Körapop 250

Identification & Functionality

Chemical Family

Silanes

Product Type

1K (1 component) Adhesive,

1K (1 component) Sealant,

Reactive Adhesive,

Reactive Sealant

Technologies

Adhesives & Sealants

Product Families

Adhesives & Sealants — Bonding Technology

1K Liquid Reactive Adhesives

Adhesives & Sealants — Sealing Technology

Reactive Sealants

Features & Benefits

Ready-to-Use Product 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

Applications & Uses

Markets

Building & Construction,

Industrial

Applications

Building & Construction — Building Materials

Construction Adhesives

Industrial — Chemical & Industrial Manufacturing

Equipment & Parts

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

Cure Method

Moisture Cure

Application Information

Applications	Fields of Application	Automotive
		Construction
		Industrial assembly
		Transportation
Processing	Suitable Substrates	Various galvanized steels
		Various aluminum alloys
		Various steel alloys
		Duroplastics
		Thermoplastics (except PE, PP, PTFE)
		Various composite materials (e.g. CFRP, GFRP)
		Glass
		Mineralic materials
		Wood
		Coated surfaces
	Consistency	Non-sagging Pasty
	Surface Requirements	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 83
	Application Method	Cartridge dispenser
	Product Overpaintability	No
	Product is free of	Solvents
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. 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.

Preparation

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

Processing

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.

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

Paste

Physical Properties

	Value	Units	Test Method / Conditions
Density	1.3	g/cm³	—
Solid Content	100.0	wt %	—
Specific Volume Resistance	8 x 10⁶	Ω.cm	Kö-test method 100262

Cured Properties

	Value	Units	Test Method / Conditions
Skin Formation Time	10.0	min	Kö-test method 100109, Climate according to DIN 50014
Curing to Depth (within first 24 h)	3.0	mm/d	Climate according to DIN 50014
Hardness (after 28d, thickness of specimen = 6 mm)	56.0	—	DIN ISO 7619-1, Shore A
Tensile Strength	4.7	MPa	DIN EN ISO 527
Elongation at Break	350.0	%	DIN EN ISO 527
Lap Shear Strength (substrates: aluminum/aluminum)	3.9	MPa	DIN EN 1465
Tear Strength	23.0	N/mm	ASTM D624

Processing Parameters

	Value	Units	Test Method / Conditions
Processing Temperature	5 - 35	°C	—
Required Squeezing Pressure	4 - 5	bar	—
Recommended Minimum Layer Thickness	2.0	mm	—

Recommended Operating Conditions

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

Packaging & Availability

Country Availability

Germany

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.