Painting Interior Walls

TUTORIAL 1:

PAINTING INTERIOR WALLS

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Determining your product requirement:

• Measure the surface area you wish to
• Determine which products are needed for the surface you wish to paint and the finish you wish to achieve.
• Check the Theoretical Spread Rates (TSR) on each of the specified products and see how many coats of each are recommended, then calculate what quantities of each product you will require, remembering to make adjustments for the porosity for each surface. TSRs are based on products applied to smooth, sealed (E.g. an unsealed scratch plaster surface will absorb more paint than a sealed smooth one, so allow for a lower spread rate on porous surfaces).
• Check out the specifications on all the top coat choices (referring to the relevant data sheets) and decide which is right for

INTERIOR WALLS

SMOOTH PLASTER PREVIOUSLY PAINTED IN ACRYLIC

Surface Preparation

1. Remove all loose peeling paint if
2. Where paint has been removed, feather the edges of remaining paint to zero with sand paper. Remove sanding
3. Wash wall down to remove all dirt, dust and any other Allow to dry.

Application Method

1. If peeling paint has been removed exposing gypsum plaster then prime exposed gypsum plaster only with 1 coat of RhinoSeal. Allow to dry between coats.
2. If peeling paint has been removed exposing cement plaster then prime exposed cement plaster with 1 coat

AcrySeal diluted 1:1 with water. Allow to dry.

3. Apply 2 top coats of your choice, allow to dry between

Relevant Product Information

RhinoSeal
Theoretical Spread Rate	15m² per litre
No. of Coats required	1 coat
Application Method	Brush, Roller or Spray
Drying Time	1 hour before over coating

AcrySeal
Theoretical Spread Rate	15m² per litre
No. of Coats required	1 coat
Application Method	Brush, Roller or Spray
Drying Time	45 min @ 25°C per coat

Top Coat Choices

Elegance (Matt or Silk)
Theoretical Spread Rate	8-10m² per litre
No. of Coats required	2 Coats minimum (Exterior use)
Application Method	Brush, Roller or Spray
Drying Time	45 min @ 25°C per coat

Essence
Theoretical Spread Rate	8m² per litre
No. of Coats required	2 coats minimum
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C ± 45 minutes per coat.

Pristina
Theoretical Spread Rate	New Plaster: 4-5m² per litre
	Painted Smooth Plaster: 7-8m² per litre
No. of Coats required	2 Coats (Exterior use)
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 45 minutes

EnviroCoat (Gloss Acrylic)
Theoretical Spread Rate	10m² per litre
No. of Coats required	2 Coats (Exterior use)
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 45 minutes

If you wish to use a textured finish Paintcor has 3 exciting products for you, SatinTex, GranTex and RippleTex. Please call our technical department for advice on application before making a choice.

SMOOTH PLASTER PREVIOIUSLY PAINTED IN ENAMEL

Surface Preparation

1. Remove all loose peeling paint if
2. Where paint has been removed, feather the edges of remaining paint to zero with sand paper. Remove sanding dust
3. Wash wall down to remove all dirt, dust and any other Allow to dry.
4. Sand existing enamel to a smooth matt Remove sanding dust.

Application Method

1. If peeling paint has been removed exposing gypsum plaster, then prime exposed gypsum plaster only with 1 coat of RhinoSeal. Allow to
2. If peeling paint has been removed exposing cement plaster then prime exposed cement plaster with 1 coat AcrySeal diluted 1:1 with water. Allow to
3. If finishing in Acrylic then undercoat all areas where paint has been removed and sealed with 1 coat of

UniSub universal undercoat. Allow to dry, then apply acrylic of your choice.

3. If finishing in Elegance or EnviroCoat Acrylic then no UniSub is required prior to painting.

Relevant Product Information

RhinoSeal
Theoretical Spread Rate	15m² per litre
No. of Coats required	1 coat
Application Method	Brush, Roller or Spray
Drying Time	1 hour before over coating @ 25 degrees C

AcrySeal
Theoretical Spread Rate	10-15m² per litre
No. of Coats required	1 coat
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 45 minutes

UniSub
Theoretical Spread Rate	8m² per litre
No. of Coats required	1 coat
	New Doors 2 Coats
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 1 hour surface dry
	@ 25°C – 5 hours hard dry ( over coat)

Top Coat Choices

EnduraCoat
Theoretical Spread Rate	9m² per litre
No. of Coats required	1 coat
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 3 hour surface dry

