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Add water, lay it on bare masonry, leave it alone.

A two-person team covers 250 to 300 sq ft in a day. The only habit to unlearn is water curing.

Method

Six steps, start to finish.

Prepare the surface
Brush the masonry clean of dust, loose mortar and oil.
Dampen, do not soak
Sprinkle the wall evenly about an hour before you start.
Mix with soft water
10–11 litres per bag. Powder into water, paddle smooth, stand five minutes, remix.
Lay the first pass
A 6–7 mm coat, bottom to top. Scratch it lightly while green.
Lay the finish pass
Bring it to 10–12 mm, rule it flat, and close the face with the trowel as it stiffens.
Leave it to cure
Firm in 3–4 hours, cured in 2–3 days. Ventilate. Do not water cure.

Work out your own job

How many bags, and what it saves you.

An estimate for planning, not a quotation.

A 1,200 sq ft house has roughly 3,000–3,500 sq ft of internal wall.

Bags of Gau Plaster
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Material cost at ₹265 a bag
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Same wall, cement build-up
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You keep
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Assumptions: one 25 kg bag covers 18 sq ft at 10 mm; bags are ₹265 ex-works; the cement, putty and primer build-up costs about ₹14 more per square foot. Freight, taxes and labour excluded on both sides.

Four ways to get it wrong

Mistakes we would rather you did not make.

Do not water cure it
Masons do this by reflex because cement demands it. Gypsum sets by crystallising, and flooding it afterwards weakens the face. Ventilate the room instead.
Do not mix more than you can lay
Pot life is 45 to 60 minutes. Once it stiffens, adding water will not bring it back — it will just set weak.
Do not lay it over dust or old paint
It bonds to sound, clean masonry. Ten minutes with a wire brush saves the wall.
Do not store bags on the floor
Pallets or planks, dry covered store, away from the wall. Six months sealed; use an opened bag within a week.

Training

We will show your crew, free.

A half-day briefing for any contractor placing a first order in Karnataka, either at the Devanahalli plant or on your site. Mixing, the two-pass method, and why the curing routine is different. Ask for it when you enquire.

Book a briefing

Gau Plaster being mixed and laid onto a wall