Körapur® 128 S

Identification

Chemical Family

Polyurethanes (PU)

GBU

EA

RTU Product Type

1K (1 component) Sealant,

1K (1 component) Adhesive,

Reactive Sealant,

Reactive Adhesive

Categories

Markets → Automotive & Transportation → Applications → Automotive → Exterior & Body

Markets → Automotive & Transportation → Applications → Coatings & Finishes → Vehicle Refinish

Markets → Consumer Goods → Applications → Appliances & Electronics

Markets → Industrial → Applications → Chemical & Industrial Manufacturing → Equipment & Parts

Markets → Industrial → Applications → Chemical & Industrial Manufacturing → Industrial Adhesives & Sealants

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

Containers,

Appliances,

HVAC Applications,

Air Conditioning ,

Heating Equipment,

Metal Parts,

Vehicles

Application Method

Sachet Dispenser

Compatible Substrates & Surfaces

Metal,

Plastics,

Wood,

Aluminum,

Steel,

Galvanized Steel,

Coated Surfaces,

Painted Surfaces,

Aluminum Alloys,

Alloy Steel

Applications & Uses

Processing

• Good adhesion to primed and painted metals, aluminum and steel, wood and duroplastics
• Good resistance to humidity and weathering
• Overpaintable after curing
• Resistant to temperatures from -40°C to +90°C (up to +120°C for short intervals)
• Self-leveling
• Can be used with booster Köracur 110 S

Processing Information

Preparation

• For some substrates the use of mechanical pretreatment and/or cleaner or primer is necessary to achieve good adhesion. Refer to the product properties section of this data sheet for special surface requirements and suitable adhesion promoters.

Processing

• Refer to the technical data table regarding processing parameters. 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.

Features

Ready-to-Use Product Features

Cold Resistance,

Excellent Elasticity,

Excellent Humidity Resistance,

Excellent Moisture Resistance,

Excellent Substrate Adhesion,

Good Adhesion,

Good Substrate Wetting,

Good Weather Stability,

Heat Resistance,

High Elongation,

High Flowability,

Paintable,

Temperature Resistance,

Self-Leveling,

Weather Resistance

Features & Benefits

Product Benefits

• Good adhesion to primed and painted metals, aluminium and steel, wood and duroplastics
• Good resistance to humidity and weathering
• Overpaintable after curing
• Resistant to temperatures from -40°C to +90°C (up to +120°C for short intervals)
• Self-levelling
• Can be used with booster Köracur 110 S

Packaging & Availability

Country Availability

Australia,

Canada,

Switzerland,

China (Mainland),

Japan,

Korea,

Malaysia,

New Zealand,

Philippines,

Turkey,

Taiwan,

USA

Packaging Type

Cartridges,

Drums,

Sachets

Regional Availability

• Europe
• North America

Physical Properties

Physical Form

Liquid

Properties

Density:

1200 kg/m³

Specific Gravity:

1.2

Cured Properties

	Value	Units	Test Method / Conditions
Change in Volume	max. - 1	%	DIN EN ISO 10563
Curing to Depth (within first 24 h)	3	mm/day	DIN 50014
Elongation at Break	500	%	DIN EN ISO 527
Hardness (after 28 d, specimen thickness = 6 mm)	40	Shore A	DIN ISO 7619-1
Service Temperature	- 40	°C	-
Skin Formation Time	30	min	Kö-test method 100109
Tear Strength	5	N/mm	DIN ISO 34-1 Type B
Tensile Strength	1.5	mPa	DIN EN ISO 527

Physical Properties

	Value	Units	Test Method / Conditions
Density	1.2	g/cm³	DIN EN ISO 2811-1
Glass Transition Temperature	- 54	°C	DIN EN ISO 6721-1

Processing Properties

	Value	Units	Test Method / Conditions
Processing Temperature	15 - 35	°C	-
Service Temperature	90	°C	-
Short Term Temperature Resistance (60 min)	120	°C	-
Storage Temperature	5 - 25	°C	-

Storage & Handling

Storage Condition

• Do not store at temperatures above +25°C.
• Precautions: When processing Körapur 128 S avoid direct contact with the uncured material. Safety gloves are recommended.

Shelf Life

12 months (cartridges and sachets), 9 months (drums)

Technical Details & Test Data

Processing Information

Suitable Substrates	Painted or powder coated surfaces
	Various galvanized steels
	Various aluminium alloys
	Various steel alloys
	Duroplastics
	Wood
Surface Requirements	Dry
	Clean
	Free of grease
Surface Cleaning	Körasolv PU
	Körasolv® WL
Adhesion Promoter (absorbing surface)	Körabond® HG 74 E
Adhesion Promoter (non absorbing surface)	Körabond HG 81
Application Method	Pouring
Application Equipment	Sachet dispenser
	Dispensing system
Product Overpaintability	After skin formation (depending on paint)

 

• Cleaner for Tools 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. (PMMA, ABS, PC or PS)
• Compatibility with Polystyrene Foams Not suitable for bonding polystyrene foams. Please ask your local sales office for products suitable for such applications.
• Avoid Contact with Isocyanate Reactive Substances Avoid direct contact with isocyanate reactive substances, especially alcohol such as spirit, dilutions, cleaning compounds and reaction or curing products of silane-modified polymers or silicones until the adhesive has attained full cure. This will prevent the adhesive from curing properly.