NBS Source


Suitable for industrial and commercial roofing, such as:

  • Corrugated asbestos;
  • Flat felted roofs;
  • Profiled steel sheet roofing.


Two-coat system for encapsulating, insulating and waterproofing asbestos roof sheeting. The basecoat is a spray-applied primer insulation layer which will reduce heat losses through the roof. The topcoat is a spray-applied, flexible waterproof coating which creates a seamless monolithic protection layer for the asbestos and insulation basecoat.

Features and benefits:

  • Designed for easy application.
  • When cured, the material has been formulated to perform in wet environments, and it exhibits good resistance to hydrolysis and UV-exposure.
  • Makes the roof completely waterproof.
  • Stronger than typical single-component waterproofing systems, giving it high hail, bird and traffic protection.
  • More cost effective than removing asbestos and re-roofing.
  • Improves the strength of the underlying roof structure.
  • Minimal disruption to the site.
  • Eliminates the risks associated with asbestos.
  • Can improve the thermal efficiency of the building as it reduces energy consumption.
  • Available in a range of colours.
  • Environmentally friendly due to low Ozone Depletion Potential (ODP).
  • 25-year guarantee.

General information


25 years

Uniclass 2015

Pr_35_31_77_76 SealersPrimary


M60/175 Protective coating

M60/195 Special coating

Specification data - Sealers Enhanced data

Standard product features

Technical characteristics:

  • Thermal conductivity (to BS EN 12667): 0.028 W/mK.
  • Shore hardness (to ASTM D2240): 80–85ºA.
  • Tensile strength (to ASTM 638): 20 MPa.
  • Elongation (to ASTM 638): 380%.
  • Modulus (to ASTM 638): At 100%: 6.8 MPa. At 300%: 10 MPa.
  • Tear strength (to ASTM D624): 65 kN/m.
  • Abrasive resistance (to ASTM D4060): 150 mg (maximum).
  • Gel time: 15 seconds.
  • Touch dry: 30 seconds.
  • Cure: 80% of maximum tensile strength is attained within 24 hours at 20ºC.

Product Reference


Colour/ Finish


Contains leafing aluminium pigment to impart solar reflectivity.


Dark Grey.


Consult manufacturer for details and insert requirements..