W61 Organic Silicone High Temperature Resistant Paint

Product Description:

This is a single component high temperature paint containing organic silicone resin.

Multiple coatings can be applied during the curing crosslinking process without heating curing required. It can resist high temperature of 540℃ (1004℉).

Design Purpose:

It is used to protect open-fire chimneys, common chimneys, exhaust devices, ventilation equipment and pipeline steel from corrosion.

If the strongest anticorrosive protection is required, a zinc silicate primer should be applied before the product is coated.

Coating Data:

Color: aluminium, black, limited colors

Gloss: not applicable

Typical thickness: dry film thickness of 25 microns.

Theoretical coverage: 16 m²/L at the dry film thickness of 25 microns.

Practical coverage: allow proper loss coefficient.

Construction method: air spraying, brush coating, roller coating.

Drying time: Recommended finish recoating interval

Surface treatment:

All surfaces to be coated shall be clean, dry and free from contaminants. All surfaces shall be evaluated and treated in accordance with ISO 8504:2000 prior to application.

Oil and grease shall be removed according to SSPC-SP1 solvent cleaning standard.

Blasting

The steel surface is sand-blasted to conform to Sa2.5 (ISO 8501-1:2007) or SSPC-SP6. If oxidation occurs between sand blasting and W61 application, the surface shall be sand-blasted to the specified visual standard.

Surface defects exposed during the sand blasting process shall be polished, filled or treated in a suitable manner.

It is recommended that the surface roughness be at least 25-50 microns.

Treat manually or with a power tool.

All coatings on the surface must be removed prior to the application of W61.

Clean manually or with a power tool to conform to St3 (ISO 8501-1:2007) or SSPC SP3 minimum standard.

Construction description:

Notes: all scales must be removed. The areas in which the scales that cannot be removed with a shovel or properly treated with a needle gun shall be sand-blasted locally to conform to Sa2 (ISO 8501-1:2007) or SSPC SP6 minimum standard. This situation generally applies to class C or class D corrosion of this standard.

Surface precoated with primer

W61 is suitable for application to steel components with new zinc silicate shop primer.

If the zinc dust shop primer peels off in a large-area scattering shape or generates a large amount of zinc salt, the whole area shall be blast-cleaned thoroughly.

If the surface cannot be coated with other types of shop primers, it shall be thoroughly removed by abrasive blasting.

Welds and damaged areas shall be at least treated to conform to Sa2.5 (ISO 8501-1:2007) or SSPC-SP6 standard.

Spray metallic aluminium

Metallic surfaces shall be sprayed with fresh, clean, moisture-free gases that do not contaminate steel surfaces.

Mixing: this coating is a single-component coating, which shall be completely stirred with a power stirrer  before construction.

Recommended construction method: air spraying (with pressure tank), DeVilbiss MBC or JGA spray gun

704 or 765 air nozzle

E nozzle

Air spraying (traditional) Use suitable special equipment

Diluent: special diluent for organic silicon series paints

Operation suspension: do not retain paint in the paint tube, the spray gun or the spraying equipment. Rinse all equipment thoroughly with special diluent for organic silicon series paints. It is not recommended to reseal the paint after mixing. If the work is interrupted for too long time, it is recommended to remix a set of paints for construction.

Cleaning: All equipment shall be cleaned immediately with special diluent for organic silicon series paints after use. It is a good habit to wash the spraying equipment regularly in daily work. The cleaning frequency depends on quantity of spray, temperature and spraying time, including delayed time and other factors.

All residual paints and containers shall be disposed in accordance with the appropriate local laws/regulations.

Product characteristics:

W61 is a moisture curing paint, which does not produce water vapor in the heat curing process like ordinary silicone paint. Therefore, the application thickness is 25 microns instead of 15 microns.

In case of heating, a single coating can be applied to a maximum thickness of 40 microns without bubbling.

Three coatings can be applied, the thickness of each coating is 25 microns, and no heating is required between coatings. This provides maximum protection when zinc silicate primer is not available.

There are varieties with two colors for selection: aluminum and black. Due to the superior performance of the aluminum-containing variety, it is recommended that the aluminum W61 be used wherever possible. The black variety is used only for special applications/requirements. Please consult with CHANGZHOU DONGFANG COATING (NIGERIA) CO., LTD for more information.

W61 aluminium powder varieties are suitable for the protection of steel structures continuously working at the drying temperature up to 540°C and sand-blasted. However, the maximum operating temperature is 400°C on the manually treated substrate.

W61 black varieties are suitable for the protection of steel structures continuously working at the drying temperature up to 400°C and sand-blasted. However, the maximum operating temperature is 300°C on the manually treated substrate.

Before the high temperature resistant paint is recoated on the inorganic zinc primer, the curing instructions in the product data sheet shall be followed to ensure that the inorganic zinc primer has been completely cured.

When the zinc silicate primer is used for optimal corrosion protection, it is recommended that the dry film thickness of the zinc silicate coating be 50 microns to ensure the maximum surface strength in the subsequent temperature cycles and avoid finish peeling.

It is best to recoat the zinc silicate paint before oxidation. However, if this is not possible, the zinc silicate surface shall be clean and free from zinc corrosion product.

In corrosive environments, use black W61 directly on the zinc silicate primer. Due to the salting-out effect of the undercoat, significant color change from black to gray will occur. Before the application of W61 black paint, firstly apply a W61 aluminum powder coating to seal the zinc silicate primer, greatly reducing this color change. The highest dry temperature resistance of the paint is 400°C.

W61 is not suitable for exposure to acidic or alkaline environments.

System compatibility:

This product is a special paint, so that it can only be matched with a few products. The suitable primer is E06-1 inorganic zinc-rich primer, and the suitable finish is W61 organic silicon high temperature resistant finish.

Safety precautions:

This product shall be used by professional coating workers on the production site in accordance with the recommendations in this manual, the material safety data sheet and the instructions on the packaging containers. This product shall not be used without consulting the material safety data sheet (MSDS) provided by CHANGZHOU DONGFANG COATING(NIGERIA)CO.,LTD. to its customers.

All work related to the construction and use of the product must be carried out in accordance with the relevant national health, safety and environmental standards and regulations.

If welding or flame cutting is required on the metal coated with the product, dust and smoke will be generated. Therefore, appropriate personal protective equipment and adequate local ventilation will be required.

If there is any doubt about the applicability of this product, please consult with consult with CHANGZHOU DONGFANG COATING(NIGERIA)CO.,LTD.

Important explanation：

The information provided in the product manual is not exhaustive. Any person who uses any product other than those specifically recommended in this manual for any purpose without our written confirmation shall be at the risk of the product’s suitability for its intended purpose. Although  all suggestions or statements made about the product (whether in this manual or otherwise) are correct in our best understanding, we cannot control the quality or condition of the substrate or the factors affecting the use and application of the product. Therefore, we shall not be liable (to the maximum extent permitted by law) for any performance problem of the products or any loss or damage caused by the use of the products unless we specifically agree to such practice in writing. We hereby disclaim any express or implied warranties or representations, whether by legal operation or in other ways, including but not limited to implied warranties of merchantability or fitness for a particular purpose. All supplied products and instructions are subject to our standard sales terms and conditions. You should request a copy of this document and read it carefully. The information contained in this product manual will be modified from time to time according to experiences and our development policy. It is the customer’s responsibility to check the latest version of the product manual with the local representative before using the product.