Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Composite Materials Functions
- Technologies
- Product Families
Features & Benefits
- Materials Features
- Features and Benefits
- Low density
- Highly thixotropic
- Low shrink
- Lightweight
- No sagging on vertical surfaces
- No print through
Applications & Uses
- Applications
- Composites Processing Methods
- Coverage
As a rough guide, 4.0Kg (9 lbs) of bonding paste will cover one square meter to a depth of approximately 3mm (0.12 inch).
- Applications
Crestafix B72R is supplied pre-accelerated, requiring only the addition of catalyst to start the curing reaction. The recommended catalyst is Butanox M50, which should be added at 2% v/w into the bonding paste. The catalyst should be thoroughly incorporated into the material with a low shear mechanical stirrer where possible, taking care to keep air entrapment to a minimum. Alternatively, the bonding paste can be applied with a dispensing unit.
The use of additional pigments or fillers is not recommended as they can affect the performance of the adhesive.
Properties
- Mechanical Properties
- Typical Properties
- Application Properties
| Value | Units | Test Method / Conditions | |
| Hardness | 70 | Shore D | — |
| Lap Shear Strength (Substrate Failure)² | 5 | MPa | — |
| Shrinkage | min. 1 | % | — |
| Tensile Strength³ | 18 | MPa | — |
| Tensile Modulus³ | 1450 | MPa | — |
| Tensile Elongation³ | 2 | % | — |
| Value | Units | Test Method / Conditions | |
| Viscosity | 108,000 - 124,000 | cP | — |
| Specific Gravity | 0.7 | g/cc | — |
| Value | Units | Test Method / Conditions | |
| Working Time¹ | 55 | minutes | — |
| Gap Filling | 1 - 25 | mm | — |
| Recommended Application Temperature | 18 - 25 | °C | — |
| Color Change | Light Blue to Off-white | — | — |
Technical Details & Test Data
- Substrates and Surface Preparation
Substrates
Crestafix B72R is suitable for use on GRP laminate, but can also be used on timber and plasterboard. However, is recommended that trials are carried out to ensure that adequate bond strengths are obtained.
Surface Preparation
The surfaces to be bonded should be clean, dry and free from any contamination. It may be necessary to mechanically abrade the surfaces to be bonded in order to obtain the bond strength required. Each surface should be coated with the catalyzed bonding paste and held together until the adhesive has hardended.- Note
- Working time measured with 100g of adhesive with MEKP (2%) at 25°C (77°F).
- GRP lap shear tested to BS ISO 4587.
- Tensile properties tested to BS EN ISO 527-2.
- Viscosity measured using Brookfield Viscometer at 25°C (77°F)
Packaging & Availability
- Country Availability
- Packaging Type
- Regional Availability
- Packaging
Crestafix B72R is supplied in metal drums and kegs.
Storage & Handling
- Shelf Life
- 12 Months
- Storage and Shelf Life
Crestafix B72R should be stored between 2°C and 23°C (36°F and 77°F) in the original, unopened container in a dry, well ventilated place. Protect from freezing and direct sunlight. Avoid contact with oxidizing agents.
The shelf life is defined from the date of manufacture when stored as recommended. The expiry date is indicated on product labels.