Can I apply over existing synthetic paint?

It depends on the condition. Sound, non-chalking, well-bonded dispersion coatings can usually be primed with LEINOS Mineral Plaster Primer 622 first — the primer creates a uniform mineral base for the topcoat. Flaking, chalking, or oil-based finishes must be fully removed back to a sound mineral substrate.

Is this paint breathable?

Yes. LEINOS mineral wall paints are fully breathable (vapour-permeable), allowing moisture to pass through the wall structure naturally.

How do I prepare the surface?

The surface must be clean, dry, and structurally sound. New plaster must be fully cured (typically 4 weeks). Prime with the recommended mineral primer.

How is LEINOS 660 different from conventional acrylic emulsion paint?

The film-forming binder. Conventional emulsion uses synthetic acrylic polymer (styrene-acrylate or pure acrylic); 660 uses a plant-derived natural-resin emulsion. Workflow is identical — apply, dry, recoat, wash. Result: a wall that washes the same way but breathes more (Class 1 vapour-permeability vs typical Class 2-3 for acrylic). Sits inside the LEINOS natural-materials canon.

Should I specify 660 (natural-resin emulsion) or 665 (lime paint)?

Depends on the wall and the room. For everyday modern apartment interiors — living rooms, bedrooms, offices, studios — 660 is the standard: contractor-familiar, washable, breathable. For heritage walls, humid bathrooms and kitchens with active mould risk, conservation interiors, and traditional lime-plaster substrates — 665. Alkaline lime chemistry suppresses mould on the surface; 660’s natural-resin film does not.

Can I apply 660 over existing acrylic emulsion paint?

Conditional. If the existing acrylic is sound, firmly adhering, matt-finish, absorbent — clean + dust-free + mild abrasion to dull any sheen, then 660 goes over directly. If glossy, lacquered, or flaking, mechanically key the wall and prime with LEINOS 620 Deep Sealer, or strip back to substrate. Strongly alkaline freshly skimmed walls must be neutralised before painting.

Does 660 work on gypsum board and bonded wallpaper?

Yes — TDS explicit on both. Sound, absorbent gypsum board takes 660 directly; very smooth factory-finished sheets accept the paint better with a coat of 620 Deep Sealer first. Firmly adhered bonded ingrain wallpaper (Raufaser) takes 660 directly. Vinyl or plastic-coated wallpaper is NOT a suitable substrate — strip or apply a dedicated wallpaper-replacement coat first.

Can I tint 660 to a custom colour?

Yes. 660 ships natural white and is tintable on site with LEINOS 668 Pigment Concentrate (compatible pigment range for water-based natural-resin emulsion). Standard contractor tinting practice. For project-specific shades, use Get Expert Advice above — we route to a tinted-sample workflow for architect approval.

How is 660 different from LEINOS 650 Interior White Paint?

Same natural-resin emulsion family, same TDS, same primer (620), same wash and breathability classes. 660 is the named natural-resin emulsion SKU — the binder chemistry is the brand story; 650 is the everyday interior white variant — the role is the brand story. Pick 660 when the brief calls out “natural-resin paint” or the architect’s packet quotes the binder; pick 650 when the brief reads “interior white wall paint” as a generic line item.

NATURAL RESIN EMULSION PAINT · ART. 660

The wall paint that breathes and washes — without the acrylic.

Name: Natural Resin Emulsion Paint
Brand: LEINOS
SKU: 660
Availability: InStoreOnly

LEINOS 660 — natural-resin emulsion paint for modern Indian interiors. Wet-scrub washable (Class 3, DIN EN ISO 11998). Vapour-permeable (Class 1, DIN EN ISO 7783-2). Solvent-free. Made in Germany by Reincke Naturfarben since 1985.

Natural resin binderWashable · scrub Class 3Vapour-permeable · Class 1VOC <1 g/l

Download TDS

Mechanism & Use

How 660 natural-resin emulsion paint works.

Plant-derived natural resin binds the paint film instead of synthetic acrylic polymer. The mineral fillers carry opacity and matt depth. The film stays open-pore enough to let the wall breathe — and dense enough to wash. Conventional acrylic emulsion gives up one for the other.

