NBS Source
I'm a manufacturer
Compare variants

Retanol EKA BW - Cementitious Screed - Floor Screed Additive

Verified by manufacturer 20 days ago

Retanol EKA BW - Cementitious Screed (Bonded)

Retanol Variant:
Third party certifications:
  • TUV - Safety and Quality Report

    Certificate type

  • BREEAM - Certification

    Certificate type

Specialist fast drying screed with a completed drying time of only 7 days with a Underfloor Heating Commissioning protocol of just 4 days. Guaranteed savings with quality and performance guaranteed.

Jump to:
BOS
+44 (0)151 345 7390 Website

Application

Suitable for permanently wet areas, as water impervious. For internal and external use.


Can be used as a wearing screed, and holds full third party certification.


Retanol EKA BW Pro 1


Key performance benefits:

  • Guaranteed drying times: 7, 14, or 21 days depending on dosage.
  • Up to CT-C35-F5.
  • Foot traffic after 24 hours.
  • Underfloor heating can be run after 2 to 4 days (depending on dosage as per PCT Guidelines).
  • Early compressive and flexural strength.
  • Very low tension so shrinkage cracks are minimal.
  • Ideal for underfloor heating with improved thermal conductivity – a minimum of 35 mm coverage is required on top of the UFH pipe.
  • Extended working life with short drying time.
  • Insensitive to moisture, therefore suitable for permanently wet areas.
  • For internal and external use.
  • Bonded screeds from 25 mm.
  • Unbonded and floating screeds from 35 mm.
  • CE Certified and safe to use - All Retanol products are CE Certified (Conformité Européenne) and carry the CE stamp. They also fully satisfy German DIN Standards (Deutsches Institut für Normung - German Institute for Standardization) and Retanol has the prestigious TUV Rheinland Certification (see attached) which means it is the only screed additive recognised under European law as having no negative impact on human health when handled or added into a floor screed.


Retanol EKA BW dosage per screed pump mix

When using a 250 litres standard screed pump vessel, a minimum of 2 bags i.e. 50 kg of cement is required for the mix designs stated below.


Dosage (5 pump fillings are assumed at 200 litres each, amounting to 1 m³).


  • 350 ml of RETANOL EKA BW per screed pump mix for 7 day drying – i.e. 1.75 litres per m³.


The importance of good quality sharp screeding sand with a well distributed grading curve.

 

The importance of the sand “grading curve” cannot be understated when mixing any semi dry cementitious screed.

 

The grading curve shows the particle sizes of the sand/gravel used in the mixing process, and a favourable grain distribution is crucial is creating the perfect screed.

 

In the UK, we generally work to a 0-4 mm grading curve which means the diameter of the grain sizes will vary from 0 to 4 mm.

 

In order to create a solid support framework for Retanol screed, the ratio between fine sand and coarser sand in the grading curve should be between 60% to 70% fines (which means a nice consistent spread of 0 to 2 mm grains) and 30% to 40% coarser sand (which means a nice consistent spread of grains with a diameter of >2 mm to 4 mm).


Cements approved for use with Retanol EKA BW

  1. Type: Portland cements – CEM I, or Portland composite cements – CEM II (for example A-L, A-LL, B-L, B-LL).
  2. Class: 32.5 N + R/42.5 N + R (note that 52.5 is less suitable for screeds due to its higher strength which can increase the risk of cracking and deformation).
  3. Quality: Use standardized and QC-monitored cements.

Description

Retanol EKA BW is a tension-free high performance cementitious screed with low shrinkage. Subject to the chosen dosage, Retanol EKA BW offers a guaranteed drying time of seven days.


Features and benefits:

  • CT-C35-F5 classification.
  • Can withstand foot traffic and underfloor heating after 24 hours.
  • Early compressive and flexural strength.
  • Ideal for underfloor heating with improved thermal conductivity.
  • Extended working life with short drying time.
  • Insensitive to moisture.
  • UFH pipes require a minimum of 35 mm coverage over the pipe (As per BS 8204).
  • Bonded screeds from 25 mm. Can be installed at just 15 mm depth when using with ZE Bonding Agent! is possible with 0-4 mm aggregates.
  • Unbonded and floating screeds from 35 mm.

General information

Color

Clear

Finish

Other

Material

Cementitious

Shape

Formless

Length

Bespoke

Width

Bespoke

Height

Bespoke

Warranty description

Ten year

Uniclass

Pr_35_31_06_69 Quick-drying levelling screed mixesPrimary
Pr_35_31_06_12 Cementitious levelling screed mixes

CAWS

M10/130 Proprietary quick drying levelling screeds

M10/7 Proprietary quick drying levelling screeds

Specification data - Quick-drying levelling screed mixes

Cement

Guidance for specification option:

Insert requirements.


Cements approved for use with Retanol EKA BW:

  1. Type: Portland cements – CEM I, or Portland composite cements – CEM II (for example A-L, A-LL, B-L, B-LL).
  2. Class: 32.5 N + R/42.5 N + R (note that 52.5 is less suitable for screeds due to its higher strength which can increase the risk of cracking and deformation).
  3. Quality: Use standardized and QC-monitored cements.

Coarse aggregate

0–4 mm grading curve.

Guidance for specification option:

The diameter of the grain sizes will vary from 0 to 4 mm:

  • 60–70% fines (for a consistent spread of 0–2 mm grains);
  • 30–40% coarser sand.

Admixture

350 mL dosage per standard pump gauge.

Fibre reinforcement

Not required.

Dosage

350 mL per 50 kg of cement - 0.6%.

Thickness:

-

Manufacturer guidance

Insert requirements.

  • Bonded screeds from 25 mm. In special cases, and subject to PCT site inspection and assessment, 15 mm depth (with ZE Bonding Agent) is possible with 0–4 mm aggregates.

Sustainability data

Contains Red List materials

No

Guidance for specification option:

TÜV Rheinland Certified to contain zero harmful content.

Country of material origin

Germany

Country of product manufacture

Germany

Embodied carbon

A1-A3 (production stage) as defined in BS EN 15804

-

Manufacturer guidance

Refer to BREEAM certificate.

Recyclability

-

Manufacturer guidance

Supplied in recycled plastic bottles.


BIM objects

BOS

NBS BIM Object Standard

This BIM object has been authored to meet the requirements of the NBS BIM Object Standard.

Find out more about the NBS BIM Object Standard.

Platform Compatible Version
IFC
-

2

Revit
-

2

Third party certifications

TUV - Safety and Quality Report

TUV - Safety and Quality Report

TÜV Rheinland Certification

BREEAM - Certification

BREEAM - Certification

BREEAM

Literature

5. PCT UK Retanol EKA BW

5. PCT UK Retanol EKA BW

MSDS V2.0 Retanol EKA BW

MSDS V2.0 Retanol EKA BW

Case studies

Primus Strand Resort

Primus Strand Resort

Living Building Milan

Living Building Milan

Similar products from Retanol

Retanol Xtreme -  Quick Dry screed - Floor Screed

Retanol Xtreme - Quick Dry screed - Floor Screed