Adhesive for mesh embedding - PASTI FIX
USE
PASTI FIX is a cement adhesive for fixing foamed polystyrene boards in PASTI thermal insulation systems. PASTI FIX 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
PASTI FIX 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 PASTI 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. 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).
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.
APPLICATION
Board fixing-Apply PASTI FIX 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 PASTI FIX 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.
PACKAGING
Paper bags: 25 kg
TECHNICAL DATA
|
Adhesion |
To concrete - min. 0.3 MPa |
|
Mixing proportions |
0.20÷0.22 l of water for 1 kg of mortar |
|
Substrate and ambient temperature |
From +5°C to +25°C |
|
Temperature resistance |
From -20°C to +60°C |
|
Consumption |
4.5 kg / 1m2 |
|
Drying time |
Pot life – 3 hours |
|
Diffusion resistance |
≤0.0002 |
