AK 534

Substrate type
Cement, cement-lime and lime plasters. Walls made of bricks and ceramic blocks, silicate and cellular concrete blocks and others, concrete substrates, mineral wool or Styrofoam layer in thermal insulation systems.

Substrate preparation
For bonding thermal insulation boards
The substrate should be dry, clean, solid and sound, covered neither with ice nor with snow. New plaster work and concrete should be set and seasoned. Remove loose, cracked and brittle plasters and widen joints. Patch slightly chipped areas with ALPOL AZ 130 quick setting or ALPOL AZ 135 levelling mortar, apply ALPOL AT 310 plaster on larger surfaces. Remove contamination and peeling paint from sound plasterwork. Dedust the surfaces. Treat the loose substrate with ALPOL AG 700 and ALPOL AG 703 deep penetrating primer to reduce absorption, if necessary. All the above works should be carried out in temperatures above +5°C.
For embedding mesh
The thermal insulation surface should be dry, clean, even, solid and sound, covered neither with ice nor with snow. Any gaps between boards should be filled with insulation material strips cut to size. Grind the EPS and XPS polystyrene surface with a metal grater or a hand sander. Spread thin layer of adhesive on the mineral wool board surface and allow time until it initially sets.

Instructions for use
Stir the bag contents manually or mechanically with appropriate amount of cold and fresh water to reach a homogeneous and required consistency In low temperatures (up to +5°C) adding warm water is recommended. Allow 5 minutes and stir the prepared mix again. Use prepared mix within 30 minutes from mixing with water. If the adhesive thickens in that period of time, stir it thoroughly without adding water. Adding too much water impairs all characteristics: adhesion, tensile strength and setting time. Spread a thin layer of the adhesive on the mineral wool board, rubbing it into the board surface before bonding.
Bonding thermal insulation boards:
Apply spots with a trowel onto the insulation board and around its edges, or spread a thin layer with a notched trowel, bearing in mind that it should cover at least 40% of the effective bonding surface. When bonding smooth extruded polystyrene boards, before applyingthe adhesive first grind the surface with a metal grater or hand sander in order to provide good adhesion. Board position can be adjusted within 10 minutes after bonding. Bond the boards within max. 20 minutes from spreading adhesive on the surface. In low temperatures, fixing with the use of mechanical fasteners and mesh embedding can be performed no sooner than 3 days after bonding the boards.
Embedding mesh:
Apply the adhesive with a trowel and a steel float onto bonded boards and spread and level it with a notched trowel. Then, apply the mesh and press it with a plain side of the float into the adhesive layer so that the mesh is no longer visible. Apply another adhesive coat if necessary. Once the adhesive dries, any possible surface irregularities should be patched again or ground with sand paper. After the adhesive is fully dry (minimum 3 days), appropriate ALPOL plaster primer can be applied. Priming should be performed in the temperature above +5°C. Decorative plaster can be applied at least after 6 days after embedding the mesh, on condition that the temperature during the following 5 days does not drop below +5°C.

Tools
Mixer or low-speed electric drill, basket mixer, notched trowel, float, trowel, container for water and adhesive.

Working conditions
Work in ambient and substrate temperatures between 0°C and +25°C. Temperature drop down to –5°C after 8 hours from application is allowed. If temperature drops below –5°C are expected in the following 3 days, refrain from using the adhesive. Do not add any other agents to the adhesive. Protect freshly applied adhesive from excessive drying and moisture.

Storage
Store in original, unopened packages in dry place – shelf life 6 months from production date. Protect from moisture during transport and storage.

Notes
The specifications and instructions for use are given for the temperature of (20±2)°C and relative air humidity of (60±5)%. The workability may alter in different conditions. Becomes alkaline after mixing with water. Irritating to eyes and respiratory system. Appropriate eye, respiratory system and skin protection measures should be used. 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 accepts no responsibility for damage caused by unskilful or inappropriate use of the product.

General recommendations
Work according to building practice, observing health & safety standards and regulations. For more details on bonding insulation boards, embedding reinforcing mesh, insulating walls see manufacturer’s instructions referring to ALPOL EKO PLUS, ALPOL EKO PLUS WM and ALPOL STROP WM thermal insulation systems as well as the Building Research Institute (ITB) instructions No. ITB 418/2007, ITB 447/2009 and the information contained herein.