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Delta Roof Guard QC - B4 (T-roof) Liquid Roofing Membrane

Verified by manufacturer 2 months ago

Delta Membrane Systems Ltd

A rapid curing one-component, BROOF (t4) fire classification liquid roofing membrane

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+44 (0)1992 523523 Website


Suitable for cold or warm roof construction:

  • Balconies and terraces.
  • Podium decks.
  • Car parks.
  • Infrastructure.
  • Walkways.
  • Ideal for new construction and refurbishment projects.


A rapid curing one-component, liquid waterproofing membrane which is laid in a two-layer system, enabling Delta Roof Guard Glass Fibre Reinforcement to be embedded in the base layer. Offering a faster curing time, as the two-layer system will allow for inspection of the base layer prior to application of the top coat.

Features and benefits:

  • A one component liquid semi-thixotropic waterproofing composition, after polymerization gives an elastomeric, cold-applied polyurethane membrane.
  • The membrane cures in a continuous and elastic form, as a totally adhered layer.
  • This waterproofing layer guarantees total water tightness and withstands building movements.
  • When the base coat has cured, inspect base coat for pin holes. If any repairs are required they must be fixed at this stage.
  • BS 8102:2009 Type C drained protection.
  • Broof (t4) fire classification.
  • BBA approved.
  • Green roof approved.
  • Quick installation times offering cost savings.
  • Avoiding inherent risks associated with hot works.
  • Seamless applications no joints or fixings.
  • Exceptionally fast curing.
  • Compatible with a wide range of substrates.
  • Easy to maintain.
  • Minimal on-site disruption.

Technical Data:

  • Packaging Metal container: 25 kg.
  • Non-Volatile Content: 43%.
  • Flash Point 26ºC.
  • Density: 0.99 g/cm3 (20ºC).
  • Viscosity Approximate, Brookfield: 20ºC, s62, 100 rpm: 5 mPa.s.
  • VOC Content: 572 g/L, 57%.
  • Storage: keep at a temperature between 35ºC, away from ignition sources and moisture.
  • Use before: 12 months after manufacturing date.

Technical data (Final product):

  • Colour According to specification.
  • Hardness (Shore) 65-70 A (ISO 868).
  • Density 1.3g/cm3.
  • Tear Strength 14 N/mm (ISO 34-1, Method B).
  • Water Vapour Permeability μ>1000 (EN1931) 20g/m2 day.
  • Abrasion 14.3mg (Taber, 1000 cycles, CS-10, UNE 48250).
  • Adhesion: Concrete -2.0 mPa, Ceramics -2.6 mPa, Polyurethane foam -1.4 mPa.
  • UV Resistance: Products includes anti UV additives. A colour change is expected due to its aromatic polyurethane composition. This discolouration does not affect its properties.
  • Thermal resistance stable up to 120ºC.

Mechanical Properties:

  • Maximum elongation 617%.
  • Tensile stress: 4.1 mPa (EN-ISO 527-3).

General information






Chemical description.

Physical state is a liquid.


Pr_35_31_68_64 Polyurethane (PUR) waterproof coatingsPrimary


J40/290 High-density polyethylene/ polypropylene studded cavity drain membrane

J40/170 Loose-laid bitumen gas-retardant membranes

J31/5 Cold deck roof coating

J31/120 Warm deck roof coating

J31/110 Cold deck roof coating

J31/10 Warm deck roof coating

J31/130 Inverted roof coating

Specification data - Polyurethane (PUR) waterproof coatings

Third party certification

BBA 21/5864.


Grey / green.

Colour is unstable under sunlight.

This discolouration takes place also in the treated Delta Roof Guard CP membrane (grey turns to green).

This change does not impair the membranes mechanical properties.

Support Material

In order to achieve a good penetration and bonding, support must be:

  • Flat and levelled (Delta Roof Guard QC is self-levelling).
  • Compact and cohesive (pull off test must show a minimum resistance of 1,4 N/mm2).
  • Even and regular surface.
  • Free from cracks and fissures. If any, they must be previously repaired.
  • Clean and dry, free of dust, loose particles, oils, organic residues, or laitance.



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