Screedmaster Flex

Application

  • For smoothing and levelling sound strong substrates where minimal vibration or lateral movement occurs. It can be laid over most common substrates including concrete, sand/ cement screeds, stone, anhydrite screeds, rigid metal, terrazzo and quarry tiles, asphalt and other strong, rigid subfloors.
  • It is suitable for normal wear in commercial locations.
  • Not to be used as a wearing surface or used over old tackifier or water soluble residues.
  • It may also be used over sound firmly bonded timber flooring such as 12 mm flooring grade (S101) plywood and P5 chipboard provided the timber is mechanically fixed.
  • For interior use only.

Description

A flexible levelling compound reinforced with fibre. It can be applied between 3–30 mm thickness in a single application (5 mm maximum total thickness on mastic asphalt screeds). It is suitable for use with warm water underfloor heating installations, provided a maximum surface temperature of 27°C is not exceeded. The heating must be switched off at least 48 hours before and after application.

May be used to encapsulate electrical radiant underfloor heating (UFH) mats with a minimum of 5 mm covering before bonding tiling products and 10 mm before bonding resilient textile or timber flooring. The substrate to which the UFH matting is fixed must be sound and stable.

The product is not affected by heat from warm water underfloor heating systems, electrical radiant mats or in glazed areas. Electrical underfloor heating must be left switched off for a minimum of seven days after application.

Features and benefits:

  • Fibre reinforced.
  • Rapid setting.
  • Good workability and flow characteristics, the product is self-smoothing and can be trowelled to a 3 mm thickness.
  • The low odour formulation makes it suitable for use in occupied buildings.
  • Protein and casein free, making it suitable for use in biologically sensitive areas.
  • Suitable with underfloor heating.

Applications:

  • For smoothing and levelling sound strong substrates where minimal vibration or lateral movement occurs. It can be laid over most common substrates including concrete, sand/ cement screeds, stone, anhydrite screeds, rigid metal, terrazzo and quarry tiles, asphalt and other strong, rigid subfloors.
  • It is suitable for normal wear in commercial locations.
  • Not to be used as a wearing surface or used over old tackifier or water soluble residues.
  • It may also be used over sound firmly bonded timber flooring such as 12 mm flooring grade (S101) plywood and P5 chipboard provided the timber is mechanically fixed.
  • For interior use only.

Priming:

In all cases, the subfloor must be primed prior to application of the smoothing compound as below. When priming the following substrates, it is recommended to use the following primer:

  • Absorbent substrates and wooden floors (must be mechanically fixed): Bostik Screedmaster Universal Primer (diluted 1:2 with water).
  • Dense/ non-absorbent substrates including epoxy membranes: Bostik Screedmaster Universal or Bostik Screedmaster Epoxy Primer (for applications above 10 mm).
  • Flooring grade mastic asphalt screeds: Bostik Screedmaster Universal Primer neat (for applications up to 5 mm maximum).
  • Calcium sulfate screeds, metal decking and radiant underfloor heating systems: Consult the manufacturer for details.

General information

Uniclass 2015

Pr_35_31_06_80 Smoothing and levelling underlay compoundsPrimary

CAWS

C42/320 Levelling/ smoothing coats

M10/160 Proprietary self smoothing levelling screeds

M10/7 Proprietary quick drying levelling screeds

M13/120 Proprietary self smoothing levelling screeds

M40/460 Smoothing underlayment

M50/460 Smoothing/ levelling underlayment compound

Specification data - Smoothing and levelling underlay compounds

Product Reference

Screedmaster Flex

Standard product features

Technical characteristics:

  • Composition: Cement/ fibre.
  • Gauging liquid: Water.
  • Application temperature: 5–35°C.
  • Coverage: 5.2 m² (per bag) at 3 mm thickness (approximately).
  • Application thickness: 3–30 mm.
  • Reaction to Fire (to EN 13813): Ffl.
  • Compressive strength (to EN 13813): Typically >30 N/mm² after 28 days.
  • Flexural strength (to EN 13813): Typically >7 N/mm² after 28 days

Drying times (<3 mm thickness at 18-20°C):

  • Foot traffic: 4 hours.
  • Loose lay floor coverings: 8 hours.
  • Bond floor coverings: 12 hours.

Similar products from Bostik Ltd

Bostik Screedmaster Flex

Bostik Screedmaster Flex

Bostik Screedmaster Flow

Bostik Screedmaster Flow

Bostik Screedmaster Original

Bostik Screedmaster Original

Bostik Screedmaster Smooth

Bostik Screedmaster Smooth

Bostik Screedmaster Speed 30

Bostik Screedmaster Speed 30

Bostik Screedmaster Trade

Bostik Screedmaster Trade

Bostik Screedmaster Ultimate

Bostik Screedmaster Ultimate

Screedmaster Flow

Screedmaster Flow

Screedmaster Speed 30

Screedmaster Speed 30