5 hereof; and 3.4 of Edition 2009) are changed;
——The Clause “Classification, code and designation” are changed (see Clause 4 hereof; and Clause 4 of Edition 2009);
——Requirements for material properties of vulcanized rubber gaskets are changed (see Tables 3 and 4 hereof; and Table 2 of Edition 2009);
——Requirements for material tear strength are added (see Tables 3–6 hereof);
——Requirements for properties of sponge rubber materials are added (see Table 5 hereof);
——Requirements for material properties of thermoplastic elastomer (TPE) gaskets (see Table 6 hereof; and Table 3 of Edition 2009);
——Requirements for properties of flame-retardant materials are added (see Table 7 hereof);
——Requirements for properties of hydrophilic expansion materials contained in hydrophilic expansion complex weatherstrips are added (see Table 8 hereof);
——Requirements for properties of sponge weatherstrips with coating are added (see Table 9 hereof);
——Requirements for mass loss on heating of materials are deleted (see Tables 2 and 3 of Edition 2009);
——Deflection recovery grading after thermal aging of material is deleted (see Tables 2 and 3 of Edition 2009);
——Requirements are added for product density (see 5.4.1 hereof), mass loss rate on heating (see 5.4.4 hereof), peeling resistance (see 5.4.8 hereof), friction coefficient (see 5.4.9 hereof), brittleness temperature (see 5.4.10 hereof), repeated water absorbency (see 5.4.11 hereof), high- and low-temperature resistance (see 5.4.12 hereof), fatigue resistance (see 5.4.13 hereof), compression force (see 5.4.14 hereof), and limit of harmful substances (see 5.4.15 hereof);
——Tear strength test methods are added (see 6.2.3 hereof);
——The test methods for compression set are changed (see 6.2.4 hereof; and 6.4.2 of Edition 2009);
——Test methods are added for oxygen index (see 6.2.8 hereof), vertical burning behaviour (see 6.2.9 hereof), smoke density (see 6.2.10 hereof), and hydrophilic expansion (see 6.2.11 hereof);
——Test methods are added for product density (see 6.5.1 hereof), mass loss rate on heating (see 6.5.4 hereof), peeling resistance (see 6.5.8 hereof), friction coefficient (see 6.5.9 hereof), brittleness temperature (see 6.5.10 hereof), repeated water absorbency (see 6.5.11 hereof), high- and low-temperature resistance (see 6.5.12 hereof), fatigue resistance (see 6.5.13 hereof), compression force (see 6.5.14 hereof), and limit of harmful substances (see 6.5.15 hereof).
Attention is drawn to the possibility that some content of this document may involve patents. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This document was proposed by the Ministry of Housing and Urban-Rural Development of the People's Republic of China (MOHURD).
This document is under the jurisdiction of the National Technical Committee 448 on Curtain Walls and Windows of Standardization Administration of China (SAC/TC 448).
This document was issued in 2009 as first edition; and this edition is the first revision.
Gaskets for doors, windows and curtain walls of buildings
1 Scope
This document specifies the classification, code and designation, technical requirements, test methods, inspection rules, and marking, packaging, transport and storage of gaskets for doors, windows and curtain walls of buildings.
