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UltraFloor Fill IT is a general purpose, rapid-setting flowable backfilling concrete designed to eliminate the on-site bulking of underlayments with aggregates in deep section repairs. Its self-compacting flow properties make it easy to apply to a variety of substrates. Its rapid setting and drying properties allow it to be covered with final floor finishes within 24 hours.

Features and benefits:

  • 20 minute set time.
  • Self-compacting.
  • Up to 300 mm application without bulking aggregates.
  • Cover times: 12 hours at 30 mm/ 24 hours at 300 mm.


  • Internal and external use.
  • Suitable for applications from 30–300 mm in one pass.
  • Priming is required (consult manufacturer for further information).

Certification and warranty:

  • Member of FeRFA.
  • Member of the Contract Flooring Association (CFA).
  • TTA approved.
  • Manufactured in line with BS EN ISO 9001, ISO 14001 and OHSAS 18001 management systems.

Standard product features

Technical characteristics:

Set time: 15–30 minutes.

Compressive strength:

  • 1 Day: 20 N/mm².
  • 7 Days: 35 N/mm².
  • 28 Days: 45 N/mm².

Flexural strength:

  • 1 Day: 3.0 N/mm².
  • 7 Days: 4.0 N/mm².
  • 28 Days: 5.0 N/mm².

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-55-20/320 Concrete for small area repairs

NBS Specification

NBS Buliding logo
This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Instarmac Group plc


+44 (0)1827 254400

Product reference

UltraFloor Fill IT

Manufacturer details

Danny Morson Way,
Birch Coppice Business Park,
Staffordshire, B78 1SE
Tel +44 (0)1827 254400
Fax +44 (0)1827 285386
NBS Plus