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Newton 106 FlexProof is a highly advanced single component liquid waterproofing material, which forms an elastomeric polymer membrane that is rainproof in minutes and capable of handling severe building movements and deformations.

Can be used without a primer, without mixing and in weather conditions that preclude the use of alternatives. When applied by trowel or squeegee over construction joints in concrete, it provides a continuous highly flexible membrane that is resistant to water pressures of up to 2 bar (20 m) over construction joints of up to 0.25 mm.

Features and benefits:

  • No mixing required - simply open the packaging and use.
  • Can be used in sub-zero temperatures and on slightly damp substrate.
  • No primer required - saving on primer and labour costs.
  • Single coat application.
  • 100% waterproof, but allows vapour diffusion.
  • Very flexible - Resistant to movement and fissures in substrates.
  • Excellent adhesion to suitable substrates.
  • Resistant to temperature variations maintaining its characteristics between -40 and +90°C.
  • Excellent resistance to the high alkalinity of concrete.


  • The product has excellent waterproofing capabilities and these can be increased further with the inclusion of Newton FlexProof Scrim to reinforce the membrane at the construction joint.
  • Static construction joints in poured concrete retained structures.
  • Non-static construction joints to precast concrete elements within retained structures.

Related literature

The following content references this product:

Standard product features

Technical characteristics:

  • Adhesion to concrete to EOTA TR-003: > 450 kPa.
  • Tensile strength: 1.3 N/mm². (2 mm film).
  • Loading capacity: 14.4 N/mm².
  • Hardness: 40 Shore A.
  • Water vapour resistance to BS EN ISO 7783:2011: Sd value 6.4 m.
  • Water vapour resistance (calculation from Sd value/ μ value): 4266 μ/ 31.9 MNs/g.
  • Colour: Grey.
  • Form: Polymer paste.
  • Application temperature: 5–40°C.
  • Service temperature: -40 to +100°C.
  • VOC content: 0%.
  • Low odour.
  • Fully cured: 8–12 days. Depending on temperature (5–25°C).
  • Coverage: Single coat of 3.85 kg/m² providing an overall membrane thickness of 2.5 mm.

NBS Specification

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This product is associated with the following NBS Create clause:
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 106 FlexProof (FP1 / FP4)

Manufacturer details

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