Körapur® 125

Identification

Chemical Family

Polyurethanes (PU),

Urethanes

GBU

EA

RTU Product Type

1K (1 component) Sealant,

1K (1 component) Adhesive,

Reactive Sealant,

Reactive Adhesive

Categories

Markets → Automotive & Transportation → Applications → Transportation → Commercial

Markets → Automotive & Transportation → Applications → Transportation → Off Road & Recreational Vehicle (RV)

Markets → Building & Construction → Applications → Building Materials → Construction Adhesives

Markets → Consumer Goods → Applications → Appliances & Electronics

Technologies → Adhesives & Sealants → Product Families → Bonding Technology → 1K Liquid Reactive Adhesives

Technologies → Adhesives & Sealants → Product Families → Sealing Technology → Reactive Sealants

Application Information

Cure Method

Moisture Cure

Applications

Application Area

Appliances,

Truck,

Recreational Vehicles,

Bus,

Panel Lamination

Application Method

Cartridge Dispenser,

Sachet Dispenser

Compatible Substrates & Surfaces

Glass,

Metal,

Plastics,

Wood,

Aluminum,

Steel,

Galvanized Steel,

Coated Surfaces,

Painted Surfaces,

Aluminum Alloys,

Carbon Fiber Reinforced Plastics (CFRP),

Alloy Steel,

Glass Fibre Reinforced Polymer (GFRP)

Applications & Uses

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.

Features

Ready-to-Use Product Features

Excellent Elasticity,

Excellent Humidity Resistance,

Excellent Moisture Resistance,

Excellent Strength,

Excellent Substrate Adhesion,

Good Adhesion,

Good Sagging Resistance,

Good Weather Stability,

Heat Resistance,

High Elongation,

Paintable,

Good Cold Resistance

Packaging & Availability

Country Availability

Australia,

Canada,

Switzerland,

China (Mainland),

Japan,

Korea,

Malaysia,

New Zealand,

Philippines,

Turkey,

Taiwan,

USA

Regional Availability

• Asia Pacific
• Europe
• North America
• Latin America
• India/MiddleEast/Africa (IMEA)

Physical Properties

Physical Form

Paste

Properties

Density:

1200 kg/m³

Solid Content:

94 %

Specific Gravity:

1.2

Strain at Break:

500 %

Tear Strength:

9 kN/m

Tensile Strength:

2 MPa

Physical Properties

	Value	Units	Test Method / Conditions
Density	1.2	g/cm³	-
Glass Transition Temperature	-45.0	°C	DIN EN ISO 6721-1
Solid Content	94.0	wt %	-
Specific Volume Resistance	min. 1 x 10¹⁰	Ω.cm	Kö-test method 100262

Cured Properties

	Value	Units	Test Method / Conditions
Change in Volume	-6.0	%	DIN EN ISO 10563
Curing to Depth (within first 24 hours)	3	mm/d	Climate according to DIN 50014
Elongation at Break	500.0	%	DIN EN ISO 527
G10-Modulus	1.1	MPa	DIN EN 1465
Hardness (after 28d, thickness of specimen = 6 mm)	48	Shore A	DIN ISO 7619-1
Lap Shear Strength (substrates: aluminum/aluminum)	1.8	MPa	DIN EN 1465
Skin Formation Time	45.0	min	Kö-test method 100109, Climate according to DIN 50014
Tear Strength	9.0	N/mm	ISO 34-1
Tensile Strength	2.0	MPa	DIN EN ISO 527
Young’s Modulus (at 100% elongation)	1.0	MPa	DIN EN ISO 527 / DIN 53 504

Recommended Operating Conditions

	Value	Units	Test Method / Conditions
Service Temperature	- 60 - 90	°C	-
Short-Term Temperature Resistance (60 min)	120.0	°C	-

Processing Parameters

	Value	Units	Test Method / Conditions
Processing Temperature	15 - 35	°C	-
Recommended Minimum Layer Thickness	2.0	mm	-
Required Squeezing Pressure	2 - 5	bar	-
Storage Temperature	5 - 25	°C	-

Typical Properties

	Value	Units	Test Method / Conditions
Elongation at Tear	500	%	-

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.