PLASTERING MIXES ATLAS CEMENT SCRATCH COAT scratch coat for 2- or 3- coat plasterwork

• improves plaster adhesion to substrate

CLASS OF REACTION TO FIRE ACC. TO THE EUROPEAN PRODUCT CONFORMS WITH recommended for cement and cement-lime plasters THE EUROPEAN STANDARD • STANDARD • reduces the material cost of plasterwork • the highest strength category • manual or machine application

„„ Use „„ Technical data Creates adhesion layer in two- or three-coat plaster systems – applied directly to the ATLAS CEMENT SCRATCH COAT is manufactured in the form of dry mix substrate before the application of top coat of cement or lime-cement plaster. of highest quality cement binder, quartz fillers and modifiers improving Excellent compatibility with ATLAS plastering mortars: the plasticity and workability of the material. -- PLASTERING MORTAR, -- LIGHTWEIGHT CEMENT-LIME PLASTER Bulk density (of dry mix) ca. 1.57 kg / dm³ -- KB-TYNK Reduces the cost of two- or three-coat plasterwork – replaces more expensive plaster Wet density (after mixing) ca. 2.06 kg / dm³ types at the scratch coat stage. Hand or machine applied – the use of plastering units speeds up the application considerably. Dry density (after setting) ca. 1.6 kg / dm³

Types of substrates – walls and ceilings of bricks, blocks, hollow blocks and other Mixing proportions 0.22 l / 1 kg similar ceramic or silicate elements; concrete and aerated concrete; cement-bonded water / dry mix ca. 6.5 l / 30 kg particleboard, cement and cement-lime plasters. Scratch coat thickness ca. 4 mm „„ Properties Mortar preparation temperature, substrate and ambient temperature from +5°C to +25°C High strength – the highest standard-specified strength class CS IV (above during work 6.0 N/mm²) – the scratch coat is a suitable base for top coats, even those of high strength plastering mortars, as it is resistant to shrinkage stress occurring during the setting of Maturing time ca. 5 minutes mortars of that type. Pot life ca. 2 hours Excellent adhesion to substrate – especially recommended for smooth surfaces or substrates of low absorption capacity; bonds strongly to bricks, blocks etc. The mortar can be supplemented with so-called anti-frost additives allowing to carry out works at lowered temperatures, i.e. below +5°C – the new temperature „„ Technical requirements range of mortar application, the way of its preparation (especially the adjustment of ATLAS CEMENT SCRATCH COAT conforms to PN-EN 998-1 standard. EC the amount of water added), principles of carrying out works and the mortar setting Declaration of Performance No. 111/CPR. conditions must be accepted according to the guidelines of the manufacturer of the additive. The amount of the anti-frost agent depends on the content of cement in the mortar – the proportion of cement to fillers in ATLAS SCRATCH COAT is at 1:4. PN-EN 998-1:2012 (EN 998-1:2010) Note. The manufacturer of the mortar is in no way responsible for the effects and the quality of the anti-frost agents used. Factory made plastering mortar of specified For indoor and properties, general-purpose (GP) outdoor use

Compressive strength ≥ 6.0 N/mm²

Reaction to fire - class A1

Water absorption ≤ 0.40 kg/m2 min0,5

Adhesion 0.5 N/mm² - FP:B

Water-vapour permeability coefficient μ 22

Thermal conductivity coefficient 0.83 W/mK (λ ) (average tabular value P=50%) 10, dry

Durability. Compressive strength decrease after < 10 % freeze-thaw cycles

Durability. Mass decrement after freeze-thaw ≤ 3% cycles

Dry bulk density ≤1800 kg/m³

See: Material Safety Content of hazardous substances 150 www.atlas.com.pl Data Sheet (MSDS) PLASTERING MIXES PLASTERING MIXES

„„ Application „„ Consumption Substrate preparation Material consumption depends on the accuracy of surface covering. The substrate should be dry, stable, flat and capable of load bearing, i.e. sufficiently In the case of scratch coat covering the entire surface the material 2 sound, and cleaned of materials that might affect mortar adhesion, especially dust, dirt, consumption is ca. 8 kg of dry mix for 1 m . lime, oil, grease, wax, residues of release agents or paint. Insufficiently bound substrate „„ Important additional information fragments should be hammered off, whereas all loose or crumbling particles should be removed using a steel wire brush. Contacting edges of particleboards should be • Adjust the ratio of added water experimentally, following the desired reinforced prior to plastering using strips of stainless steel mesh. Corners and edges of consistency of the mortar, type of substrate and weather conditions. window and door reveals should be protected using galvanised steel corner profiles. If Inappropriate amount of water for mix preparation results in deteriora- necessary, substrates characterised by excessive absorption capacity should be primed tion of strength parameters of the scratch coat. with ATLAS UNI-GRUNT emulsion. • Tools must be cleaned with clean water directly after use. Difficult to remove residues of the set mortar can be removed with the ATLAS Mortar preparation SZOP agent. Pour the mortar from the bag into a clean container with the suitable amount of water • Irritant - contains cement. Irritating to respiratory system and skin. Risk (see Technical Data for proportions) and mix using a drill with a mixer (or in cement of serious damage to eyes. May cause sensitisation by skin contact. mixer) until homogenous. In the case of machine application - in a plastering unit. Leave Due to its form - powder, the product may cause mechanical irritation the mortar to rest for 5 minutes and then remix. The mortar is ready to use directly after of eyes and respiratory system. Keep out of reach of children. Do not mixing and should be used up within ca. 2 hours. breathe dust. In case of contact with eyes, rinse immediately with Application of scratch coat plenty of water and seek medical advice. Wear suitable protective The mortar is applied to the prepared substrate manually or mechanically, in a uniform clothing, gloves and eye/face protection. If swallowed, seek medi- coat, to the thickness of ca. 4 mm. Do not smooth or float the material. Leave the mortar cal advice immediately and show the container or label. Follow the to set initially (ca. 12 hours). After initial mortar setting the top plaster coat can be applied. instructions in the Material Safety Data Sheet. • The mortar must be transported and stored in tightly sealed bags, in Maintenance dry conditions (most preferably on pallets). Protect against humidity. Ensure appropriate room ventilation during drying. Protect external plasters from dry- Shelf life in conditions as specified is 12 months from the production ing too quickly. date shown on the packaging. Content of soluble chromium (VI) in ready-to-use mix - ≤ 0.0002%. „„ Packaging Paper bags: 30 kg Pallet: 1080 kg in 30 kg bags

The above information constitutes basic guidelines for the application of the product and does not release the user from the obligation of carrying out works according to engineering principles and OHS regulations. At the time of publication of this product data sheet all previous ones become void. Date of update: 2013-09-19

Product Data Sheets Catalogue 151