Screedmaster Flow

Application

For the smoothing and levelling of uneven subfloors before laying decorative floor coverings. It can be laid over most common substrates including concrete, sand/ cement screeds, stone, anhydrite screeds, terrazzo and quarry tiles, asphalt and other strong, rigid subfloors.

It should not be used over old tackifer or water soluble residues.

Description

A two-part, protein and casein free, cementitious underlayment with improved flow for smoothing uneven floors prior to laying decorative floor coverings. It is suitable for use with warm water underfloor heating installations, provided a maximum surface temperature of 27°C is not exceeded.

It is not affected by warm water underfloor heating systems or glazed areas. Heating must be switched off at least 48 hours before and after applying the compound.

Features and benefits:

  • Can be used under a surface damp-proofing membrane (DPM).
  • Good workability and flow characteristics, is self-smoothing and can be trowelled to a feather edge.
  • Protein and casein free, making it suitable for use in biologically sensitive areas.
  • The low odour formulation makes it suitable for use in occupied buildings.
  • The moisture tolerant formula enables it to be used to smooth rough, textured subfloors prior to the application of DPM's in buildings incorporating a base DPM.

Applications:

For the smoothing and levelling of uneven subfloors before laying decorative floor coverings. It can be laid over most common substrates including concrete, sand/ cement screeds, stone, anhydrite screeds, terrazzo and quarry tiles, asphalt and other strong, rigid subfloors.

It should not be used over old tackifer or water soluble residues.

Priming:

When using Bostik Screedmaster Rapid DPM, no priming is required. Consult the Bostik Screedmaster Rapid DPM product data sheet for application details.

When priming the following substrates, it is recommended to use the following primer:

  • Absorbent substrates: 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).
  • Calcium sulfate screeds: Bostik Screedmaster Epoxy Primer (diluted 1:1 with water).
  • Applications in excess of 10mm of smoothing compound: Bostik Screedmaster Epoxy Primer.
  • 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 Flow

Standard product features

Technical characteristics:

  • Composition: Cement/ polymer liquid.
  • Gauging liquid: Synthetic rubber.
  • Application temperature: 5–35°C.
  • Coverage: 5 m² at 2–8 mm thickness (approximately).
  • Application thickness: Feather edge to 20 mm (bulk out above 10 mm).
  • Reaction to Fire (to EN 13813): F.
  • Compressive strength (to EN 13813): Typically >25 N/mm² after 28 days.
  • Flexural strength (to EN 13813): Typically >7 N/mm² after 28 days.

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

  • Foot traffic: 1.5 hours.
  • Loose lay floor coverings: 8 hours.
  • Bond floor coverings: 12 hours.

On non-absorbent subfloors lay floor coverings: 24 hours.

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