Körapur® 125 is a multi-purpose, one-component, non-sag, elastic polyurethane adhesive and sealant. It has good resistance to humidity and weathering and is both paintable and suitable for use with foodstuffs. Additionally, it exhibits good adhesion to a wide range of substrates.

Chemical FamilyPolyurethanes (PU), Urethanes

Product Type1K (1 component) Adhesive, 1K (1 component) Sealant, Reactive Adhesive, Reactive Sealant

Application AreaAppliances, Bus, Panel Lamination, Recreational Vehicles, Truck

Application MethodCartridge Dispenser, Sachet Dispenser

Compatible Substrates & SurfacesAluminum, Aluminum Alloys, Glass, Metal, Painted Surfaces, Plastics, Steel, Wood

FeaturesExcellent Elasticity, Excellent Humidity Resistance, Excellent Moisture Resistance, Excellent Strength, Excellent Substrate Adhesion, Good Adhesion, Good Cold Resistance, Good Sagging Resistance, Good Weather Stability, Heat Resistance, High Elongation, Paintable

Technical Data Sheet

Enhanced TDS

Identification & Functionality

Features & Benefits

Applications & Uses

Cure Method
Processing

Processing

Consistency

Non-sagging
Pasty

Surface requirements

Dry
Clean
free of grease

Surface cleaning

Körasolv GL
Körasolv PU
Körasolv WL
Adhesion promoter (absorbing surface)

Körabond HG 74 E

Adhesion promoter (non absorbing surface)

Körabond HG 81

Product overpaintability

after skin formation (depending on paint)

Cleaning

Cleaner for tools

Körasolv GL
Körasolv PU

Hints

Resistance against UV radiation

Not suitable for glass bonding with permanent UV radiation to the bonding area.

Stress cracking

Preliminary tests must be carried out on plastics with a tendency to stress cracking. (PMMA, ABS, PC or PS)

Compatibility with polystyrene foams

Not suitable for bonding polystyrene foams.

Avoid contact with isocyanate reactive substances

Avoid direct contact with isocyanate reactive substances, especially alcohol such as spirit, dilutions, cleaning compounds and fission products of silane-modified polymers or silicones until the adhesive has attained full cure. This will prevent the adhesive from curing properly.

  • Low temperatures can cause a temporary increase in viscosity resulting in reduced extrusion and slower curing rates.
  • Cleaning: Clean tools immediately after use. Once cured, the material can only be removed mechanically. Appropriate cleaners are listed in the product properties table.
  • Dimensioning: The required thickness of the adhesive layer depends on the expected maximum strength and joint movement. We recommend a minimum layer thickness of 2 mm.

Properties

Physical Form
Physical Properties
ValueUnitsTest Method / Conditions
Density1.2g/cm³
Solid Content94.0wt %
Glass Transition Temperature-45.0°CDIN EN ISO 6721-1
Specific Volume Resistancemin. 1 x 10¹⁰Ω.cmKö-test method 100262
Cured Properties
ValueUnitsTest Method / Conditions
Skin Formation Time45.0minKö-test method 100109, Climate according to DIN 50014
Curing to Depth3.0mm/dwithin first 24 h; Climate according to DIN 50014
Change in Volume-6.0%DIN EN ISO 10563
Hardness (after 28d, thickness of specimen = 6 mm)48.0DIN ISO 7619-1, Shore A
Young’s Modulus (at 100% elongation)1.0MPaDIN EN ISO 527 / DIN 53 504
Tensile Strength2.0MPaDIN EN ISO 527
Elongation at Break500.0%DIN EN ISO 527
G10-Modulus1.1MPaDIN EN 1465
Lap Shear Strength (substrates: aluminum/aluminum)1.8MPaDIN EN 1465
Tear Strength9.0N/mmISO 34-1
Processing Parameters
ValueUnitsTest Method / Conditions
Processing Temperature15 - 35°C
Required Squeezing Pressure2 - 5bar
Recommended Minimum Layer Thickness2.0mm
Recommended Operating Conditions
ValueUnitsTest Method / Conditions
Service Temperature- 60 - 90°C
Short-Term Temperature Resistance (60 min)120.0°C

Packaging & Availability

Regional Availability
  • Africa
  • Asia Pacific (Excluding Russia)
  • Australia
  • Canada
  • China
  • Europe (Excluding Russia)
  • India
  • Japan
  • Korea
  • Latin America
  • Malaysia
  • Middle East
  • North America
  • Philippines
  • USA

Storage & Handling

Storage Condition

Körapur 125 should be used within the shelf life specified on the packaging. The storage stability only applies to material stored in original unopened containers, at storage temperature 5°C to 25°C.