Home > Companies > Newton Waterproofing Systems > Newton 103-S (103-S)

Newton 103-S is a two component, thixotropic, cementitious modified polymer waterproofing membrane with high adhesion, designed for the internal and external waterproofing of concrete and steel elements of water-retaining and water-resisting structures such as reservoirs, water tanks, below ground structures, podium decks, and parking areas.

Capable of resisting extremely high positive and negative water pressure, it forms a hard, highly alkaline coating with a degree of elasticity which has greatly enhanced chemical resistance and so is particularly suited for the protection of concrete within sulfate contaminated ground. It has excellent resistance to the ingress of acid gases, moisture and chlorides to enhance the durability of reinforced concrete and protect highway and coastal structures from chloride attack.

The membrane is reinforced over static joints and at details and changes of direction with Newton 912-RT. For horizontal or vertical movement joints use Newton 106 FlexProof.

Features and benefits:

  • Resistant to 10 bar positive and negative water pressure.
  • Quick application in one coat to horizontal surfaces.
  • Non-toxic when cured and is authorised for use under Regulation 31 of the Water Supply (Water Quality) Regulations 2000 for use in contact with drinking water.
  • Sprayable - Up to 2 m² per minute is possible.
  • Hard, durable and UV-stable trafficable finish.
  • All year round application to damp substrate.
  • Can be applied at temperatures as low as 5°C.
  • Very low VOC content.
  • Very high diffusion resistance to carbon dioxide gas and chloride ions; provides the equivalent to 100 mm of good quality concrete cover.
  • Excellent adhesion to sound prepared concrete substrates and steel.
  • Thixotropic - can be applied at 1 mm to vertical surfaces.
  • High build coating of 2 mm eliminates the incidence of small defects seen within thinner membranes.
  • Correctly prepared suitable substrates include concrete of at least 20 kN and steel.


Waterproofing of:

  • Podium decks and car parking areas.
  • Concrete water-retaining structures such as water tanks and reservoirs.
  • Concrete earth-retaining foundation walls to both the positive and negative side.
  • Internal concrete surfaces of walls and rafts or slabs to earth-retained structures such as habitable basements, car parks, plant rooms and lift-pits.
  • Concrete temporary lay down and working areas.

Related literature

The following content references this product:

Standard product features

Technical characteristics:

  • Adhesion to concrete to BS EN 1542: > 2 MPa.
  • Tensile strength to BS6319-7:1994: >2.5 MPa.
  • Loading capability to BS 4551 – 28 days: > 40 MPa.
  • Hardness to BS EN ISO 868:2003: > 75 Shore D.
  • Water vapour resistance to BS EN ISO 7783:2011: Sd value 0.91 m.
  • Water vapour resistance (calculation from Sd value/ DIN 1048): 0.91 μ/ 4.55 MNs/g.
  • Resistance to fire classification: A2-s1.
  • Colour: Grey.
  • Form: Part A liquid, Part B powder.
  • Application temperature: 5–35°C.
  • Service temperature: -15 to +180°C.
  • VOC content: 0%.
  • Low odour characterised as polymeric.
  • UV resistant for 50 years, but will discolour.
  • Biological resistance: DWI regulation 31 approved.
  • Fully cured: 28 days.
  • Coverage: 3.6 kg/m² in one or two coats (membrane thickness: 2 mm).

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-55-04/385 Waterproofing admixture
45-55-70/305 Liquid tanking resin

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Newton Waterproofing Systems


+44 (0)1732 360095

Product reference

Newton 103-S

Manufacturer details

Newton House,
17-20 Sovereign Way,
Kent, TN9 1RH
Tel +44 (0)1732 360095
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