Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Chemical Name
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Features and Benefits
- Primerless application including zinc/galvanized
- Excellent adhesion to dissimilar substrates
- Fast setting and curing
- Non-sag
- High strength, modulus and toughness
- Excellent environmental resistance
- No need for extra materials or processes
- Affords greater flexibility in design
- Speeds up assembly process
- Application on vertical surfaces
- Designed for demanding structural applications
- Designed for demanding environmental applications
- Crestabond® Features
- Primerless adhesives
- Minimal surface preparation
- Excellent fatigue and impact resistance
- Range of working and fixture times
- Good gap filling capability
- Bonds stainless steel, aluminium, powder coated steel, cold rolled steel and galvanised steel
- Customer Benefits
- Dramatically enhances production efficiency and reduces consumable costs
- Reduces dust emissions and preparation time
- Confidence in the longevity of the finished product
- Optimises production cycles to reduce manufacturing costs
- Adhesive can be used in multiple applications
- Provides flexibility in structural designs
Applications & Uses
- Applications
- Compatible Substrates & Surfaces
- Guide to Bonding
Check first
- Product is within shelf life
- Cartridge has been stored correctly
- No obvious defect or damage to cartridge
- No blockages at the cartridge outlet
- Correct static mixing nozzle is being used
Key points
- Higher or lower working temperatures will cause the working time to decrease or increase
- Static mixers must always be discarded after use
- Operating temperature of Crestabond® is from -40°C up to 100°C
- Recommended Applications
- Prior to bonding, ensure the substrate surface is clean by following the surface preparation instructions provided. Bulk dispensing equipment should be in good operating condition.
- Dispense the adhesive at a slow rate initially onto a non-bonding surface until the mixed bead color is uniform. Check the dispensed bead for cure quality before beginning the bonding process.
- Dispense enough adhesive to fill the bond gap before parts are mated. Avoid dry bonds by using adequate pressure to mate parts and clamp properly to prevent joint movement. The working time is the approximate time after mixing that the adhesive is still usable.
- The bonding process must be completed before the working time of the mixed adhesive expires. The viscosities of both adhesive and activator are affected by temperature. The adhesive, activator and parts to be bonded should be allowed to attain workshop temperature of between 18°C and 25°C (64°F and 77°F) prior to bonding.
- The operating temperature should be maintained during the bonding process and until the adhesive is sufficiently cured to allow movement of the assembly. Typically, such movement may be possible after the fixture time of the adhesive is achieved. Ambient temperature, bondline thickness and the substrate materials being bonded can all affect the fixture time.
- For industrial/commercial use only. Not to be used in household applications. The user must determine the suitability of a selected adhesive for a given substrate and application. Contact your local Scott Bader representative for questions or assistance with the selection of adhesives for your use.
- This product is intended for use by skilled individuals at their own risk. Recommendations contained herein are based on information we believe to be reliable.
Properties
- Mechanical Properties
- Typical Properties
- Application Properties
- Viscosity⁶
- 200-450 & 450-1100 dPa.s**
- Note
1. Working time measured with 10g mass of adhesive with 10:1 mix ratio by volume at 24°C (75°F).
2. Fixture time defined using an ISO 4587 lap shear sample, 0.26mm bondline
thickness with 23°C (73°F) ambient temperature achieving >1.4MPa.
3. Tested to ASTM D638.
4. Metals tested according to ISO 4587, Thermoplastics according to ASTM 2564 and GRP according ASTM 5868.
5. Maximum temperature where an ISO 4587 lap shear sample, 0.26mm bondline thickness achieves >3MPa.
6. Viscosity measured using a Brookfield Viscometer at 24°C (75°F)*, Viscosity measured using HAKKE RV1 Rheometer at 25°C (77°F)**
8. Substrate failure when tested.
9. Adhesive failure when tested.
10. Cohesive failure when tested.
11. Surface preparation of epoxy laminates may be necessary and testing should be performed to ensure sufficient bond strength is achieved.
12. Surface preparation is likely to be needed on gelcoat surfaces to ensure no release agents are present.- Substrates
- Primerless adhesives
- Minimal surface preparation
- Excellent fatigue and impact resistance
- Range of working and fixture times
- Good gap filling capability
- Bonds stainless steel, aluminum, powder coated steel, cold rolled steel and galvanized steel
| Value | Units | Test Method / Conditions | |
| Tensile Strength³ | 22 - 25 | MPa | — |
| Tensile Modulus³ | 1200 - 1700 | MPa | — |
| Tensile Elongation³ | 25 - 30 | % | — |
| Aluminium Lap Shear⁴ | 17 - 22 | MPa | — |
| Recommended Operating Temperature⁵ | -40 to 100 | °C | — |
| Value | Units | Test Method / Conditions | |
| Specific Gravity | 1.00 - 1.03 | g/cc | — |
| Viscosity⁶ | 50,000 - 70,000 | cP | — |
| Mix Ratio (by volume) | 1 | — | — |
| Mix Ratio (by weight) | 1 | — | — |
| Value | Units | Test Method / Conditions | |
| Working Time¹ | 10 - 20 | minutes | — |
| Fixture Time² | 30 - 45 | minutes | — |
| Gap Filling | 1 - 5 | mm | — |
| Mixed Color | Off White or Black | — | — |
| Recommended Application Temperature | 18 - 25 | °C | — |
Technical Details & Test Data
- Surface Preparation
The surface to be bonded can affect the strength and durability of the bond joint. Appropriate treatment may be required to ensure that there are no traces of oil, grease, dirt or release agents through the use of a degreasing agent, for instance acetone or another degreasing agent on the joint surfaces. Mechanically abrading or chemically etching degreased surfaces can make bond joints more durable and stronger. If abrading, a second treatment of degreasing is highly recommended. Do not use petrol (gasoline), low grade alcohol or paint thinners.
Metals
Typically, the surface should be clean and dry by using an alcohol/solvent wipe and allowing the solvent to evaporate before application. Certain metals, such as carbon steel may also require mechanical abrasion and a subsequent alcohol solvent wipe prior to bonding
Thermoplastics
The surface must be clean, dust-free and dry. A suitable solvent such as iso-propanol can be used to degrease
Composites
The surface must be clean, dust-free and dry. This can be achieved by the use of proprietary strippable cloths such as peel-ply (without lubricant contaminates). The laminate should be fully cured prior to bonding and if the laminate surfaces are more than 3 days old, it is recommended that the surface must be cleaned with a suitable solvent or cleaner with a lint-free, clean cloth prior to bonding.
Packaging & Availability
- Packaging Type
- Regional Availability
- Packaging Information
Crestabond M7-15 is supplied in 18Kg (40 lb) plastic pails, 180Kg (397 lb) drums, pre-packed 50ml and 400ml side by side cartridges.
Storage & Handling
- Shelf Life
- 9 Months
- Storage and Shelf Life
Crestabond products should be stored in their original container out of direct sunlight. The bulk product or cartridge material should be opened only immediately prior to use. The expiry date is indicated on the product labels. The shelf life is defined from date of manufacture when stored at a recommended temperature between 2°C and 23°C (36°F and 73°F). It is highly recommended that products should never be frozen. Exposure to temperatures above 23°C (36°F) will reduce the shelf life of these materials. Exposure above 35°C (95°F) of activators, including the cartridges, should be avoided as the reactivity of the product is quickly diminished.