Dow Corning 236 Dispersion Coating

Dow Corning 236 Dispersion Coating is a silicone rubber coating. It is easily applied to a wide variety of surfaces to provide a dry-surfaced, durable, rubbery coating.
Supplied as a liquid, the coating material can be applied by brushing, spraying, dipping, roller coating or stamp coating. It cures to form a smooth, white rubber coating at room temperature when exposed to the air.

Release coating for protecting surfaces from weathering, corrosion and dirt.

USES
Dow Corning® 236 Dispersion Coating is designed for use as a release coating to provide easy clean-up and to provide protection of surfaces from weathering and corrosion. It can be used as a lining to protect plastic containers or vessels and to shield plastic materials from weathering or sticky materials.
The cured coating is an electrical insulator. Specific uses include:

• Latex manufacturing equipment – facilitates clean-up of areas subject to splashes and spills
• Conveyor belts – can prevent adhesion of sticky materials; helps keep build-up from forming
• Rolls – can help prevent adhesion of coated paper or coated fabrics
• Paint spraying operations – can make clean housekeeping easier
• Dryer flights – can prevent adhesion of products
• Waste handling equipment – can hold down build-up that adds weight and reduces capacity of containers
• Urethane and polyester molding – can provide easy removal of flash

FEATURES

• Supplied as low viscosity; cures to tough rubber coating
• Oxime cure at room temperature by reaction with moisture vapor in the air

BENEFITS

• Good release – can release sticky materials (except silicones); can prevent process materials from sticking to rolls and conveyors
• Can reduce equipment clean-up caused by build-up of sticky materials
• Can be applied “on the job” – does not require disassembling equipment to apply or repair the coating

COMPOSITION

• Solvent dispersion of one-part silicone rubber

LIMITATIONS
May discolor brass, copper and other sensitive metals. May stress crack plastics like polycarbonate. Test before use.
This product is neither tested nor represented as suitable for medical or pharmaceutical uses.

HOW TO USE

Surface Preparation
Surfaces must be clean and dry before curing. Moisture, grease, oil, dirt and cleaning agents can interfere with adhesion of the coating.
Clean the surface with a solvent to remove foreign material. Then wash with Dow Corning ® OS Fluid or acetone to remove moisture and any residue from the first cleaning operation. In general, solvent cleaning of wood surfaces is not necessary.
For best adhesion, apply a light, uniform coating of Dow Corning ® 1200 Prime Coat by brushing or spraying.
Allow the prime coat to dry for 45 minutes at normal temperature and humidity conditions. Avoid excess prime coat. Light, uniform application is best. A low-VOC primer version is available as Dow Corning ® P5200 Adhesion Promoter.

Cures by Air-Drying
Apply Dow Corning 236 Dispersion Coating and allow to air-dry 24 hours at room temperature in a humid atmosphere, such as ≥50 percent relative humidity.

Optimum Coating Thickness
The dry film thickness obtained from each application of Dow Corning 236 Dispersion Coating should be between 4 and 18 mils. If thicker sections are required, additional coatings should be made. Before applying an additional coat, clean the coated surface with Dow Corning OS Fluid. Between coatings, allow 2 to 4 hours for each layer to dry at room temperature in a humid
atmosphere.
Repairs to coatings can easily be made by the same procedure.

Application Methods
For precise control of coating thickness, spraying is the best method of application. However, brushing, dipping, roller coating or stamp coating may be used. To obtain the viscosity most suited to a particular spraying system, the dispersion may be thinned with a solvent such as VM&P naphtha or Dow Corning OS Fluid.

Cleaning Application Equipment
To keep the dispersion from setting up and curing in spray guns, brushes, lines or rollers, thoroughly clean the application equipment immediately after use with a solvent such as Dow Corning OS Fluid.

SHIPPING LIMITATIONS
DOT Classification: Flammable.

STORAGE AND SHELF LIFE
Because Dow Corning 236 Dispersion Coating cures to a rubbery mass on exposure to humid air, storage containers should be kept closed when not in use. The recommended procedure is to remove the quantity needed for a single application and keep the remaining material in a closed container. Store below 90°F (32°C). Dow Corning 236 Dispersion Coating has a shelf life of 12 months from date of manufacture. Refer to product packaging for “Use By” date.

Click here for the Product Data Sheets(PDF Files)

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