Natural-resin binder, not acrylic

Plant-derived natural-resin emulsion (rosin-ester family) replaces synthetic acrylic polymer as the film-forming binder. Sits inside the LEINOS natural-materials canon — the same brand position as the linseed-oil wood-finish line.

Vapour-permeable — Class 1 (DIN EN ISO 7783-2)

Highest EU classification. The cured film stays open-pore — water vapour passes freely in both directions. Acrylic emulsion traps moisture between polymer film and plaster: the failure mode behind monsoon-cycle blistering.

Washable wet-scrub — Class 3 (DIN EN ISO 11998)

TDS explicit. Damp cloth or mild detergent handles kitchen splashback, hallway scuffs, bedroom corridor maintenance. Breathability is not given up for washability — both simultaneous, which acrylic emulsion cannot do.

Mineral plaster, gypsum board, bonded wallpaper

TDS explicit on substrate range. Modern Indian apartments mix substrates: lime and cement plaster, gypsum board, bonded ingrain wallpaper. 660 covers all three; chalking or highly absorbent surfaces get LEINOS 620 Deep Sealer first.

The Chemistry, In Plain Words

660 sits in the category contractors and architects already understand: a water-based interior emulsion that goes on with a brush or roller, dries in 16-24 hours, recoats the next day, and reaches full performance within a week. The difference is the binder — where conventional acrylic emulsion uses a synthetic polymer dispersion (styrene-acrylate or pure acrylic), 660 uses a plant-derived natural-resin emulsion as the film-forming binder. Mineral fillers (calcium carbonate, titanium dioxide, silicate body) carry the opacity and matt depth.

The film cures by water evaporation — natural-resin droplets coalesce into a continuous matrix dense enough to handle wet-scrub Class 3 cleaning (DIN EN ISO 11998), yet open-pore enough that water vapour passes through freely (Class 1, DIN EN ISO 7783-2). Acrylic emulsion trades breathability for washability; 660 carries both simultaneously — the principal technical claim. Substrate range: sound mineral plaster takes 660 directly; gypsum board and bonded ingrain wallpaper take 660 over LEINOS 620 Deep Sealer for absorbent or chalking zones. For active-mould-risk humid bathrooms and basement walls, specify LEINOS 665 Lime Paint instead — alkaline lime chemistry suppresses mould on the surface, where 660’s natural-resin film does not.

Where It Lives

Where 660 Lives

See real projects with 660

Modern Bangalore + Mumbai apartment interiors

Mid-mod fit-outs, contemporary residential remodels, the everyday Indian apartment substrate stack — mineral plaster, gypsum board partition walls, bonded wallpaper feature walls. 660 over 620 primer (where the wall is chalking or highly absorbent) reads as a soft matt natural-finish wall that behaves the way premium European interior paint is supposed to.

Bedrooms, nurseries, and living rooms with breathability concerns

Solvent-free, very low VOC (<1 g/l Cat. a). No off-gassing window comparable to solvent-based or high-VOC acrylic emulsion paints, no acrylic plastic film between occupant and substrate. Paint Thursday, sleep in the room Friday — the contractor pain of two-week off-gassing windows with conventional emulsion does not apply.

Kitchens, hallways, and high-traffic interior walls

Wet-scrub washable Class 3 (DIN EN ISO 11998). The cleanable wall paint without the acrylic polymer film. Kitchen splashback zones around the stove, hallway scuff zones, bedroom corridors with regular hand-print exposure — all within standard interior wall paint maintenance frequency (damp-cloth wipe, mild detergent for marks).

Studios, offices, co-working interiors, art galleries

Matt finish with even hiding power and natural mineral-loaded depth — the wall reads as wall, not as a plastic surface. The non-glare matt suits art display lighting and architectural photography. Repaint cycle aligned with conventional interior emulsion frequency.

Restored shell apartments + heritage-building modern fit-outs

Mixed-substrate walls — original lime plaster patches alongside modern gypsum board partition repairs. 620 primer first evens the absorbency canvas; 660 then goes on as a unified contemporary matt natural-finish wall across the substrate mix.

