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AT 311 Grey cement-lime plaster for machine application

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For machine-applied internal and external plaster coatings of surface class III and CS II compressive strength, on walls and ceilings, regardless of humidity inside rooms. Provides an excellent underlay for ceramic lining, decorative plaster, finish coat and paint. With its fungus-resistant properties, especially recommended for demanding sanitary areas. Recommended plaster coat thickness from 10 to 25 mm. The plaster can also be applied by hand. Granularity up to 1.0 mm.

Package
Single: 25 kg bag

£13.20

Substrate type
Walls made of ceramic and silicate bricks and blocks as well as of cellular concrete blocks. Walls and ceilings made of concrete and concrete elements. Old, not weathered cement-lime plaster.

Substrate preparation
The substrate must be clean, sound, dry and free from dirt, dust and greasy spots. Clean old and sound plaster of paint coats, open the cracks, patch irregularities and pits with ALPOL AZ 130 quick-setting or ALPOL AZ 135 levelling mortar. Strengthen weak surfaces with ALPOL AG 700 deep-penetrating primer, treat highly absorbing substrates with ALPOL AG 708 primer for absorbing surfaces or apply a scratch coat of ALPOL AT 303. Moisten dry substrate with plenty of water before applying the scratch coat. Treat concrete surfaces with ALPOL AG 702 primer or apply an initial scratch coat of ALPOL AT 303. In spots where cracks can be expected to occur, such as different materials one next to another and opening corners, apply reinforcing glass fibre mesh with mesh size at least 8 x 8 mm, embedded in ALPOL AZ 130 quick-setting or ALPOL AZ 135 levelling mortar or directly in the plaster. When applying the plaster on a substrate coated previously with a scratch coat of ALPOL AT 303, allow at least 2-day process break, and, before plaster application, moisten the surface along with the scratch coat using water.

Instructions for use
Use plaster units to apply the plaster onto the entire area to be worked on during one working cycle. Process the plaster in two stages. First, apply the plaster onto the surface, skim with H-type darby, patch any dents and level out the entire surface. Leave the surface treated that way for around 6-24 hours (depending on substrate absorption, weather conditions and plaster coat thickness) until initial plaster setting. The works can be resumed when the plaster has set cured that it becomes “dusty” when skimming with the darby is continued, and no fresh material is “torn” out of the surface. When resuming the work too late, the plaster will have set too much which will make it difficult to work, require more work and might make it impossible to achieve the right finish. In the second stage, level the surface carefully cutting the excess of plaster with a trapezoidal darby. Then sprinkle the levelled surface with water and finish the surface with a polystyrene float. To achieve fine structure, finish the plaster with the use of dry float with fine and soft sponge or felt. Use a power trowel to get an ideally smooth and even finish.
Apply the plaster in two coats if it is required to be thicker than recommended. Apply the first coat as a basecoat, level with a darby and leave until fully cured (at least 7 days per every centimetre of thickness), protecting from excessive drying in the first day. Moisten the basecoat (underlay plaster) with plenty of water before applying the second coat.

Tools
Plaster unit, power trowel, floats and darbies, trowel, bubble level, container for mortar.

Working conditions
Work in ambient temperatures between +5°C and +25°C. Do not add any other agents. Protect fresh plasterwork from excessive drying and moisture. Do not use electrical heaters (to avoid shrinkage cracks) or gas heaters (to avoid shrinkage and carbonisation process)

Storage
Store in original, unopened packages in dry place – shelf life 12 months from production date. Protect from moisture during transport and storage.

Notes
The specifications and instructions for use are based on the temperature (20±2)°C and relative air humidity (65±5)%. The workability may vary in different conditions. Irritating to eyes and respiratory system. Appropriate eye, respiratory and skin protection measures should be used. Becomes alkaline after mixing with water. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Keep away from children. Use water to remove fresh dirt or ALPOL AI 770 cleaner to remove hardened dirt. The manufacturer assumes no liability for damage resulting from improper or inappropriate use of the product..

General recommendations
Work according to building practice, observing health & safety standards and regulations.

Specifications
Composition: blend of cement, lime, sand, mineral admixtures and additives
Bulk density approx. 1.5 kg/dm³
Appropriate amount of water* approx. 4.5 dm³/25 kg
Workability approx. 1 h from mixing with water
Fresh plaster pumping interval up to 30 min
Adhesion ≥ 0.25 MPa
Fire resistance class A1
Chloride content ≤ 0.1% Cl
Granulation up to 1.0 mm
Yield approx. 18 dm³ out of 25 kg
Coverage approx. 1.3 kg/m²/mm

Description

For machine-applied internal and external plaster coatings of surface class III and CS II compressive strength, on walls and ceilings, regardless of humidity inside rooms. Provides an excellent underlay for ceramic lining, decorative plaster, finish coat and paint. With its fungus-resistant properties, especially recommended for demanding sanitary areas. Recommended plaster coat thickness from 10 to 25 mm. The plaster can also be applied by hand. Granularity up to 1.0 mm.

Package
Single: 25 kg bag

Additional information

Weight 30 kg

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