Extremely hard thin-layer screed installations with an extremely good conductivity.
RETANOL® XTHINN
RETANOL® XTHINN is an extremely hard thin-layer screed installation with an extremely good conductivity. As a highly innovative screed it is particularly suitable for making thin-layer, low-shrinkage and low-tension cement screed over underfloor heating type A (A1).
Outstanding properties
- Pipe coverings with heating screeds from 20 mm possible
- Works virtually regardless of temperature and air humidity
- Readiness for floor covering: 48 h
- Also suitable for permanently wet areas
Areas of application
- Heating screeds
- Renovation of areas with low construction heights and high static requirements
Form
Liquid
Temperature of material relative air humidity
+5 °C up to max. +28 °C
Delivery form
Packaging 10 litres, 20 litres
Processing information for screed experts
Mixture in standard screed pump or mixing vessel, 250 l gross capacity.
Heating screeds with 20 mm heating pipe covering
Bonded screeds from 25 mm layer thickness, floating screeds and screeds on separation layers from 35 mm film thickness
1. Cement CEM I or CEM II approved by PCT:
- 400 ml mixture: 62.5 kg
- 2,000 ml/m³: 312.5 kg/m³
2. Gravel sand 0–4 mm (grading curve range A/B, 0–4):
- 400 ml mixture: 310 kg
- 2,000 ml/m³: 1,560 kg/m³
3. Water-binder ratio: 0.40-0.55
4. Temperature of material: +5 °C to +28 °C
5. Requirements (quality test) / bending tensile strength after 28 days:
- 400 ml mixture: > 6 N/mm²
Suitability for floor traffic after 24 hours. Able to bear loads after 48 hours.
1. Cement CEM I or CEM II approved by PCT:
- 400 ml mixture: 62.5 kg
- 2,000 ml/m³: 312.5 kg/m³
2. Gravel sand 0–8 mm (grading curve range A/B, 0–8):
- 400 ml mixture: 310 kg
- 2,000 ml/m³: 1,560 kg/m³
3. Water-binder ratio: 0.40-0.55
4. Temperature of material: +5 °C to +28 °C
5. Requirements (quality test) / bending tensile strength after 28 days:
- 400 ml mixture: > 6 N/mm²
- 2,000 ml/m³: > 6 N/mm²
Suitability for floor traffic after 24 hours. Able to bear loads after 48 hours.
- Special surface heating systems for low application heights are recommended for heated structures.
- Prior to use of Retanol® Xthinn each laying crew must be instructed by a PCT technician.
- The compressibility of the insulation layers must not exceed a total of two mm.
- It is recommended to use insulation materials especially developed for prefabricated screeds.
- The specifications and notes of the insulation material manufacturers must be observed. The maximum insulation thickness may not exceed 80 mm.
- Maximum area load 3 kN/ m².
- Retanol® Xthinn is not suitable for applying screed coverings of 20 mm on installation pipes (insulated or uninsulated). The specifications of DIN 18560 are applicable in such cases.
- Thin layer screed systems influence the natural resonance behaviour of floating screeds.
Important note: Cement quantities below 62.5 kg = 312.5 kg/m³ and/or dosages below 400 ml = 2,000 ml/m³ do not lead to any strength improvement compared to screeds without XTHINN.
The entire heating phase described below must take place over 24 hours for each temperature step without night setback. The individual flow temperatures must be set manually. System-controlled, automatic heating programmes must not be used.
- Start 24 hours after completion of screed application, flow temperature: +25 °C
- From 3rd day after completion of screed application, flow temperature: +35 °C
- From 4th day after completion of screed application, flow temperature: +45 °C
- From 5th day after completion of screed application, flow temperature: +55 °C
- From 6th day after completion of screed application, flow temperature: +25 °C
If a maximum flow temperature of +55 °C cannot be reached, the maximum flow temperature obtainable by the heating system must be set from the 5th day after completion of the screed application.
The recommended maximum admissible surface temperature specified by the floor covering material and flooring manufacturers must be observed when laying the floor coverings.
All the information on this product given above is based on extensive practical experience and tests carried out by PCT Performance Chemicals GmbH. However, it is not possible to take all construction site conditions into account and to give suitable instructions for use in each case. It is therefore recommended to verify the applicability, appropriateness and practicability of this information and the intended measures by means of individual tests. PCT assumes warranty for the correctness of this product information and the described properties as well as for the effect of the product. PCT reserves the right to change the product specifications. If the site is or has been supervised by PCT (PCT Site Warranty) the user is under no obligation to check applicability and appropriateness.