ISO 5892:2024

Overview

ISO 5892:2024 - "Rubber building gaskets - Materials for preformed solid vulcanized structural gaskets - Specification" defines material and test requirements for preformed, solid vulcanized rubber structural gaskets used to support and seal glazing and other building components. This third edition focuses on material properties, workmanship and test methods for gaskets that both support glass substrates and ensure watertightness and airtightness. (Non‑supporting gasket specifications are covered by ISO 3934.)

Key topics and technical requirements

• Material types: Two material grades are specified:
  • Type E - nominal hardness 75 ± 5 Shore A (for gaskets and lock strips).
  • Type F - nominal hardness 85 ± 5 Shore A (for lock strips only).
• Mechanical properties:
  • Tensile strength: minimum 12 MPa (ISO 37).
  • Elongation at break: ≥ 175% (Type E) and ≥ 125% (Type F).
• Compression set:
  • Maximum 35% after 24 h at 100 °C (ISO 815-1).
  • Low‑temperature compression set: median values after 24 h and 30 min recovery - Type E ≤ 60%, Type F ≤ 70%; test temperature depends on working‑temperature class.
• Working temperature ranges (four classes):
  • T1: −20 °C to +55 °C
  • T2: −20 °C to +85 °C
  • T3: −40 °C to +70 °C
  • T4: −40 °C to +100 °C
• Aging and ozone resistance:
  • Accelerated ageing limits for hardness, tensile strength and elongation per ISO 188:2023 (method A).
  • Ozone resistance: no cracking after 96 h at 40 °C, 20% strain at (500 ± 50) ppb ozone (ISO 1431‑1).
• Workmanship and dimensions: material must be ozone‑resistant (not reliant on removable surface coatings), free from porosity/defects; dimensional tolerances per ISO 3302‑1.
• Optional requirements: high‑ozone resistance (1 000 ± 100 ppb), holding force, watertightness (ISO 15821), flammability, migration staining, low‑temperature brittleness and lifetime estimation (added in this edition).

Applications and users

ISO 5892:2024 is intended for:

• Gasket manufacturers designing and qualifying preformed vulcanized rubber structural profiles.
• Façade and glazing systems engineers, architects and specifiers selecting materials for structural glazing and window/curtain wall seals.
• Testing laboratories conducting compliance tests (hardness, tensile, compression set, ozone, ageing).
• Contractors and building product certification bodies requiring documented material performance for watertightness, durability and service temperature.

Related standards

Key referenced standards for test methods and complementary requirements:

• ISO 37, ISO 48‑4, ISO 188:2023, ISO 815‑1 / 815‑2, ISO 1431‑1, ISO 3302‑1, ISO 3384‑1:2024, ISO 11346, ISO 15821 and ISO 3934.

Keywords: ISO 5892:2024, rubber building gaskets, structural gaskets, vulcanized rubber, Shore A hardness, compression set, ozone resistance, working temperature range, gasket lifetime estimation.