Barrier 77 is a two-pack zinc rich epoxy primer that complies with the compositional requirements for SSPC Paint 20 level 2. Barrier 77 is supplied with ASTM D520 Type II zinc dust.
As a zinc rich primer on blast cleaned steel. Barrier 77 is used in combination with advanced coating systems to further improve protection against corrosion.
Film thickness and spreading rate
Film thickness, dry (µm)
Film thickness, wet (µm)
Theoretical spreading rate (m²/l)
Solids (vol %)*
25ºC ± 2
gms/ltr UK-PG6/23(97). Appendix 3
*Measured according to ISO 3233:1998 (E)
All surfaces should be clean, dry and free from contamination. The surface should be assessed and treated in accordance with ISO 8504.
Cleanliness: Blast cleaning to min. Sa 2 ½ (ISO 8501-1:2007) or for maintenance UHPWJ to WJ2 (NACE No.5/SSPC-SP 12). Roughness: using abrasives suitable to achieve minimum grade Fine (ISO 8503-2).
Clean, dry and undamaged approved shopprimer.
The coating may be used on other substrates. Please contact your local Jotun office for more information.
Condition during application
The temperature of the substrate should be minimum 5°C and at least 3°C above the dew point of the air, temperature and relative humidity measured in the vicinity of the substrate. Good ventilation is required in confined areas to ensure correct drying.
Use airless spray
Recommended for stripe coating and small areas, care must be taken to achieve the specified dry film thickness.
Mixing ratio (volume)
3 part Comp. A (base) to be mixed thoroughly with 1 part Barrier/Barrier 77, Comp. B (curing agent) ½ hour prior to use.
Pot life (23°C)
24 hours (Reduced at higher temp.).
Jotun Thinner No.
Guiding data airless spray
Pressure at nozzle
15 MPa min (150 kp/cm², 2100 psi.).
0.38 - 0.53 mm (0.015 - 0.021").
40 - 80°
Check to ensure that filters are clean.
Drying times are generally related to air circulation, temperature, film thickness and number of coats, and will be affected correspondingly. The figures given in the table are typical with:
* Good ventilation (Outdoor exposure or free circulation of air)
* Typical film thickness
* One coat on top of inert substrate
Dry to recoat, minimum
Dry to recoat, maximum
Recommended data given for recoating with coatings normally specified on top of zinc epoxy coatings.
The surface should be dry and free from any contamination prior to application of the subsequent coat.
The given data must be considered as guidelines only. The actual drying time/times before recoating may be shorter or longer, depending on film thickness, ventilation, humidity, underlying paint system, requirement for early handling and mechanical strength etc. A complete system can be described on a system sheet, where all parameters and special conditions could be included.
Typical paint system
Barrier 77 1 x 25 - 75 µm (Dry Film Thickness)
Subsequent coating(s) by choice e.g.: Epoxy, Acrylic or Vinyl.
Other systems may be specified, depending on area of use
The product must be stored in accordance with national regulations. Storage conditions are to keep the containers in a dry, cool, well ventilated space and away from source of heat and ignition. Containers must be kept tightly closed.
Handle with care. Stir well before use. Continuous stirring during application will prevent the heavy zinc pigment from settling.
9 litre unit: 6.75 litres Comp. A (base) in a 10 litre container and 2.25 litres Barrier/Barrier 77, Comp. B (curing agent) in a 3 litre container.
Packing may vary from country to country according to local requirements.
Health and safety
Please observe the precautionary notices displayed on the container. Use under well ventilated conditions. Do not breathe or inhale mist. Avoid skin contact. Spillage on the skin should immediately be removed with suitable cleanser, soap and water. Eyes should be well flushed with water and medical attention sought immediately.
For detailed information on the health and safety hazards and precautions for use of this product, we refer to the Material Safety Data Sheet.
The information in this data sheet is given to the best of our knowledge based on laboratory testing and practical experience. However, as the product can be used under conditions beyond our control, we can only guarantee the quality of the product itself. We also reserve the right to change the given data without notice. Minor product variations may be implemented in order to comply with local requirements.
If there is any inconsistency in the text the English (UK) version will prevail.
Jotun is a World Wide company with factories, sales offices and stocks in more than 50 countries. For your nearest local Jotun address please contact the nearest regional office or visit our website at www.jotun.com
5 OCTOBER 2011
THIS DATA SHEET SUPERSEDES THOSE PREVIOUSLY ISSUED
PDF Version :
- TDS - Barrier 77 - English (uk) - Issued.05.10.2011.pdf
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