REDBAG 321 is intended for arranging floor screeds with a layer thickness of 10 to 60 mm on rigid bonded bases inside buildings. Recommended for making sloping floors; for preparing bases for leveling mixtures, as well as for laying ceramic coatings. Compressive strength 15 MPa (M150).

Attention! For floors with water heating and floors on separating layers, as well as outside buildings, the REDBAG 322 mixture should be used. For floors with electric heating and floors on “floating bases” (heat and sound insulation layer), the REDBAG 324 mixture should be used.

The substrate must be dry, not frozen, strong (not less than 15 MPa (M150)), capable of bearing loads, free from dust, dirt, oils, greases, lubricants, old paint residues, wax and other substances that reduce adhesion, have uniform water absorption, and meet the requirements of DSTU-N B A.3.1-23:2013, DSTU-N B V.2.6-212:2016, SNiP 2.03.13-88. Remove weak areas of the substrate.

Before installing the screed on already installed cement-sand, cement-lime substrates, it is necessary to clean it of dust and necessarily treat it with a deep penetration primer REDBAG ADHESIS.

The concrete substrate should not be subject to shrinkage after installing the screed, therefore it must be no younger than 3 months from the moment of laying the concrete, and the residual humidity of the concrete must be below 4%. Cast concrete substrates have a smooth surface and low moisture absorption, therefore, after cleaning before finishing, they must be treated with an adhesive primer for dense, smooth, low or no moisture absorbing substrates - REDBAG SUPERSTICK.

Pour the REDBAG 321 dry mix into a container with clean water (at the rate of 3.25-3.75 l of water per 25 kg or 130-150 ml per 1 kg of dry mix), mix using a construction mixer until a homogeneous mass without lumps is formed. Leave for 3 minutes and mix again.

Do not add other materials to the prepared solution.

Attention! The screed can only be installed manually and the recommended amount of water can be used when preparing the mixture (installation using mortar mixing pumps causes an undesirable overdose of water during the preparation of the mixture).

Attention! REDBAG mixtures are created on the basis of modern high-tech recipes using the latest additives from world manufacturers.

When preparing the mixture, use water only in the amount indicated on the package!

Work should be performed at a base temperature of +5 °C to +30 °C. The layer thickness per application should be from 10 mm to 60 mm. When arranging a screed with a thickness of more than 60 mm, it is necessary to add coarse aggregate of a fraction of 5 to 20 mm to the mixture in the proportion of 2 parts of the REDBAG 321 mixture to 1 part of the aggregate by weight, and apply reinforcement. Reinforcement is performed using a reinforcing welded mesh with a cell size of 100×100 mm and a wire diameter of 2 mm or more. When performing a screed, it is necessary to follow the rules for arranging expansion joints: structural, insulating and shrinkage. Structural expansion joints should be used in structural joints of buildings and if necessary to reduce the effect of thermal expansion of materials. If such joints already exist in the base, they must be duplicated in the screed. Insulating joints are used to separate the screed being laid from contact with load-bearing and enclosing structures (walls, columns, stairs, etc.), which can limit floor deformation. Insulating joints are made using an elastic layer (foamed polyethylene, thin polystyrene foam). They are also used in places where the thickness of the base changes, in places where different floors meet, and to separate rectangular fragments of the base in rooms with a complex geometric shape. Shrinkage joints must divide the floor into fields with an area of no more than 20 m2 with a side length of up to 5 m indoors. In corridors, shrinkage joints are arranged at intervals of 2 corridor widths.

The prepared mortar mixture should be laid on the prepared base. After laying the mortar mixture, it must be evenly distributed using a level, vibrating screed or semi-trowel. Final leveling and smoothing should be done using a plastic/expanded polystyrene trowel or other tool. The surface should be moistened within 48 hours after completion of work.

The hardening time of the mortar depends on the temperature and relative humidity of the air. Under normal conditions, namely at a temperature of 20±2 C and a relative humidity of 55±5 %, technological movement on the floor is possible 12 hours after laying the screed. The next layer of screed can be applied either in the period from 24 to 72 hours after applying the first layer, or after 14 days! Pouring self-leveling compound or installing coatings using water-based adhesives should be done after 72 hours, and installing coatings using organic solvent adhesives should be done after 7 days.

1.9 kg/m²* at a layer thickness of 1 mm.

*The consumption of the mixture depends on the unevenness of the substrate and the skills of the performer.