ISO 14448:2016 PDF

Overview

ISO 14448:2016 - Low modulus adhesives for exterior tile finishing - specifies quality criteria and test methods for low modulus reaction-resin adhesives used to bond tiles to exterior walls. The standard addresses composition, classification, laboratory test conditions and performance requirements (shelf life, adhesive strength, cured‑film properties, heat stability, slip resistance, pot‑life/open‑time and density) to ensure long‑term exterior tile installation performance.

Key topics and technical requirements

• Scope & classification
  • Applies to low modulus adhesives (elastomeric, ≥35% elongation at break) composed of reaction resins (single‑ or multi‑component).
  • Classified by principal chemistry and reaction mode (e.g., polyurethane 1‑component / 2‑component; silyl‑terminated polymers 1‑component / 2‑component).
• Performance thresholds (selected highlights from the standard)
  • Cured adhesive/tensile adhesion strength
    • Standard curing: ≥ 0.60 N/mm² and ≥ 75% cohesive failure ratio.
    • Low temperature, alkaline water immersion, freeze‑thaw, heat aging: ≥ 0.40 N/mm² and ≥ 50% cohesive failure ratio.
  • Cured film properties
    • Tensile strength: ≥ 0.60 N/mm²; elongation at break: ≥ 35%.
    • Cold/hot resistance: performance validated at −20 °C and +80 °C.
  • Heat stability: 4 weeks at 80 °C under 1 kg load - tiles must remain stable.
  • Slip: No downward movement on vertical combed adhesive layers.
  • Shelf life: No gelling, homogeneous; weight change