Wellness studios + yoga shalas where 665 is too humid-room-specific

Where the wellness register demands a natural-chemistry wall paint but the specific lime-paint humid-room canon does not apply — dry meditation rooms, treatment rooms, reception interiors. 660 carries the natural-resin binder story without the alkaline lime-paint workflow that requires substrate know-how.

See real projects with 660

Compliance · Natural Ingredients · EU

Documented natural-resin chemistry. Cat. a VOC. No synthetic acrylic polymer.

Three anchors that let architects specify 660 for residential and commercial interiors without the acrylic-polymer disclosure.

EU Compliance

VOC <1 g/l

EU limit 30 g/l · Cat. a interior matt walls (water-borne) · Directive 2004/42/EC.

InVeNa — Initiative Verband nachhaltige Baustoffe

Institutional Pledge

InVeNa Member

Reincke Naturfarben — full-ingredient-disclosure pledge for natural building products.

Origin

Made in Germany

Manufactured by Reincke Naturfarben, Lower Saxony, est. 1985.

The TDS is downloadable below. Where you need a written specification packet — full ingredient declaration, VOC compliance letter for an architect’s submittal, substrate-compatibility statement for a mixed-substrate apartment fit-out, or a low-emission performance brief for a nursery or wellness interior — it is available to architects and contractors on request. Use Get Expert Advice above.

Read The Full TDS

Step by Step

How to Apply

Substrate inspection — wall must be dry, free of dust and grease, moderately absorbent, free of efflorescence and fungi. Strip distemper completely; remove flaking paint. Dense existing coatings (latex emulsion, lacquer) must be sanded to break the glossy seal. New base plasters cured 2-3 weeks. Strongly alkaline fresh substrates must be neutralised before painting.
Prime new plaster, drywall, and highly absorbent surfaces with LEINOS 620 Deep Sealer per leinos.de. For sound, firmly adhering existing emulsion coatings or new unpainted wallpaper, primer is not required — apply 660 directly. For chalking old paint, very porous cement, or mixed-substrate shells, 620 first evens the absorbency canvas.
Stir well before use until the mineral fillers are fully dispersed and the colour reads uniform. Supplied ready-to-use; no thinning required per official specification. For custom shades, tint with LEINOS 668 Pigment Concentrate during preparation.
First coat — apply by brush, roller, or airless spray at room temperature above 12 °C (leinos.de). Airless: nozzles 0.38-0.43 mm, spray angle 30°-40°, filter 100-50 mesh. Regular overlapping strokes; on roller, finish with light vertical strokes to even the stipple. Full hiding power typically achieved with two coats per official specification.
Second coat after 16-24 hours at 20 °C / 50% RH (longer at lower temperature or higher humidity). Apply the second coat the same way as the first. Brings the wall to its full uniform matt opacity and the characteristic depth of mineral-loaded natural-resin emulsion.
Finished surface. The paint reaches its full matt finish and uniform hiding power once the second coat is dry. Wet-scrub Class 3 washable performance (DIN EN ISO 11998) develops over the following week. The cured wall accepts damp cloth + mild detergent for marks — no abrasive scrub pads. Clean tools immediately after use with water.

Application Conditions

Substrate must be dry, free of dust and grease, moderately absorbent but stable, and free of separating agents, cracks, efflorescence, and fungi.
Strongly alkaline substrates must be neutralised before application.
Ambient and surface temperature above 8 °C minimum (TDS); LEINOS recommends ≥12 °C for natural-resin emulsion film formation.
Ensure good ventilation during application and the first 24 hours of drying.

Coats & Recoating

2 coats typical · 3rd coat for strong colour shifts or very dark substrates.
Recoatable after approximately 16–24 hours (at 20 °C / 50% RH).
Drying time depends on temperature, humidity, ventilation, and substrate absorbency.

Cleaning & Storage

Clean tools immediately after use with water.
Store cool, dry, and frost-free. Keep container tightly closed. Shelf life: at least 12 months in original sealed container.

