AP 450

Substrate type
Concrete, cement floor, cement underlayment with heating components, insulation layers.

Substrate preparation
The substrate should be firm, sound, properly seasoned and free from substances which may impair adhesion. Remove old, loose and peeling material. Widen cracks, patch slightly chipped areas with ALPOL AZ 130 quick-setting mortar or ALPOL AZ 135 levelling mortar. Strengthen loose substrates with ALPOL AG 700 deep-penetrating primer. At least 24 hours prior to pouring the floor, treat the surface with ALPOL AG 703 primer. Apply fibreglass mesh reinforcement to cracked base and areas exposed to stress concentration. When pouring the floor, make new base expansion joints and provide perimeter expansion joint. Protect all steel components (frames, conduits, barriers etc.) from direct contact with anhydrite, due to its corrosive action.

Instructions for use
Stir the bag contents mechanically with specified amount of cold and fresh water to reach homogeneous and required consistency. Allow 5 minutes and stir the prepared mix again. When mixing and pouring with a mixing unit, add water according to the mixing unit type. Pour one layer of the mix onto the substrate, spread with a float or a skimmer blade and remove air voids using a mesh roller or a stippler. Insufficient substrate priming and incomplete removal of air voids from the floor may cause bubbles to emerge on the surface. The intervals while pouring the floor should not exceed 30 min. Floor coverings should be laid after 14 days of floor maturing, and after 28 days for floors more than 35 mm thick. Floor humidity should be checked each time to make sure it is in line with floor covering’s producer recommendations. In case of most coverings, recommended humidity should not exceed 1.5%, whereas for wooden, wood grain and PVC flooring humidity should be below 0.5%. Now, it is recommended to additionally grind the floor and dedust it accordingly to remove any build-ups or deposits. Ceramic, terracotta, porcelain or marble tiles can be fixed to ALPOL AP 450 floor using appropriate ALPOL adhesive mortar. In case of PVC floor coverings, wall-to-wall carpets or parquet floors, it is recommended to level the surface with ALPOL AP 460 self-levelling gypsum floor, after prior treatment with ALPOL AG 703 primer. Add appropriate amount of water. Adding too much water will impair floor strength and prolong its setting time, which may also lead to cracking.

Tools
Floor application unit or low-speed mixer, basket mixer, float, skimmer blade, mesh roller, stippler, containers, scaled container for dosing water.

Working conditions
Work in ambient temperatures between +5°C and +25°C. Do not add any other agents. Protect fresh floor from excessive drying, moisture and draughts.

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 (65±5)%. The workability may alter in different conditions. Appropriate eye, respiratory system and skin protection measures should be used. Becomes alkaline after mixing with water. 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
When pouring the underlayment, observe the rules related to making structural, contraction and isolation (edge) expansion joints. Construction expansion joints should be provided at the location of the expansion joints in a building structure. Contraction joints should divide the floor into fields not exceeding 50 m2, of a diagonal length up to 10 m. Isolation joints should be used to separate floor layer from other building components (walls, columns, stairs etc.). They are also used where underlayment thickness is changed and at the contact point of various floors (e.g. entrance threshold), as well as to separate rectangular areas in rooms of complex geometry. Work according to building practice, observing health & safety standards and regulations.