Mineral Surfaces · Solutions
A heritage cement-plastered Pune bungalow facade, a 4-storey Bangalore residential RCC tower, a compound wall around a Mumbai sea-facing villa, a Pondicherry colonial-style boundary in coarse lime render — Indian exterior walls earn their life under three concurrent climate loads: monsoon RH 80–95% for three months, intense UV for nine, and coastal salt-air on the western and eastern seaboards with a 30–50% UV-degradation multiplier over inland sites. Most legacy Indian facades are painted with acrylic or alkyd emulsions that film-form on the surface and fail at the first monsoon — blistering at substrate cracks, peeling at the chajja drip line, biological growth at the north face within two seasons. The LEINOS exterior-walls system documented for that reality is mineral-bonded: sol-silicate ProfiSol and silicate Universil topcoats over a primer and quartz-filler base, chemically silicified into the lime, cement, or masonry substrate so the coating becomes part of the wall.
Find your application
Residential or commercial 2–4 storey facade — RCC bungalow, low-rise apartment, painted-plaster villa, hill-station guesthouse. Default stack: 622 primer + 610 quartz filler + 612 ProfiSol Fine (mineral substrate, smooth render) OR 614 Universil Fine (previously emulsion-coated facade). Pro-line economics make 612/613 the canonical choice when facade area exceeds 200 m² (cost-per-m² advantage and deeper silicification than ready-mix alternatives). For Mumbai/Goa/Chennai/Pondicherry coastal facades, plan a 12–18 month earlier first-recoat than inland.
4 compatible productsWater-based silicate primer that evens absorbency on interior mineral walls — lime plaster, cement, clay, brick, aerated concrete, gypsum board. The prep coat under LEINOS lime, silicate, and natural mineral paints.
View product detailsFibre-reinforced quartz filler primer for mineral facades — levels hairline cracks and plaster repairs up to 0.4 mm.
View product detailsProfessional fixative for workability control — serves as primer and binder for mineral facade systems.
View product detailsSol-silicate facade paint with mineral character — silicification-capable, water-vapour diffusible, available in 200+ colours.
View product detailsSystem & Substrates
For heritage-bungalow boundary walls where a hand-finished limewash register is the design intent, consider Lime Paint 665 from the Interior Walls solution as a cross-product alternative. For architect-specifier project context, the Exterior Mineral Facades solution covers the same products at specifier depth.
The Coating System
Primer plus topcoat — the full chain.
Topcoat Options
Choose the finish character; the primer underneath stays the same.
Mineral Plaster Primer 622 — silicifies into the lime, cement, or RCC substrate of the typical Indian residential / commercial facade. Skip Profi Fixative 611 on sound mineral substrates; reserve it for chalking concrete in the masonry route. One coat, touch-dry 6–12 h, topcoat from 12 h.
Mineral Plaster Primer 622 — potassium-silicate water-based primer. Apply over clean, dry, sound mineral facade (lime plaster, cement plaster, RCC). Coverage ~5 m²/litre at one coat. Whitish pigment for coverage verification.
Profigrund Quartz Filler 610 — fibre-reinforced ground coat. Apply when the facade carries hairline cracks (<0.4 mm) or uneven surface differences. Skip when the facade is freshly rendered and visually flat.
Profigrund Quartz Filler 610 — 0.4 mm fibre-reinforced ground coat. Bridges hairline cracks, levels minor plaster differences, anchors the silicate topcoat into the substrate.
ProfiSol Fine 612 (default, bare-mineral facade) or Universil Fine 614 (renovation, previously emulsion-coated facade). Smooth-render finish for residential and commercial facades. 1–2 coats per TDS — contact specifier for coverage and recoat window.
ProfiSol Facade Paint Fine 612 — sol-silicate topcoat. Silicifies with the mineral substrate. sd-value 0.01 m, matte finish, 200+ colours. Default for bare or mineral-coated Indian residential and commercial facades.
Universil Facade Paint Fine 614 — silicate topcoat for facades previously coated with acrylic / alkyd emulsion. Mineralises the existing polymer film instead of bonding through it — no strip-back required.
Step by Step
Walk the facade. Scratch a coin across the surface in three test patches. A polymer film flake = synthetic-coated (use Universil 614). Powder or mineral texture = bare or mineral-coated (use ProfiSol 612). Identify the substrate: cement plaster, lime plaster, RCC, or AAC block. Note all hairline cracks, structural cracks, efflorescence patches, and moisture-source defects (rising damp at the base, leaking pipes, missing chajja drip groove, flashing failures). Fix the moisture-source defects before painting — no surface treatment rescues a moisture-source problem.