Airless Spray

Airless: Nozzles 0.38–0.43 mm. Spray angle approx. 30°–40°. Filter approx. 100–50 mesh. Per leinos.de official specification.

First time with Natural Resin Emulsion Paint? Our technical team runs complimentary on-site walkthroughs for contractors — full application protocol, start to finish.

System & Substrates

The natural-resin emulsion topcoat for interior absorbent walls.

Two coats of 660 over sound mineral plaster, gypsum board, or bonded wallpaper — with 620 Deep Sealer first if the substrate is chalking, highly absorbent, or mixed. Contractor-familiar workflow; natural-chemistry binder.

The Coating System

Primer plus topcoat — the full chain.

Primer Coat (optional)620Deep Sealer

Natural-Resin Emulsion Topcoat660Natural Resin Emulsion Paint

Tinting On Site

Mix your own custom shade at the site with LEINOS pigments.

On-Site Tint668Pigment Concentrate

Substrate Fit

660 works on — and what it doesn’t.

Suitable

Recommended substrates

Lime plaster (modern + restored shell apartments, cured 2–3 weeks)
Cement plaster + cement render (residential, commercial, after 2–3 week cure)
Gypsum board / drywall (sound, absorbent; lightly primed if factory-finished)
Bonded ingrain wallpaper (Raufaser, firmly adhered)
Absorbent firmly-adhering existing interior coatings (sound, non-chalking matt finish)

Honest Limits

Where to use a different product

Exterior surfaces — use LEINOS exterior facade paints.
Permanently wet or submerged areas — bathroom shower stalls, basement walls below waterline. Use a dedicated wet-room coating.
Vinyl or plastic-coated wallpaper — strip or replace before painting.
Non-absorbent, glossy, or lacquered surfaces — strip back to the substrate, or mechanically key (sand) and prime with LEINOS 620 Deep Sealer
Strongly alkaline fresh substrates — neutralise first before applying 660.
Active-mould-risk humid bathrooms and kitchens — the alkaline lime chemistry suppresses mould growth on the surface, where 660 natural-resin film does not. Use LEINOS 665 Lime Paint

Use With Care

Working safely with 660

Store away from children. Keep the pail closed and out of reach when not actively in use.
Avoid contact with eyes, skin, and clothing. Wash any splashes with plenty of water and soap immediately. Use standard painter’s gloves and eyewear during application.
Ensure adequate ventilation during application and the first 24 hours of drying — open windows and run room fans on low if the room has no cross-ventilation.
Dispose of dried product residues with household waste; dispose of liquid residues per local hazardous-waste regulations. Disposal code: EAK/EWC 08 01 12.
Safety Data Sheet (SDS) is available on request from LEINOS India for the full hazard register and regulated label statements.

Coverage & Pack Sizes

Natural Resin Emulsion pack sizes: two coats per wall, 54–108 sq ft/L.

Coverage on the card assumes one coat. Two coats are the canonical specification. Plan an extra coat for strong colour shifts or very dark substrates.

Most Specified

2.5L

Covers

70–135 sq ft

2 coats, absorbent mineral

Best For

Single feature wall, accent area, or small bedroom.

10L

Covers

270–540 sq ft

2 coats, absorbent mineral

Best For

Full room, full apartment, or multi-room project.

Coverage Calculator

sq ft

Enter your floor area to see how many litres — and the most efficient pack mix — you’ll need for 2 coats.

Documented Applications

See this product in real projects

Documented mineral surface projects. Captions show which LEINOS finish was used.

Mineral Surface

Sage Green Painted Walls in Living Room

Mumbai, Maharashtra

Finished with 665

View project

Mineral Surface

Colourful Giraffe Mural on Lime-Painted Wall

Visakhapatnam, Andhra Pradesh

Finished with 665

View project

Mineral Surface

Bathroom Walls with Anti-Mould Lime Paint

Coimbatore, Tamil Nadu

Finished with 665

View project

Mineral Surface

Warm-Toned Textured Lime Paint Walls

Pune, Maharashtra

Finished with 665

View project

See all projects with 660

Full Declaration

Composition

Every ingredient declared on the label. The Trust Hub explains what each one does and the standards behind it.

