Körapur® 928 Marine

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 → Transportation → Marine

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

Marine Applications,

Bedding Compound

Application Method

Gun

Compatible Substrates & Surfaces

Plastics,

Wood,

Galvanized Steel,

Coated Surfaces,

Alloy Steel

Applications & Uses

Processing

Processing temperature: +5°C to +35°C

Preparation:

• The surfaces to be bonded must be clean, dry and free from dust and grease. For cleaning we recommend Körasolv PU. In the case of powder coated substrates, Körasolv WL should be used.
• To increase bond strength of non-porous substrates such as glass, glass-fiber reinforced plastics, gel coat, aluminum, stainless steel, etc. we recommend the use of Körabond HG 81. For porous substrates such as wood, Körabond HG 74 E is recommended. For certain plastics such as ABS or PVC we suggest the use of Körabond HG 77.
• Due to the diversity of substrates, preliminary tests are necessary.

Bonding:

The thickness of the layer depends on the expected mechanical movement. Join the materials to be bonded within the skin formation time. We recommend mechanical fixing until a complete cure is obtained. The curing time depends on temperature, humidity and the dimensions of the joint. When necessary, the curing can be improved by water spraying. This may be required in winter.

Cleaning:

To remove uncured adhesive, use Körasolv PU. Cured adhesive can only be removed mechanically.

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. For further information please contact your local sales office.

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

Cold Resistance,

Excellent Elasticity,

Excellent Humidity Resistance,

Excellent Moisture Resistance,

Excellent Strength,

Exceptional UV Resistance,

Good Sagging Resistance,

Good Weather Stability,

Heat Resistance,

High Elongation,

Paintable,

Temperature Resistance,

Weather Resistance

Features & Benefits

Product Benefits

• Bedding compound for teak decks
• Overpaintable after curing
• Good resistance to humidity and weathering
• Extensive bonding of teak decking
• Resistant to temperature from -40°C to +90°C (for short intervals up to +120°C)
• Meets the requirements of the International Maritime Organization
• Excellent moisture resistance
• Excellent weather resistance
• High cold resistance
• High heat resistance

Product Features

• Excellent moisture resistance
• Excellent weather resistance
• High cold resistance
• High heat resistance

Packaging & Availability

Packaging Type

Sausages

Regional Availability

• North America

Packaging Information

• 600 ml sausage (carton a 12 pcs.)
• 12 kg tin

Properties

Density:

1300 kg/m³

Specific Gravity:

1.3

Tensile Strength:

3 MPa

Technical Data

	Value	Units	Test Method / Conditions
Density	1.3	g/cm³	-
Hardness	45.0	Shore A	DIN 53 505
Processing Temperature	5 - 35	°C	-
Skin Formation Time	75.0	min	Kö-test method 100109
Tensile Strength	3.0	N/mm²	DIN 53 504

Processing Properties

	Value	Units	Test Method / Conditions
Curing to Depth (within first 24 h)	3	mm/day	DIN 50014
Elongation at Break	800	%	DIN EN ISO 527
Hardness (after 28 d, specimen thickness = 6 mm)	45	Shore A	DIN ISO 7619-1
Minimum Layer Thickness	2	mm	-
Processing Temperature	15 - 35	°C	-
Service Temperature	- 40 to 90	°C	-
Short Term Temperature Resistance (60 min)	120	°C	-
Skin Formation Time	75	min	Kö-test method 100109
Squeezing Pressure	2 - 5	bar	-
Tensile Strength	3	mPa	DIN EN ISO 527

Cured Properties

	Value	Units	Test Method / Conditions
Change in Volume	- 5.5	%	DIN EN ISO 10563
Elongation at Break	800	%	DIN EN ISO 527
Hardness (after 28 d, specimen thickness = 6 mm)	45	Shore A	DIN ISO 7619-1
Tear Strength	8	N/mm	DIN ISO 34-1 Type B
Tensile Strength	3	mPa	DIN EN ISO 527

Typical Properties

	Value	Units	Test Method / Conditions
Density	1.3	g/cm³	-
Storage Temperature	5 - 25	°C	-

Regulatory & Compliance

Certifications & Compliance

International Maritime Organization (IMO) Compliant

Safety & Health

Precautions

• When using Körapur 928 Marine, avoid direct skin contact of the uncured material.
• Wear suitable personal protective equipment (chemical resistant gloves/clothing).
• Users should always refer to the Central Association of the Mutual Industrial Accident Insurance Funds, Central Office for Accident Prevention, when processing PUR-coating materials.

Storage & Handling

Storage Condition

Do not store at temperatures above 25°C.

Storage Information

Körapur® 928 Marine should be used within the shelf life specified on the packaging. The storage stability applies to material stored under appropriate conditions only (original unopened containers, recommended storage temperature).

Shelf Life

12 months (sausages), 9 months (tins)

Technical Details & Test Data

Processing Information

Suitable Substrates	Various galvanized steels Various aluminium alloys Various steel alloys Duroplastics Wood Coated surfaces
Consistency	Pasty Non-sagging
Surface Requirements	Dry Clean Free of grease
Surface Cleaning	Körasolv® PU Körasolv® WL
Adhesion Promoter (absorbing surface)	Korabond" HG 92
Adhesion Promoter (non absorbing surface)	Korabond HG 81
Application Method	With spatula
Application Equipment	Cartridge dispenser 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

 

Processing Information

Suitable Substrates	Various galvanized steels
	Various aluminium alloys
	Various steel alloys
	Duroplastics
	Wood
	Coated surfaces
Consistency	Pasty
	Non-sagging
Surface Requirements	Dry
	Clean
	Free of grease
Surface Cleaning	Körasolv® PU
	Körasolv® WL
Adhesion Promoter (absorbing surface)	Körabond HG 92
Adhesion Promoter (non absorbing surface)	Körabond® HG 81
Application Method	With spatula
Application Equipment	Cartridge dispenser
	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.