HiGlo
Theoretical Spread Rate	10m² per litre
No. of Coats required	2 coats (Exterior use)
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 2 hour surface dry
	@ 25°C – 7 hours Hard Dry (over coat)
Elegance (Matt or Silk)
Theoretical Spread Rate	8 – 10m² per litre
No. of Coats required	2 coats minimum (Exterior use)
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 45 minutes surface dry

EnviroCoat
Theoretical Spread Rate	10m² per litre
No. of Coats required	2 coats minimum (Exterior use)
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 1 hour

INTERIOR WALLS (UNPAINTED) NEW GYPSYM PLASTER (RHINOLITE)

Method #1: Using PlasterPrime (for good quality gypsum plaster only) Surface Preparation:

New Gypsum Plaster (Rhinolite)

1. Ensure gypsum plaster is dry and of good quality, i.e. the surface is hard and free of chalk. Note: If the chalky powder remains after wiping, Paintcor’s RhinoSeal must be applied in place of PlasterPrime to ensure the complete binding of the chalking gypsum
2. Wipe good quality gypsum plaster down to remove all dirt and

Application Method:

1. Apply 1 coat of PlasterPrime premium (water base) or Plaster prime Trade (solvent base) to all gypsum surfaces to be Allow to dry for 2 hours @ 25 degrees C.
2. Apply 2 coats of the top coat of your Allow to dry between coats.

Method #2: Using RhinoSeal (for chalking gypsum plaster) Surface Preparation:

1. Wipe walls down to remove all dirt and dust.

Application Method:

1. Apply 1 coat RhinoSeal directly to gypsum plaster (Rhinolite) wall with a brush, roller or airless spray. Allow 2 hours to
2. Check if substrate is properly bound (i.e. no chalking gypsum plaster). If there is still chalk on the surface then apply a second coat of RhinoSeal. Allow 2 hours to dry between and after
3. Overcoating with 1 coat of AcrylUnder (for acrylic top coats, allow 30 minutes to dry) or 1 coat of UniSub Universal undercoat (for Enamel top coats allow 12 hours to dry).
4. Finally apply Acrylic top coats over AcrylUnder or Enamel top coats over UniSub Universal Undercoat. Allow to dry between coats.

Relevant Product Information

PlasterPrime Premium
Theoretical Spread Rate	12-15 m² per litre
No. of Coats required	1 coat
Application Method	Brush, Roller or Spray
Drying Time	6 hours @ 25°C

RhinoSeal
Theoretical Spread Rate	15m² per litre
No. of Coats required	1 – 2 coats.
Application Method	Brush, Roller or Spray
Drying Time	1 hour @ 25°C

AcrylUnder
Theoretical Spread Rate	5-6m² per litre
No. of Coats required	1 coat
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 45 minutes

Top Coat Choices

Elegance (Matt or Silk)
Theoretical Spread Rate	8 – 10m² per litre
No. of Coats required	2 Coats minimum (Exterior use)
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 45 minutes

EnviroCoat
Theoretical Spread Rate	10m² per litre
No. of Coats required	2 Coats (Exterior use)
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 1 hour

Pristina
Theoretical Spread Rate	New plaster: 4-5m² per litre
	Old Painted Smooth Plaster: 7-8m² per litre
No. of Coats required	2 Coats (Exterior use)
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 45 minutes

Essence
Theoretical spread rate	8 square meters/ litre
No. of coats required	2 coats (exterior use)
Application method	Brush, roller or spray.
Drying time	@ 25°C – 45 minutes

EnduraCoat
Theoretical Spread Rate	9m² per litre
No. of Coats required	1 Coat
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 3 hours to Touch Dry

HiGlo
Theoretical Spread Rate	10m² per litre
No. of Coats required	2 Coats (Exterior use)
Application Method	Brush, Roller or Spray

Drying Time	@ 25°C – 2 hours Surface Dry
	@ 25°C – 7 hours Hard Dry

LoGlo
Theoretical Spread Rate	10m² per litre
No. of Coats required	2 Coats (Exterior use)
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 2 hours surface dry
	@ 25°C – 7 hours hard dry.

NEW CEMENT PLASTER

Surface Preparation

1. Ensure plaster is dry and of good quality. Poor quality plaster (plaster that continues to release loose

particles when brushed) must be sealed using Paintcor’s AcrySeal and not PlasterPrime.

Application Method

1. Apply 1 coat of Paintcor’s PlasterPrime Premium or Trade to new plaster to be painted. Allow to dry for 6 hours @ 25°C
2. Finally apply 2 coats of the top coat of your choice, allow to dry between

Where PlasterPrime Should Be Used:

PlasterPrime should be used on all new good quality plaster, especially below D.P.C and after the application of

Paintcor’s KlinkaSeal to stop rising damp.