Natural-Resin Emulsion Binder
Plant-derived natural resin (rosin-ester family per master TDS pattern), emulsified in water — the film-forming binder. Replaces synthetic acrylic polymer in conventional emulsion paint.
Mineral Fillers + Pigments
Calcium carbonate, titanium dioxide (white pigment), and additional mineral fillers — provide opacity, matt depth, and the wall’s interlock with absorbent substrate pores. Inert, REACH-compliant.
Plant-Derived Stabilisers
Cellulose or similar plant-derived rheology modifiers — keep the natural-resin emulsion and mineral fillers in uniform suspension in the pail. Burn out as the paint cures.
Mild Additives
Functional additives at trace levels (preservative, defoamer, wetting agent). The 660 SDS is supplied on request from the manufacturer for the full chemistry disclosure.

Got Questions?

Frequently Asked

Quick answers on formulation, application and Indian-climate suitability. Pulled from our full FAQ and TDS library.

: It depends on the condition. Sound, non-chalking, well-bonded dispersion coatings can usually be primed with LEINOS Mineral Plaster Primer 622 first — the primer creates a uniform mineral base for the topcoat. Flaking, chalking, or oil-based finishes must be fully removed back to a sound mineral substrate.
: Yes. LEINOS mineral wall paints are fully breathable (vapour-permeable), allowing moisture to pass through the wall structure naturally.
: The surface must be clean, dry, and structurally sound. New plaster must be fully cured (typically 4 weeks). Prime with the recommended mineral primer.
: The film-forming binder. Conventional emulsion uses synthetic acrylic polymer (styrene-acrylate or pure acrylic); 660 uses a plant-derived natural-resin emulsion. Workflow is identical — apply, dry, recoat, wash. Result: a wall that washes the same way but breathes more (Class 1 vapour-permeability vs typical Class 2-3 for acrylic). Sits inside the LEINOS natural-materials canon.
: Depends on the wall and the room. For everyday modern apartment interiors — living rooms, bedrooms, offices, studios — 660 is the standard: contractor-familiar, washable, breathable. For heritage walls, humid bathrooms and kitchens with active mould risk, conservation interiors, and traditional lime-plaster substrates — 665. Alkaline lime chemistry suppresses mould on the surface; 660’s natural-resin film does not.
: Conditional. If the existing acrylic is sound, firmly adhering, matt-finish, absorbent — clean + dust-free + mild abrasion to dull any sheen, then 660 goes over directly. If glossy, lacquered, or flaking, mechanically key the wall and prime with LEINOS 620 Deep Sealer, or strip back to substrate. Strongly alkaline freshly skimmed walls must be neutralised before painting.
: Yes — TDS explicit on both. Sound, absorbent gypsum board takes 660 directly; very smooth factory-finished sheets accept the paint better with a coat of 620 Deep Sealer first. Firmly adhered bonded ingrain wallpaper (Raufaser) takes 660 directly. Vinyl or plastic-coated wallpaper is NOT a suitable substrate — strip or apply a dedicated wallpaper-replacement coat first.
: Once the second coat is dry to touch — typically 6-12 hours at 20 °C / 50% RH, longer at higher humidity. Solvent-free, very low VOC (<1 g/l Cat. a), no off-gassing window comparable to solvent-based or high-VOC acrylic. Paint Thursday, sleep Friday. Ventilate normally during application and the first 24 hours.
: Yes. 660 ships natural white and is tintable on site with LEINOS 668 Pigment Concentrate (compatible pigment range for water-based natural-resin emulsion). Standard contractor tinting practice. For project-specific shades, use Get Expert Advice above — we route to a tinted-sample workflow for architect approval.
: Same natural-resin emulsion family, same TDS, same primer (620), same wash and breathability classes. 660 is the named natural-resin emulsion SKU — the binder chemistry is the brand story; 650 is the everyday interior white variant — the role is the brand story. Pick 660 when the brief calls out “natural-resin paint” or the architect’s packet quotes the binder; pick 650 when the brief reads “interior white wall paint” as a generic line item.