This document is applicable to the design, production and inspection of gaskets for doors, windows and curtain walls of buildings.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 250 Textiles - Tests for colour fastness - Grey scale for assessing change in colour
GB/T 528-2009 Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties
GB/T 529-2008 Rubber vulcanized or thermoplastic - Determination of tear strength (Trouser, angle and crescent test pieces)
GB/T 531.1 Rubber vulcanized or thermoplastic - Determination of indentation hardness - Part 1: Durometer method (Shore hardness)
GB/T 533-2008 Rubber, vulcanized or thermoplastic - Determination of density
GB/T 1682 Rubber, vulcanized - Determination of low-temperature brittleness - Single test piece method
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 3512 Rubber, vulcanized or thermoplastic - Accelerated ageing and heat resistance tests - Air-oven method
GB/T 3672.1-2002 Rubber - Tolerances of products - Part 1: Dimensional tolerances
GB/T 3672.2-2002 Rubber - Tolerances of products - Part 2: Geometrical tolerances
GB/T 6343 Cellular plastics and rubbers - Determination of apparent density
GB/T 7759.1-2015 Rubber, vulcanized or thermoplastic -- Determination of compression set -- Part 1: At ambient or elevated temperatures
GB/T 7762 Rubber, vulcanized or thermoplastic - Resistance to ozone cracking - Static strain testing
GB/T 8627 Test method for density of smoke from the burning or decomposition of building materials
GB/T 9881-2008 Rubber - Vocabulary
GB/T 10707 Rubber - Determination of the burning behaviour
GB/T 16422.2-2022 Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps
GB 16776-2005 Structural silicon sealants for building
GB/T 18173.3-2014 Polymer water-proof materials - Part 3: Hydrophilic expansion rubber
GB/T 20739 Rubber products - Guidelines for storage
GB/T 21282-2007 Rubber/plastics weatherstrip for automobile
QC/T 941-2013 Test methods of mercury in automobiles materials
QC/T 942-2021 Test methods of hexavalent chromium in automotive materials
QC/T 943-2013 Test methods of lead and cadmium in automobiles materials
QC/T 944-2013 The methods of polybrominated biphenyls andpolybrominated diphenyl ethers in automotive materials
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 9881-2008 and the following apply.
3.1
gaskets
sealing components serving a sealing function, installed in the opening or fixed parts of the doors, windows and curtain walls
Note: Single-material gaskets and complex weatherstrip are included.
3.2
free height
maximum dimension of the external contour of the gasket along the sealing direction in its free state under standard test conditions
3.3
deflection recovery
ability of the gasket to recover its free height after being compressed along the sealing direction
3.4
working range
dimension to which the gasket is compressed under normal working conditions
3.5
tensile recovery
ability of the gasket to recover its initial length after being stretched along the length direction
3.6
compression force
force applied to compress the gasket to its working range
3.7
complex weatherstrip
weatherstrip that is formed by composite molding of polymer materials with different physical properties
4 Classification, code and designation
4.1 Classification and code
4.1.1 Material categories
The gaskets are divided into single-material gaskets and complex weatherstrips by material. The categories and codes of commonly used single-material gaskets are shown in Table 1, and those of complex weatherstrips are shown in Table 2.
Table 1 Categories and codes of commonly used single-material gaskets
Vulcanized rubber materials Thermoplastic elastomer (TPE) materials
Category of gasket body material Code Category of gasket body material Code
Ethylene propylene diene monomer rubber EPDM Themoplastic vulcanizate TPV
Silicone rubber MVQ Styrenic thermoplastic elastomer TPS
The properties of plasticized polyvinyl chloride (PPVC) material shall comply with the requirements for properties of TPE materials.
Note: For those with flame retardant function, add Z after the designation.
Table 2 Categories and codes of complex weatherstrips
Category Code Category Code
Sponge complex weatherstrips FH-HM Complex weatherstrips with cord FH-JX
Sponge weatherstrips with coating FH-BF Different hardness complex weatherstrips FH-RY
Hydrophilic expansion complex weatherstrips FH-PZ Low-friction complex weatherstrips FH-DMC
4.1.2 Product density
The product density code is the numerical value of its nominal density [unit: grams per cubic centimeter (g/cm3)].
4.2 Designation
The designation consists of "Gaskets for doors, windows and curtain walls of buildings", the number of this document (GB/T 24498), material category code and product density code.
Gaskets for doors, windows and curtain walls
of buildings GB/T 24498
Example 1: Vulcanized rubber EPDM solid gaskets with a product density of 1.27 g/cm3 are designated as:
Gaskets for doors, windows and curtain walls of buildings GB/T 24498 EPDM-1.27
Example 2: Complex weatherstrips with cord with a product density of 1.27 g/cm3 are designated as:
Gaskets for doors, windows and curtain walls of buildings GB/T 24498 FH-JX-1.27
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification, code and designation
5 Technical requirements
6 Test methods
7 Inspection rules
8 Marking, packaging, transport and storage
