Körapop 250 is a one-component elastic adhesive and sealant that utilizes silane-modified polymer chemistry. This product is characterized by its very high strength and non-sag properties, making it ideal for a wide range of applications. It offers high flexibility and provides high adhesion to many substrates without requiring primers. Additionally, Körapop 250 boasts exceptional resistance to UV, weather, and aging.

Chemical Family: Silanes

Product Type: 1K (1 component) Adhesive, 1K (1 component) Sealant, Reactive Adhesive, Reactive Sealant

Application Area: HVAC Applications, Metalworking Equipment, Travel Trailers

Application Method: Cartridge Dispenser

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

Features: Excellent Elasticity, Excellent Moisture Resistance, Excellent Strength, Exceptional UV Resistance, Good Cold Resistance, Good Flexibility, Good Sagging Resistance, Good Weather Stability, Heat Resistance, High Flexibility, Improved Ageing Resistance, Paintable, UV Resistant

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Features & Benefits

Applications & Uses

Application Area
Application Method
Compatible Substrates & Surfaces
Cure Method
Application Information


Fields of Application


Industrial assembly



Suitable Substrates

Various galvanized steels


Various aluminum alloys

Various steel alloys


Thermoplastics (except PE, PP, PTFE)

Various composite materials (e.g. CFRP, GFRP)


Mineralic materials

Coated surfaces

Non-sagging Pasty

Surface Requirements

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 83

Application Method

Cartridge dispenser

Product Overpaintability No
Product is free of Solvents


Cleaner for Tools

Körasolv GL
Körasolv PU


Resistance against UV Radiation

Not suitable for glass bonding with
permanent UV radiation to the bonding area.
Please ask your local sales office for
products suitable for such applications

Stress Cracking

Preliminary tests must be carried out on
plastics with a tendency to stress cracking.

Compatibility with Polystyrene Foams

Not suitable for bonding polystyrene foams.
Please ask your local sales office for
products suitable for such applications.


For some substrates the use of mechanical pretreatment and/or cleaner or primer is necessary to achieve good adhesion.


Low temperatures can cause a temporary increase in viscosity resulting in reduced extrusion and slower curing rates.

Cleaning Instructions

Clean tools immediately after use. Once cured, the material can only be removed mechanically. Appropriate cleaners are listed in the product properties.


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.


Physical Form
Physical Properties
ValueUnitsTest Method / Conditions
Solid Content100.0wt %-
Specific Volume Resistance8 x 10⁶Ω.cmKö-test method 100262
Cured Properties
ValueUnitsTest Method / Conditions
Skin Formation Time10.0minKö-test method 100109, Climate according to DIN 50014
Curing to Depth (within first 24 h)3.0mm/dClimate according to DIN 50014
Hardness (after 28d, thickness of specimen = 6 mm)56.0-DIN ISO 7619-1, Shore A
Tensile Strength4.7MPaDIN EN ISO 527
Elongation at Break350.0%DIN EN ISO 527
Lap Shear Strength (substrates: aluminum/aluminum)3.9MPaDIN EN 1465
Tear Strength23.0N/mmASTM D624
Processing Parameters
ValueUnitsTest Method / Conditions
Processing Temperature5 - 35°C
Required Squeezing Pressure4 - 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

Country Availability
Regional Availability
  • North America

Storage & Handling

Storage Conditions

Körapop 250 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.