Silcor® 900MP

Rapid-set, spray-applied, liquid waterproofing membrane for roofs, podium decks, terraces etc.

Product Description

Silcor® 900MP is a premium performance two-component spray-applied seamless waterproofing membrane that rapidly cures to form a high-strength, elastomeric, and fully-bonded waterproof membrane. Unlike conventional liquid membranes, Silcor 900MP is extremely durable with excellent wear and chemical resistance and does not normally require additional protection against mechanical damage.

Principal Applications

New and remedial waterproofing for:

  • Roofs
  • Podium decks
  • Terraces
  • Walkways and foot bridges
  • Balconies
  • Green/ Planted roofs
  • Water features/ planters

System Components

  • Silcor® 900MP – premium performance two component, spray-applied seamless waterproofing membrane.
  • Silcor® Primer EP LT – three-component epoxy primer fast curing at low temperatures for use 0°C - 20°C.
  • Silcor® Primer EPF – two-component epoxy primer for concrete substrates.
  • Silcor® Primer MT – two-component phosphate/epoxy primer for metal substrates.
  • Silcor® Primer PU 30 - 1 component polyurethane primer for bitumen sheets (mineralised face).
  • Dry Quartz Silica Sand – fine dry silica quartz sand for use with primers. Contact GCP for specification.
  • Hydroduct® 200/ 650 (optional) – geocomposite drainage/ irrigation sheet.
  • Hydroduct® Root Barrier (optional)


Silcor 900MP spray-applied roof waterproofing system is satisfactory for use as a fully adhered waterproofing layer on new and existing flat (including those with zero pitch) and sloping protected roof specifications e.g. inverted roofs, terraces, podium decks and covered walkways for pedestrian access.


Concrete and steel surfaces must be suitably prepared to accept primers and membranes to ensure adequate adhesion. Mechanical preparation recommended. For further details concerning surface preparation guidelines and primer choice, contact GCP.


Silcor 900MP liquid waterproofing is applied only by experienced, trained contractors. Contact GCP for further details.

Silcor 900MP should only be applied to correctly prepared and primed surfaces in dry conditions. Surfaces should be clean, dry,and free of contaminants and loose particles. Consult GCP for surface preparation guidance and the requirement for mechanical preparation of specific substrates.

Physical properties

  Typical Value Test Method
Tensile Strength 18 Mpa ISO 527
Elongation > 300 % > 300 %
Tear Resistance > 64 N/mm

ISO 34-1

Method B

Adhesion to concrete Concrete failure ISO 4624
  (note 1)  

Water Vapour


9.9 g/m2/day

ISO 15106,

Part 3



30.6 ml/m2/day

(note 3)

ISO 15105,

Part 1

Shore Hardness 91A, 41D ASTM 2240

Abrasion Resistance

(Taber Wear index)

255 mg (note 2) ASTM D4060

1.Tested on prepared, primed, and sand blinded concrete or steel
2. H18/1000 cycles/1000g
3.As a comparison. BRE Report 212 minimum standard 300 μm pe (200-300 ml/m2/day)


  Unit of Sale
Silcor 900MP (Resin) 205 kg
Silcor 900MP (Iso) 225 kg
Silcor Primer EPF (Part A) 3.20 kg
Silcor Primer EPF (Part B) 1.80 kg
Silcor Primer EP LT (Part A) 3.16 kg
Silcor Primer EP LT (Part B) 0.72 kg
Silcor Primer EP LT (Part C) 1.12 kg
Silcor Primer MT (Part A) 6.2 kg
Silcor Primer MT (Part B) 0.9 kg

Store between 5°C &


Shelf life 9 months
Ancillary Products  

Silcor® Top Coat 50

Hydroduct 200 / 650

Optional UV

protective coating

Optional drainage

geocomposite sheets

  • Ambient application temperature must be between 5°C and +40°C. Substrate temperature should exceed the dew point temperature by a minimum of 3°C.
  • Relative humidity should be less than 90%.

Health and Safety

For Silcor 900MP, Silcor Primer EPF, Silcor Primer EP LT and Silcor Primer MT read the product label and Safety Data Sheet (SDS) before use. Users must comply with all risk and safety phrases. SDSs can be obtained from


Product Advantages

  • Seamless – continuous waterproofing integrity.
  • Rapid-set – will accept foot traffic after 5 mins.
  • Robust – no protection needed
  • Productivity – spray-applied for maximum coverage per day.
  • Fully bonded - eliminates water migration to prevent water tracking.
  • Elastomeric - accommodates movements and bridges concrete shrinkage cracks.
  • Durable – tough with excellent wear and damage resistance.
  • Chemical Resistance – excellent fuel and chemical resistance.
  • BBA Certificate
  • European Technical Approval

Details shown are typical illustrations only and not working drawings. For assistance with working drawings and additional technical advice please contact GCP or visit us online at

    Liquid properties

      Typical Value Test Method
    Viscocity - Resin

    400-600 cps

    (note 1)



    Viscocity - Iso

    (note 1)

    800-1200 cps


    Solids Content 100 % ASTM D1644

    Specific gravity

    (Resin, Iso)

    1.03 g/cm³ ,

    1.11 g/cm³ (note 1)


    Coverage Rate

    (2 mm thickness)

    2.2 kg/m²  
    Trafficable (foot traffic)

    2 mins



    1. Measured at 25ºC

    All declared values shown in this data sheet are based on test results determined under laboratory conditions and with the product sample taken directly from stock in its original packing without any alteration or modification of its component parts.

    European Technical Approval ETAG005 Levels of performance

      Characteristic Level of
      Minimum thickness 2.0 mm

    Water vapour resistance

    factor (μ)

      Resistance to wind loads >50 kPa



    ETA -13/


    External fire performance NPD(1)
      Reaction to fire Euroclass E
      Categorisation by working life W2

    Categorisation by climatic zones

      Categorisation by imposed loads P4
      Categorisation by roof slope S1

    Categorisation by surface 

    temperature - lowest - highest





    [Slope (°)/friction coefficient]


    1. External fire performance is dependent on the protection layer used in the roof specification. Deemed-to-satisfy inorganic coverings are listed in the Annex of Commission Decision 2000/553/EC.

    Chemical Resistance

    Silcor 900MP offers protection to a wide range of chemicals. Contact GCP for specific details and recommended applications.


    GCP and trained contractors can provide warranties for individual projects. Contact GCP for further details.

    NBS Specification Clause

    Refer to Clause J30/130 and J31/130. | Thailand customer service: 66 2 030 9700

    This document is only current as of the last updated date stated below and is valid only for use in Thailand. It is important that you always refer to the currently available information at the URL below to provide the most current product information at the time of use. Additional literature such as Contractor Manuals, Technical Bulletins, Detail Drawings and detailing recommendations and other relevant documents are also available on Information found on other websites must not be relied upon, as they may not be up-to-date or applicable to the conditions in your location and we do not accept any responsibility for their content. If there are any conflicts or if you need more information, please contact GCP Customer Service.

    Last Updated: 2018-11-30