This specification covers a fast drying chlorinated rubber intermediate paint, available in white or tints, intended for use as either an intermediate coat or topcoat over a chlorinated rubber primer or other suitable primers. It has good durability when exposed to exterior environments but may show some tendency to chalk. This coating may be used on exterior non-submerged surfaces, as well as most submerged surfaces. This coating is not recommended for areas exposed to strong organic solvents, oxidizing acids, or areas where the surface temperature exceeds 165°F (74°C). Straight chain unsaturated acids and fats and oils of animal or vegetable origin will cause softening and swelling of the coating.
This coating, when applied over properly primed steel surfaces and followed by at least one (optional) finish coat of SSPC-Paint 19, “Chlorinated Rubber Topcoat Paint,” is suitable for exposures in Environmental Zones 1A (interior, normally dry), 1B (exterior, normally dry), 2A (frequently wet by fresh water), 2B (frequently wet by salt water), 2C (fresh water immersion), 2D (salt water immersion), 3A (chemical, acid), 3B (chemical, neutral), and 3C (chemical, alkaline).
This paint is intended for application by brush, roller, or spray and is to be applied in accordance with SSPC-PA 1, “Shop, Field, and Maintenance Painting of Steel.”
The preferred types of primers for use under this coating and on steel surfaces include chlorinated rubber (SSPC-Paint 17), modified chlorinated rubber, chemically cured epoxy, zinc-rich, and others specifically recommended by the manufacturer. Recoat of each primer should conform to the manufacturer’s directions. Where a zinc-rich primer is used and the system is considered for water-immersion services, a sealcoat between the primer and this intermediate coat may be required to eliminate blistering.
If this coating is applied over alkyd- or oil-base enamels, there is the possibility of lifting, particularly on interior surfaces. A spot check is necessary to determine suitability. If lifting occurs, then a seal-coat, as recommended by the manufacturer, may be required. For immersion service, this coating should not be applied over alkydor oil-base enamels.
This coating is a mixture of white pigments, tinting pigments, chlorinated rubber, chlorinated resins, plasticizers, and solvents.
his paint contains approximately 35% by volume of nonvolatile film-forming solids (pigment and binder). The theoretical spreading rate for a 3.0 mil (76 micrometers) dry film thickness is 190 square feet/U.S. gallon (4.6 square meters/liter). Actual spreading rates can be significantly lower.
