Barrier 77

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Barrier 77 Zinc Primer Protective Coating

Product Description

This is a two component polyamide cured zinc rich epoxy coating. It is a high zinc dust containing product.
It conforms to the compositional requirements of SSPC paint 20, level 2. It provides very good corrosion
protection as part of a complete coating system. To be used as primer in atmospheric environments.
Suitable for carbon steel, repair of inorganic zinc silicate coating and damaged galvanised steel substrates.
This product complies with ASTM D520 type II zinc dust.


The Application Guide offers product details and recommended practices for the use of the product.
The Application Guide (AG) must be read in conjunction with the relevant specification,
Technical Data Sheet (TDS) and Safety Data Sheet (SDS) for all the products used as part of the
coating system.

Referred standards

Reference is generally made to ISO Standards. When using standards from other regions it is recommended
to reference only one corresponding standard for the substrate being treated.

zinc epoxy Surface preparation and coating should normally be commenced only after all welding, degreasing,
removal of sharp edges, weld spatter and treatment of welds is complete. It is important that all hot work is
completed before coating commences.

The required quality of surface preparation can vary depending on the area of use, expected durability and
if applicable, project specification. Surface preparation Process sequence When preparing new surfaces,
maintaining already coated surfaces or aged coatings it is necessary to remove all contamination that can
interfere with coating adhesion, and prepare a sound substrate for the subsequent product. Inspect the surface
for hydrocarbon and other contamination and if present, remove with an alkaline detergent. Agitate the surface
to activate the cleaner and before it dries, wash the treated area using fresh water. Paint solvents (thinners) shall
not be used for general degreasing or preparation of the surface for painting due to the risk of spreading dissolved
hydrocarbon contamination. Paint thinners can be used to treat small localized areas of contamination such as
marks from marker pens. Use clean, white cotton cloths that are turned and replaced often. Do not bundle used
solvent saturated cloths. Place used cloths into water. When the surface is an existing coating, verify with technical
data sheet and application guide of the involved products, both over coatability and the given maximum over coating
interval. Soluble salts removal Soluble salts have a negative impact on the coating systems performance,
especially when immersed. Jotun's general recommendations for maximum soluble salts (sampled and measured
as per ISO 8502-6 and -9) content on a surface are: For areas exposed to (ISO 12944-2): C1-C4: 200 mg/m²
C5M or C5I: 100 mg/m²
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