SikaCor®-2440 MF
SikaCor®-2440 MF is a high solid 2-pack primer and intermediate coat based on epoxy resin. Low solvent content acc. to Protective Coatings Directive of German Paint Industry Association (VdL-RL 04).
- Outstanding corrosion protection
- Dry film thickness up to 200 μm per layer
- Very fast curing, short overcoating time
- Especially suitable for work-shop application
Usage
Mechanically resistant and fast curing primer and intermediate coat for atmospheric exposed steel surfaces, e.g. steel towers, machine parts and constructions for wind turbines. In combination with 2-pack primers and topcoats SikaCor®-2440 MF offers a mechanical resistant coating system for long life corrosion protection with high weather resistance for rural, urban, industry and maritime climates.Advantages
- Outstanding corrosion protection
- Dry film thickness up to 200 μm per layer
- Very fast curing, short overcoating time
- Especially suitable for work-shop application
Packaging
| SikaCor®-2440 MF Comp. A | 250 kg and 24 kg net. |
| SikaCor®-2440 MF Comp. B | 170 kg and 2.5 kg net. |
| Sika® Thinner E+B | 190 l, 25 l and 5 l |
Colour
Approx. RAL 9001, approx. RAL 9002 and sand yellow
Other colours upon request.
Product Details
APPROVALS / CERTIFICATES
- Test reports according to ISO 12944-6, corrosivity categories C3 high, C4 high and C5 high are available.
Shelf life
1 year
Storage conditions
In originally sealed containers in a cool and dry environment.
Density
~1.5 kg/l
Solid content
~80 % by volume
~88 % by weight
Chemical resistance
Weathering, oils, grease and short term exposure to fuels and solvents.
Temperature resistance
Dry heat up to approx. + 120°C
Short term up to + 150°C
Application
Mixing ratio
| Components A : B |
| By weight | 100 : 10.4 |
| By volume | 5.4 : 1 |
Thinner
Sika® Thinner E+B
If necessary max. 3 % Sika® Thinner E+B may be added to adapt the viscosity.
Material temperature
Min. + 5°C
Relative air humidity
Max. 85 %, except the surface temperature is significantly higher than the dew point temperature, it shall be at least 3 K above dew point.
Surface temperature
Min. + 5°C
Pot Life
| At + 20°C | ~1 h |
Drying stage 6
| Dry film thickness 160 µm | |
| + 10°C after | 10 h |
| + 20°C after | 4.5 h |
| + 30°C after | 3 h |
Higher film thicknesses will result in longer drying times.
Waiting time to overcoating
Min. until drying stage 6 is achieved
Max. indoors 3 months / outdoors 4 weeks
In case of longer waiting times thoroughly grinding or sweep-blasting is necessary. Before overcoating ensure that the primed surface is dry and free from oil, grease and dirt.
Temporary storage and the transport of coated parts shall be carried out using appropriate methods. Securing belts or chains shall not be in direct contact with the coated surface and suitable secondary packing shall be employed. Do not use shrink-wrap or any other type of packaging like plastic film.
Drying time
Final drying time
At + 20°C and good ventilation the final hardness is achieved within 5 - 7 days.
Consumption
Theoretical material-consumption/VOC without loss for medium dry film thickness:
| Dry film thickness | 80 µm | 160 µm |
| Wet film thickness | 100 µm | 200 µm |
| Consumption | ~0.150 kg/m2 | ~0.300 kg/m2 |
| VOC | ~18.0 g/m2 | ~36.0 g/m2 |
SURFACE PREPARATION
Steel:
Blast-cleaning to Sa 2½ according to ISO 12944-4 (ISO 8501-1).
Free from dirt, oil and grease.
Surface profile 'medium (G)' according to ISO 8503-2, roughness Rz ≥ 50 μm.
For contaminated and weathered surfaces e. g. primed areas we recommend to clean with SikaCor® Wash.
MIXING
Stir component A very thoroughly using a mechanical mixer (start slowly, then increase up to approx. 300 rpm). Add component B carefully and mix both components very thoroughly (including sides and bottom of the container). Mix for at least 3 minutes until a homogeneous mixture is achieved. Fill mixed material into clean container and mix again shortly as described above. During mixing and handling of the materials always wear protective goggles, suitable gloves and other protective clothings.
APPLICATION
The method of application has a major effect on achieving uniform thickness and appearance. Spray application will give the best results. The indicated dry film thickness is easily achieved by airless spray. Adding solvents reduces the sag resistance and the dry film thickness. In case of application by roller or brush, additional applications may become necessary to achieve the required coating thickness, depending on type of construction, site conditions, colour shade etc. Prior to major coating operations a test application on site may be useful to ensure that the selected application method will provide the requested results.
By brush or roller
Airless-spraying:
- Pressure min. 180 bar
- Nozzle size 0.38 - 0.53 mm (0.015 - 0.021 inch)
- Spraying angle 40° - 80°
- Spraying hose diameter 3/8 inch resp. 10 mm
CLEANING OF EQUIPMENT
Sika® Thinner E+B