2 in 1 -GENERAL-PURPOSE ADHESIVE FOR FOAMED POLYSTYRENE, XPS BOARDS AND MAKING REINFORCED LAYER IN THERMAL INSULATION SYSTEMS

high adhesiveness
good vapour permeability
reinforced with microfibres
resistant to cracking
for rough and plastered walls
FOR INTERNAL AND EXTERNAL USE

USE

ATLAS HOTER U is a cement adhesive for fixing foamed polystyrene boards in ATLAS and ATLAS HOTER thermal insulation systems. ATLAS HOTER U can be used on typical mineral substrates such as concrete of all grades, aerated concrete, cement render, cement-lime render, sandstone, and rough surfaces made of bricks, blocks, hollow bricks and other similar ceramic or lime-sand materials. It is also suitable for surfaces covered with strongly adhering layers of façade paint or thin-layer render. It is suitable for indoor and outdoor use.

PROPERTIES

ATLAS HOTER U is a ready-to-use dry mix of top-quality cement binder, aggregates and modifying agents. It is efficient, convenient and easy to use. The mortar is characterised by very good workability and easy forming as well as increased adhesion, elasticity and vapour permeability. It is frost- and water-resistant.

SUBSTRATE PREPARATION

Board fixing The substrate should be stable, even and structurally sound i.e. strong enough; it should be free from anything that may weaken adhesion, in particular dust, dirt, lime, oil, fat, wax, remains of emulsion and oil paint. Before work commencement, clean the substrate (water under pressure) and, if necessary, use ATLAS UNI-GRUNT to reduce substrate’s excessive absorptivity. Prime also in case of such substrates as weak cement plasters, cement plasters and walls made of cellular concrete or slag concrete hollow bricks. Fill in larger irregularities and cavities with ATLAS LEVELLING MORTAR or ATLAS PLASTERING MIX. In case of adhesion of foamed polystyrene boards on weak substrates of bearing capacity that can hardly be determined (e.g. dusty, difficult to clean), it is recommended to make an adhesion test described in guidelines of the Building Research Institute no. 334/2002 “Jointless thermal insulation system of external building walls.” Reinforced layer preparation Before reinforced layer preparation, surface of foamed polystyrene boards should be even, clean, stable and de-dusted, if boards were ground after adhesion.

ADHESIVE PREPARATION

In order to prepare the adhesive, pour the whole content of the bag into a container with suitable amount of water (in proportion: 5.0÷5.5 l water for 25 kg of dry adhesive) and mix until homogenous. It is best to mix it mechanically, using a drill with a mixer. The mortar is ready to use after 5 minutes and after remixing. It maintains its properties for ca. 4 hours.

APPLICATION

Board fixing Apply ATLAS HOTER U adhesive on the inside of the board using the “strip-point” method. It consists of preparation of continuous circumferential block (at least 3 cm wide) at the edge of the board and even distribution of 6÷8 patches of 8÷12 cm in diameter on the whole surface. In total, apply so much to cover at least 40% of board surface (after striking down to the substrate, min. 60%) and ensure appropriate board and wall connection. Immediately after application of the mortar on the board, fix the board to the substrate by firm pressing and press down so that mortar thickness under the board does not exceed 1 cm. In case of even and smooth substrates, the mortar can be evenly distributed using a notched float on the whole board surface to ensure 2÷5 mm layer thickness. If additional thermal insulation fixing using fasteners is required, begin not earlier than 24 hours after board fixing. Reinforced layer preparation Begin preparation of the reinforced layer 3 days (on average) after adhering foamed polystyrene boards and after possible preparation of additional mechanical fastening. Distribute ATLAS HOTER U on the surface of adhered insulation using a notched float and set a reinforcing mesh of glass fibre in the mortar. Set vertical strips of the mesh and float so that it is not visible and does not directly contact foamed polystyrene boards. After the mortar drying time (ca. 3 days), external render can be applied. Avoid work in exposure to sunlight, rain and strong wind. The information comprises basic instructions of product application and do not relieve users of responsibility for work in accordance with good construction practice, method of thermal insulation work and OHS regulations.

CONSUMPTION

Foamed polystyrene board fixing - from 4.0 do 5.0 kg/m2 Reinforced layer preparation – from 3.0 to 3.5 kg/m2 The exact amount of adhesive used depends on the substrate (among others, evenness) and used board adhering method.

TOOLS

Drill with mixer, notched float made of steel, trowel. Wash the tools with clean water directly after use. Clean the remainder of the set mortar that is difficult to remove with ATLAS SZOP.

PACKAGING

Paper bags: 25 kg Pallet: 1050 kg in 25 kg bags

STORAGE & TRANSPORT

Store and transport in tightly closed bags, in dry conditions (pallets are particularly recommended). Keep dry. Shelf life in conditions complying with the requirements is 12 months from the date on the packaging.

CAUTION

Irritant. Contains cement. Protect skin, eyes and respiratory tract. Keep away from the reach of children. Do not inhale dust. In case of contact with eyes, immediately rinse with plenty of water and seek medical attention. In case of ingestion, immediately seek medical attention and show the packaging or label.

TECHNICAL DATA

Mixing proportions 0.20÷0.22 l of water for 1 kg of adhesive 5.00÷5.50 l of water for 25 kg of adhesive Pot life – 4 hours Open time – min. 25 minutes Adhesion: to concrete - min. 0.6 MPa to foamed polystyrene - min. 0.1 MPa Temperature: adhesive preparation temperature – from +5°C to +25°C Substrate and ambient temperature during work – from +5°C to +25°C Temperature resistance – from -20°C to +60°C Min. thickness of adhesive layer - 2 mm Max. thickness of adhesive layer - 5 mm Content of soluble chromium (VI) in ready-to-use mix - ≤0.0002 %.

CERTIFICATES

The product has been given Technical Approval no. AT-15-6347/2004 by the Building Research Institute and Hygiene Assessment no. HK/B/0180/02/2004 by the National Institute of Hygiene. ATLAS HOTER U is a part of thermal insulation systems of external building walls: ATLAS ETA 06/0081, EC Certificate of Conformity 1488-CPD-0021 ATLAS HOTER - AT-15-6502/2004, Certificate of Conformity No. ITB-0882/W.