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Our Products

WPCP Polyester Pigments

These are dispersions of inorganic and organic compounds in a special grade of unsaturated polyester resin vehicle, which cross links during curing with commercial grades of Gelcoat and GP resin systems.

Opaque and Translucent Pigments are two varieties in this range.

Pigment Usage Levels

The following is the recommended usage level of WPCP Pigments with commercial grades of molding resins. The percentage levels listed here is based on the weight of the molding resin.









Sheet/Dough Molding Compounds



Translucent Pigments Usage



Filled Castings




Not using enough pigments may lead to non-uniformity of color and other surface defects. Higher pigmentation levels will provide better color uniformity, color depth, brightness and longer durability.

Mixing Instructions

WPCP Pigments mix readily with commercial polyester and epoxy resin systems. Small quantities of pigments can be mixed easily by hand stirring. However, for large quantities of pigment, power mixing is necessary. The following guideline is helpful for mixing WPCP Pigments with resins:

1. Add a weighed quantity of the pigment into a mixing container, followed by a small amount of the resin.  

The contents are mixed well until the color is uniform.

3. This is followed by adding the remainder of the resin, with further mixing, until the system is homogeneous in color.  

Catalyst and Accelerator Addition

The catalyst for curing the pigmented resin should be added as per the instructions of the original manufacturer of the resin. As a general working rule the catalyst should be added to the pigmented resin just before actual usage.

Storage Stability

WPCP Pigments have excellent stability in storage and the minimum guaranteed shelf-life is 24 months. Storage below 25 Celsius is recommended for longer shelf life.

Color Matching

WPCP Pigments can be mixed with one another to obtain intermediate shades. Dark shades present no particular color matching problems, but light shades may pose some difficulty. WPCP uses the latest state-of-the art color matching computer software and tools. Colors can be custom matched to customer's requirements, provided the minimum quantity is over 250 Kilograms.

Contact [email protected] for sales or technical assistance on our Polyester Pigment products.

Color Chart

View over 132 colors online.

(Click on the colors above to enlarge)
You can download our catalog in PDF Format [Page 1, Page 2, Page 3]

Literature and Links

1. WPCP Pigments - Product Profile
2. WPCP Pigments - MSDS

Value Proposition

Premium Pigments: Quality inorganic and organic pigments from ISO certified companies, conforming to the Color Index (C.I.) standards, are used in the formulation of the dispersion.

Compatibility: This base vehicle offers excellent compatibility with commercial grades of polyester resin.

Superior Cross Linking: The unsaturated pigment grade resin in our Polyester Pigments cross links during curing and provides better structural properties to the composite.

Flexibility: The chain length of the pigment grade resin is designed to provide flexibility in the polymer, thereby preventing surface brittleness of the finished composite.

Micron Particles: The pigment particles are processed to attain a particle size below 5 microns.

Dispersion Stability: The particles are dispersed and stabilized using specially formulated surface active agents, using science based on the DLVO concept.

Maximum Loading and Hiding Power: Our formulations contain the maximum loading of dry inorganic and organic colors in the pigment dispersion, thereby giving maximum coverage and hiding power.

Color Uniformity: Provides a uniform surface coloration and streak-free appearance in the finished composite.

Color Consistency: Computerized color analysis laboratory using spectrophotometers enables color consistency between batches.

ISO Procedures: Processing is done follow ISO 9002 quality systems, ensuring optimium quality control.


Product Applications

WPCP Pigments have been widely used since 1998 in manufacturing processes such as Hand Lay-Up, Spray Lay-Up, SMC, DMC, Pultrusion, Filament Winding, Vacuum Bagging, RTM, and RFI. It has served to color the products of numerous industry segments.

Building Industry - Structural frames and bridges, doors and windows, flooring and tiles, table top laminates, bathtubs and jacuzzi, bathroom accessories and fittings, roof sheets, ladders, fences, mobile dwellings, portable toilets, and water tanks.
Marine Industry - Boats and ship construction, decks, and masts.

Aerospace and Automotive - Aircraft bodies and structural frames, wings, helicopter blades, space equipment, rocket bodies, missile housing, car bodies, fenders, and canopies.

Sports - Surf boards, skis, protective gear and helmets, fishing rods, goal posts, and flag masts.

Medical - Prosthetics (artificial limbs)

Chemical Industry - Process plant equipment, pressure vessels and containers, tanks, cooling towers.

Electrical Industry - Switch boxes, electrical housings, and electric poles.
Recreational - Amusement park facades and equipment, roof lights, sculptures, specialty furniture, and architectural items.


Superior Performance

Light Fastness: WPCP Pigments exhibit excellent light fastness and will not fade or discolor on exposure to sunlight.

UV Resistance: Ultraviolet (UV) radiation, from sunlight, accelerates the chemical and physical degradation of FRP moldings exposed to outdoor conditions. The degradation occurs mostly on the surface of the molding. But once degraded, the surface tends to chalk and erode due to weathering, exposing fresh surface to further attack. Protection of outdoor structures fabricated in FRP is, therefore, important. WPCP Pigments absorb and convert UV radiation into heat, which is dissipated to the surrounding medium readily. Therefore, pigments prolong the outdoor service life of composite moldings. Protection by this mechanism depends on the pigment concentration on the surface. Gel coats having higher pigment loading will, therefore, afford longer protection.

Outdoor Durability: The durability of the WPCP Pigments depend on environmental conditions such as heat, light, moisture, and industrial pollutants present in the atmosphere. Generally the darker shades will have better durability when exposed to outdoor conditions.

Heat Resistance: FRP moldings manufactured using dough/sheet molding compounds are usually processes at elevated temperatures of 140 0C to 160 0C, or higher. The heat resistance of the pigments in such applications depend on exposure time, temperature, oxidizing conditions during processing, heat transfer coefficients, and heat transport rates. We supply special polyester pigments for coloring these moldings.

Chemical Resistance: The compatibility of pigments to chemicals depends on the material constitution of the pigments themselves. As a general rule chemicals that would react with polyester resins would be incompatible with the pigments. Our technical staff would be able to assist you in recommending the available choice of colors for your applications.

Electrical Properties: Polyester moldings are used to a large extent in electrical applications. Special WPCP Pigments can be offered which will have no adverse effects on track resistance, surface resistivity, dielectric strength and other insulation properties.

Toxicity: The toxicity of Pigments depends on the raw materials used in the formulation. We can recommend a choice of pigments depending on your requirements.


"WPCP - Your Right Solutions"


"High Quality Polyester Colour Pastes and Gelcoat"
Pigment, colour paste, unsaturated polyester resin, epoxy resin, vinyl ester resin, PUR systems,
acrylic systems and gel coats.

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