Brush off any efflorescence (white salt bloom) — never paint over active efflorescence. If algae or mould visible at the north face or behind chajja, treat with a fungicidal wash, dry 24 h, mechanical-clean again. Pressure-wash the full facade at moderate PSI (1500 PSI; high pressure damages lime plaster and over-erodes weak render). Let dry 48–72 h. Coastal facades (Mumbai, Goa, Chennai, Pondicherry) may need 5–7 days drying after monsoon. Measure substrate moisture content with a contact meter on the shaded face — must read ≤14% before primer.
Fill structural cracks (>0.5 mm) with matching repair mortar; cure 14–28 d. Fresh new render and re-rendered patches require 28 d minimum cure before silicate paint — the silicification reaction needs the substrate to have set chemically. Hairline cracks (<0.4 mm) stay un-filled — these are handled by the optional 610 Profigrund Quartz Filler step.
Stir 622 well. Apply one even coat with brush, roller, or airless spray. Whitish pigment shows coverage; no bare patches. Optionally thin 5–10% with water on extremely absorbent fresh plaster; otherwise apply undiluted. Wipe back any pooled primer on low-absorbency patches after 15–20 minutes. Touch-dry 6–12 h. Topcoat from 12 h (24 h is safer at monsoon edge). Coverage ~5 m²/litre.
If the facade carries hairline cracks (<0.4 mm) or uneven surface levels: apply Profigrund Quartz Filler 610 as full-surface ground coat after 622 has cured. Fibre reinforcement bridges the hairlines; 0.4 mm grain levels minor differences. On a freshly-rendered visually flat facade, skip this step. Let dry per TDS (typically 24 h on exterior).
Stir well. Apply with brush, roller, or airless spray in the cool-dry window (surface 5–30 °C, ambient RH <80%, no rain forecast in next 24 h). Work panel-to-panel maintaining a wet edge to avoid lap marks. Bangalore mid-rise apartment block: typical 2-day application for a 4-storey facade with two-painter crew. For Mumbai high-rise (15+ floors), plan scaffold-zone-by-scaffold-zone with overlap at the seam line so a fresh-and-dry edge is always available.
Apply the second coat after the first has dried (TDS recoat window, typically 12–24 h on exterior). Keep the freshly painted facade dry for at least 24 h after the final coat — a sudden afternoon shower within the cure window damages the silicification reaction and the coating fails patchily within months. In Mumbai/Goa monsoon-edge conditions (October pre-monsoon-retreat, May pre-monsoon-onset), run a tarpaulin overhead on the working face if a freak shower is forecast. Coastal sites: add 12–18 month earlier first-recoat planning into the maintenance calendar.
System Composition
Why It Works
Pick the Right Build
622 Primer + 610 Quartz Filler (cures any plaster hairline cracks) + 612 ProfiSol Fine in 2 coats. Canonical default for Indian new-build 2–4 storey residential. 5–7 year inland repaint cycle.
622 + 610 + 612 ProfiSol Fine — 2 coats
Pressure-wash, spot-repair any peeled patches with matching emulsion (let dry 7 d), then 622 Primer + 614 Universil Fine in 2 coats. Universil mineralises the polymer film instead of bonding through it.
622 + 614 Universil Fine — 2 coats
622 Primer + 610 Quartz Filler (fights monsoon-driven hairline cracking from thermal swing) + 612 ProfiSol Fine in 2 coats. Plan 3–5 y first-recoat (vs 5–7 y inland). South-facing zones may need spot-touch-up at year 2.
622 + 610 + 612 ProfiSol Fine — 2 coats, 3–5 y recoat
What to Expect
What to Avoid
Scope & Limits
This solution covers exterior mineral facades and walls: lime plaster, cement plaster, render, masonry brick, AAC blocks, RCC concrete, WDVS thermal insulation systems, and previously-painted mineral facades in sound condition. It applies to residential bungalows, low- and mid-rise apartment buildings, compound walls, garden walls, soffits, reveals, balcony parapets, and all fixed exterior mineral wall elements where weather exposure (rain, UV, salt air, thermal swing) is the governing load.
In the wild
Common Questions
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