Alkali-resistant, UV-durable pigments for paving blocks, roof tiles, fibre-cement boards, coloured cement, and concrete.
Discuss Your ApplicationConstruction pigments live in alkaline cement matrices (pH 12-13) and must hold their color through years of UV exposure, rain cycles, freeze-thaw, and atmospheric pollutants. The wrong pigment fades within months; the right pigment lasts the lifetime of the structure.
Iron oxides (PR101 reds, PY42 yellows, PBr6 browns, PBk11 blacks) dominate cement coloring for cost reasons and unbeatable alkali stability. They produce earthy, slightly muted shades suitable for paving blocks, roof tiles, and concrete pavers. Loading is 3-7% on cement weight.
Where brighter, cleaner shades are needed: phthalocyanine blues and greens (PB15:3, PG7) work directly in cement matrices with no pre-treatment. Alkali-treated organic yellows and reds (PY83, PY154, PR48:2, PR48:4) work but require accelerated alkali-stability validation before bulk use. Always validate any organic pigment with a 28-day cement curing exposure test before committing to a large project.
Construction projects require consistent color across hundreds of tonnes of mortar or concrete batched over weeks of pour. Our cement-grade pigments are validated for batch-to-batch ΔE less than 1.5 — adequate for matching color across paving block production runs and roof-tile manufacturing campaigns.
Iron oxide pigments (PR101 reds, PY42 yellows, PBr6 browns, PBk11 blacks) are inherently alkali-stable up to pH 13 and work directly in cement without pre-treatment. Phthalocyanine grades (PB15:3, PG7) are also alkali-stable. For organic yellow and red shades, use alkali-treated variants and validate with accelerated alkali-stability tests before bulk use.
Typical pigment loading is 3-7% by cement weight for visible color development. Iron oxide reds typically use 4-5% for terracotta shades; iron oxide blacks use 5-7% for dark grey to charcoal shades; organic phthalocyanine blue uses 2-3% for vivid blue tile color. Higher loadings give deeper shades but reduce concrete strength incrementally.
Yes. Iron oxide and phthalocyanine grades have proven 20+ year outdoor durability in concrete applications. Lightfastness ratings 8/8 on Blue Wool scale (ISO 105-B02). Test data and reference installations available on request. Construction-grade pigments ship with full documentation including alkali-resistance test results.
Share your binder system, processing temperature, and required performance — our technical sales team will recommend the right grade and ship a free 50-100g sample for qualification.
