Crown RockMaster is a cement-based polymeric texture wall finish, crafted from the finest quality minerals, white cement, and polymers. It is designed for both decorative and protective purposes, offering a durable and aesthetically pleasing finish for interior and exterior walls.

Recommended Use:
Ideal for decorating and protecting interior and exterior walls.

Substrates:
Suitable for new or previously painted (sound) plaster, concrete, and cement rendering.

Advantages:

• Highly compatible with cementitious surfaces
• Effectively hides surface undulations and cracks
• Tough, textured, and durable finish
• Protects walls and plasters from heavy rains and wind
• Resistant to algae and fungus
• Excellent UV resistance
• Good workability and high durability

Conditions During Application:

• Minimum substrate temperature: 10°C
• Substrate temperature should be at least 3°C above the dew point of the air
• Good ventilation is required in confined areas to ensure proper drying

Colour Range:
White to pale cream base, which can be top-coated with over 11,200 shades in water-based finishes from our Dispensing Unit.

Pack Sizes:

• 30kg
• 5kg (for samples only)

Finish:
Available in 1mm, 2mm, and 3mm textured variants.

Shelf Life:
12 months if stored under cool and dry conditions.

Thinner & Equipment Cleaner:
Water

Mixing Ratio:
150 to 200ml of water for every 1kg of powder (4.5 – 6L water per 30kg bag of powder)

Mixing Instructions:

• Use 150 – 200ml of water for every 1kg of RockMaster powder in a clean plastic container.
• Add the RockMaster powder to the water slowly while stirring.
• Mix with a handheld electric mixer (recommended) or by hand until a homogeneous, lump-free paste is formed.
• Allow the paste to stand for 5 – 10 minutes to allow additives to dissolve completely.
• Remix for about 2 minutes. The mixture is now ready for application.

Pot-life:
60 – 80 minutes maximum. Mix only enough quantity to be applied within 2 hours.

Film Thickness:
1mm to 3mm depending on variant.

Drying Times:

• Surface dry: 1 hour max
• Recoatable/ Hard dry: 8 hours max

Application Data:
Apply using a stainless steel trowel and finish with a special plastic trowel or comb to create the final design texture (e.g., horizontal, vertical, circular). Crown offers a SUPPLY & APPLY service for this product. Contact our Call Centre for more details.

Spreading Capacity per Coat:

• 8 – 9 m²/ 30kg per coat for 3mm variant
• 9 – 10 m²/ 30kg per coat for 2mm variant
• 11 – 12 m²/ 30kg per coat for 1mm variant

The maximum spread rate per coat is achieved at minimum dry film thickness and vice versa.

Surface Preparation & Application:

• Dampen the surface to be plastered with clean water. Allow excess water to drain off.
• Once the surface is clean, apply RockMaster with a stainless steel trowel on the prepared plaster surface.
• Leave the surface to dry for 10 minutes.
• Make the desired pattern using a plastic/fibre trowel, moving uniformly to achieve the desired texture pattern and uniform leveling.
• Allow full curing (minimum 8 hours) before applying a suitable water-based topcoat of the desired color.

Precautions:

1. Ensure the surface where RockMaster is to be applied is plain and leveled.
2. Avoid applying RockMaster on surfaces subjected to continuous dampness.
3. Use the mixed material within 2 hours after adding water.
4. Wear protective clothing and eye goggles while mixing or applying RockMaster to avoid dust entering the eyes.

Availability:
Available from Crown Depots in Nairobi, Kisumu, Mombasa, Meru, Nyeri, Eldoret, Arusha, Mwanza, Dar es Salaam, Kigali, and through Crown Stockists.

Storage Conditions:
Store under cool, dry conditions away from direct sunlight, heat, and extreme cold.

Disclaimer: The recommendations contained herein are given in good faith to guide the user according to good painting practices. They are based on our tests and experiences and are believed to be accurate and reliable. No warranty/guarantee is implied by the recommendations contained herein, as conditions of use, application method, substrate, and cleanliness of the substrate are beyond Crown Paints Kenya PLC’s control. Technology may change over time, necessitating changes to this Technical Data Sheet (TDS). Crown Paints Kenya PLC reserves the right to amend the TDS without further notice. It is the user’s responsibility to ensure that the latest TDS is used for reference.