Please Note: AcrySeal must be used in place of Plaster Prime on new under bound plaster to completely bind and seal the new plaster before painting. Do not apply Plaster primer to under bound (friable) plaster. Any new plaster can also be sealed with AcrySeal before painting. AcrySeal will give a firm, alkali resistant base for subsequent coats to adhere to.

Relevant Product Information

PlasterPrimer Premium
Theoretical Spread Rate	12-15m² per litre
No. of Coats required	1 Coat
Application Method	Brush, Roller or Spray
Drying Time	6 hours @ 25°C

KlinkaSeal
Theoretical Spread Rate	15m² per litre

No. of Coats required	2 Coats
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 48 hours before over coat with Plasterprime.

AcrySeal
Theoretical Spread Rate	10-15m² per litre
No. of Coats required	1 Coat
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 45 minutes

AcrylUnder
Theoretical Spread Rate	5-6m² per litre
No. of Coats required	1 Coat
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 45 minutes

NEW WOOD FLOATED CEMENT PLASTER WITH TEXTURE DIFFERENCES

Surface Preparation

1. Brush plaster to remove loose friable particles.

Application Method

1. Apply 1 coat of AcrySeal, diluted 1:1 with water, directly to plaster with a brush, roller or airless spray. Allow to dry.
2. Apply 1 coat of Paintcor’s SubTex with a sponge roller (for a ripple finish to cover excessive scaring) or a sheepskin roller (for a semi-textured finish to cover texture differences). Allow to
3. Apply top coats of choice.

Relevant Product Information

AcrySeal
Theoretical Spread Rate	10-15m² per litre
No. of Coats required	1 Coat
Application Method	Brush, Roller or Spray
Drying Time	25°C – 45 minutes

Subtex
Theoretical Spread Rate	Ripple Roller: 3m² per litre
	Sheep Skin Roller: 4.5 – 5m² per litre
No. of Coats required	1 Coat, 2 Coats if necessary
Application Method	Brush, Roller
Drying Time	@ 25°C – 1 hour

Top Coat Choices

Elegance (Matt or Silk)
Theoretical Spread Rate	8 – 10m² per litre
No. of Coats required	2 Coats minimum (Exterior use)
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 45 minutes

EnviroCoat
Theoretical Spread Rate	10m² per litre
No. of Coats required	2 Coats (Exterior use)
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 1 hour

Pristina
Theoretical Spread Rate	New plaster: 4-5m² per litre
	Old Painted Smooth Plaster: 7-8m² per litre
No. of Coats required	2 Coats (Exterior use)
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 45 minutes

Essence
Theoretical spread rate	8 square meters/ litre
No. of coats required	2 coats (exterior use)
Application method	Brush, roller or spray.
Drying time	@ 25°C – 45 minutes

NEW SCRATCH PLASTER

Surface Preparation

1. Brush plaster to remove loose friable particles.

Application Method

1. Apply 1 liberal coat of Paintcor’s SealerMix directly to plaster with a brush, roller or airless spray. Allow to
2. Apply 1 coat of Paintcor’s AcrylUnder with a brush, roller or airless spray. Allow to dry. If the desired finish is achieved after application of SealerMix, then top coats can be applied straight over SealerMix without the use of
3. Apply top coats of your

Relevant Product Information

SealerMix
Theoretical Spread Rate	8m² per litre
No. of Coats required	1 liberal Coat
Application Method	Brush, Roller or Spray
Drying Time	Allow 45 minutes before overcoat

AcrylUnder
Theoretical Spread Rate	5-6m² per litre
No. of Coats required	2 Coats minimum
Application method	Brush, roller or spray.
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 45 minutes

Top Coat Choices

Elegance (Matt or Silk)
Theoretical Spread Rate	8 – 10m² per litre
No. of Coats required	2 Coats minimum (Exterior use)
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 45 minutes

EnviroCoat
Theoretical Spread Rate	10m² per litre
No. of Coats required	2 Coats (Exterior use)
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 45 minutes

Pristina
Theoretical Spread Rate	New plaster: 4-5m² per litre
	Old Painted Smooth Plaster: 7-8m² per litre
No. of Coats required	2 Coats (Exterior use)
Application Method	Brush, Roller or Spray
Drying Time	@ 25°C – 45 minutes

Essence
Theoretical spread rate	8 meters square/ litre
No. of coats	2 coats (outside use)
Application method	Brush, roller or spray.
Drying time.	45 minutes @25 degrees C.

See also:

Plaster Primer Archives