Newton 203-RM


Suitable for areas that cannot be taken out of service for long periods, or where the concrete is subjected to heavy wear such as roads, runways, bridges, decks, floors and footpaths.


A single-component, fast-setting, Portland cement-based structural mortar, used primarily for the durable repair of concrete.

Polymer-modified, and fibre-reinforced, Newton 203-RM is physically and chemically compatible with the host concrete, quickly exhibiting high adhesive and compressive strength. As a single component, requiring only the addition of water, the resulting mortar is rapid curing with enhanced polymeric properties and reliable strength development which is not significantly affected by low temperature use. The mortar can be used as supplied up to 100 mm deep, or it can be bulked out with sharp sand to form a high-performance screed or for floor or deck repairs up to maximum depth of 300 mm.

Surface preparation is required, as is protection after application - consult manufacturer for details.

Features and benefits:

  • Incorporates the latest proven cement chemistry, fibre and styrene acrylic copolymer technology.
  • Reliable strength development, even at sub-zero temperatures, gives rapid return to service.
  • Pre-packaged material only requires mixing with clean water. Can be bulked out with sand or aggregate.
  • High bond strength exceeds tensile strength of concrete, thus ensuring monolithic performance of the repair.
  • Sets in 10 minutes at 20°C yielding a durable, high strength mortar.
  • Dense matrix resists 10 bar water pressure. Very high diffusion resistance to acid gases and chloride ions.
  • Sulphate resistance to class DS-5/5m of BRE Special Digest 1 and ideally suited for sewage and wastewater applications.
  • Portland cement base with physical properties of cured material similar to base concrete.
  • Non-toxic when cured and is listed as authorised under Regulation 31 for use in the supply of drinking water.
  • Economic mortar requiring no substrate or inter-layer priming. Part bags can be mixed.
  • Suitable for use on correctly prepared concrete of at least 20 kN.
  • CE marked in accordance with EN 1504-3. Suitable for repair methods 3.1, 7.1, 7.2 as defined by BS EN 1504-3.
  • Compliant with Highways Agency Standard BD27/86 for the repair of Highway Structures.
  • Compliant with LU Standard 1-085 ‘Fire Safety Performance of Materials’.
  • Can be applied using a trowel or putty knife.


  • Ready for next layer: At 5°C: After 30 minutes; at 10°C: After 25 minutes; at 15°C: After 25 minutes; at 20°C: After 20 minutes; at 25°C: After 15 minutes.
  • To be kept rain-free: At 5°C: For 60 minutes; at 10°C: For 50 minutes; at 15°C: For 50 minutes; at 20°C: For 40 minutes; at 25°C: For 30 minutes.
  • Ready for temporary foot traffic/ protection boards: At 5°C: After 6 hours; at 10°C: After 5 hours; at 15°C: After 4 hours; at 20°C: After 3 hours; at 25°C: After 2 hours.
  • Fully cured: After 28 days.

General information


Matte textured finish


Grey. Coloured UV-stable protective finishes available.



Portland cement base mortar


Powder form


25 kg, 40 packs a pallet


When specified, installed and protected in accordance with the Data Sheet and Application Guides, and is protected from physical, Newton 203-RM has a service life that can be equal to the design life of the structure

Uniclass 2015

Pr_20_31_53_15 Concrete repair mortarsPrimary


C42/310 Repair mortar

Product range

System 200 - High Build Cement Mortars

Specification data - Concrete repair mortars Enhanced data


CE marked in accordance with EN 1504-3. Suitable for repair methods 3.1, 7.1, 7.2 as defined by BS EN 1504-3. Compliant with Highways Agency Standard BD27/86 for the repair of Highway Structure and compliant with LU Standard 1-085 ‘Fire Safety Performance of Materials.

Mortar type

Portland cement-based structural mortar. Economic mortar requiring no substrate or inter-layer priming.

Performance requirement class

To EN 1504-3 – Class R4 and EN 1504-3.

Product Reference

Newton 203-RM

Yield per kg

0.53 L.

Yield per kg – bulked out – maximum

0.92 L.

Shelf life

12 months.

Pot life at 20°C and Relative Humidity (RH) of 60%

10 minutes.

Minimum application thickness

5 mm.

Maximum application thickness – vertical and soffit

50 mm.

Maximum application thickness – decks and floors

100 mm.

Maximum application thickness – bulked out

300 mm.

Application temperature

+5 to +40 °C.

Service temperature

-10 to +180 °C.


Slight polymer smell when mixing.

VOC content


Density / Specific gravity


Compressive bond – Class R4

> 45 MPa.

Compressive strength – 1 hour

14 MPa.

Compressive strength – 2 hours

20 MPa.

Compressive strength – 4 hours

30 MPa.

Compressive strength – 1 day

40 MPa.

Compressive strength – 7 days

50 MPa.

Compressive strength – 28 days

60 MPa.

Adhesive bond – Class R4

>2 MPa.

Capillary absorption

0.108 kg/m-2/h-0.5.

Chloride Ion content

1.6 MPa.

Carbonisation resistance


Elastic modulus

26.1 GPa.

Thermal Capability – Part 1 – Class R4

>2 MPa.

Dangerous substances

Complies with 5.4.

Reaction to fire

Euroclass A2-s1, d0.

Water permeability coefficient

2.60x 10-14 m/s.


Newton 203-RM High Strength Repair Mortar

Newton 203-RM High Strength Repair Mortar