Paint & Coating Additives — Complete Formulation Guide for GCC Manufacturers

Additives are present in most paint and coating formulations at only 0.1-3% by weight — yet they disproportionately determine the performance of the final product. In the GCC market, where ambient temperatures regularly exceed 40°C, UV radiation is among the most intense in the world, and product must perform in coastal humidity and desert dust simultaneously, additive selection is not a secondary consideration — it is a primary formulation parameter.

This guide covers the major additive categories used in GCC-manufactured paints and coatings, with specific attention to performance requirements and product selection criteria for the region's climate.

Additive Categories and Their Functions

1. Dispersants and Wetting Agents

Dispersants stabilise pigment and filler particles in the liquid phase by preventing flocculation (re-agglomeration after grinding). Without an effective dispersant, pigment particles aggregate into clusters that reduce hiding power, cause colour development failure, and accelerate settling.

• Polymeric dispersants (acrylic acid homopolymers and copolymers): standard for water-based paint. Anchor onto pigment surfaces via carboxylate groups; stabilise via steric and electrostatic repulsion. Typical addition: 0.2-1.0% on TiO2 weight; 0.5-2.0% on carbon black.
• Hyperdispersants (graft and block copolymers): used in solvent-based systems and for challenging pigments. Provide maximum anchoring and steric stabilisation.
• Wetting agents (fluorosurfactants, silicone surfactants): improve penetration into porous substrates and reduce dynamic surface tension. Useful for concrete coatings in GCC construction applications.

2. Defoamers and Antifoams

Foam control is critical in water-based paint manufacturing and application. Sources of foam: high-speed mixing during production, pump transfer, airless spray application, and roller application. The GCC's high ambient temperatures amplify all foam-generating mechanisms.

• Mineral oil defoamers: cost-effective for architectural paints. Good at 30-40°C. May cause slight surface clouding if overdosed.
• Silicone defoamers: highly efficient at low doses (0.05-0.2%). Risk of surface craters if incompatible. Test compatibility with the specific resin system before production use.
• Silicone-free polymer defoamers: intermediate performance and cost. No silicone contamination risk — preferred for overcoatable topcoats and automotive applications.

See our dedicated defoamer selection guide →

3. Rheology Modifiers (Thickeners)

Rheology control determines viscosity at rest (sag resistance), at medium shear (roller application), and at high shear (spray). In GCC climates, high-temperature storage and application significantly reduce viscosity — thickener selection must account for thermal stability.

4. Biocides — In-Can and Dry-Film

Water-based paints provide an ideal growth medium for bacteria, yeast, and moulds. In the GCC, warm temperatures year-round mean that without adequate biocide protection, water-based paints can deteriorate within weeks. Two distinct biocide functions are required:

• In-can preservation (targets bacteria and yeast in the liquid paint): isothiazolinone blends (CMIT/MIT at 0.15-0.3%, or MIT-only for CMIT-free formulations), benzisothiazolinone (BIT). Must remain active for the product's full shelf life (typically 24 months).
• Dry-film protection (targets mould and algae on the dried paint film): OIT (2-octyl-2H-isothiazol-3-one), IPBC (iodopropynyl butylcarbamate), DCOIT. Critical for exterior architectural coatings in UAE coastal areas and Saudi Arabia's humid Red Sea coast regions.

5. UV Stabilisers and Light Stabilisers

The GCC receives some of the highest UV radiation intensity in the world (UV index regularly 10-12+ in summer). For exterior coatings, UV stabiliser packages are essential to prevent:

• Chalking (TiO2 photocatalytic degradation of the binder)
• Gloss loss and yellowing (especially in aliphatic polyurethane and acrylic topcoats)
• Colour fade (particularly in organic pigments)

Standard UV stabiliser package for exterior GCC coatings: UVA (UV absorber, typically benzotriazole or triazine-based, 0.5-1.0%) + HALS (Hindered Amine Light Stabiliser, 0.3-0.7%). This dual approach provides broad-spectrum stabilisation — the UVA absorbs harmful UV radiation; the HALS scavenges the radicals generated by any UV that penetrates.

6. Coalescents

Coalescents are temporary plasticisers added to water-based paints to lower the minimum film formation temperature (MFFT) and ensure proper film formation. In the GCC context, most exterior applications occur at ambient temperatures well above the MFFT, so coalescent requirements may be lower than in European formulations. However, for air-conditioned interior application and for cold-weather application in Saudi Arabia's northern highlands, coalescent optimisation remains important. Texanol (2,2,4-Trimethyl-1,3-pentanediol monoisobutyrate) is the standard GCC market coalescent; low-VOC alternatives (Optifilm, DPnB) are increasingly used for SASO compliance.

Sourcing Additives in the UAE and Saudi Arabia

Raykem supplies a range of paint and coating additives for GCC manufacturers from our Dubai and Riyadh offices. Our technical team can advise on additive selection, compatibility, and optimal addition levels for your formulation. View our full raw materials range → or contact our team →