Two-part, fast-curing, pure polyurea, spray-applied elastomeric coating. It provides a premium quality, high build, long life protective coating to concrete and metal substrates on major civil, infrastructure and commercial construction projects. Formulated using the latest polyurea technology, it forms an impenetrable barrier that is resistant to water, chemicals, sewage and wear.
Silcor® 990MP contains no TDI, MOCA, bitumen or tar-based compounds. Being polyurea, it has good resistance to humidity during application and forms a tough, bubble-free, impermeable coating.
Silcor 990MP is a simple 100:100 by volume mix ratio system that applies with good flow out and rapid cure, resulting in a smooth, even coating finish that can be walked on in seconds.
The cured elastomer has high substrate adhesion plus excellent resistance to tear, puncture, chemicals, water and abrasion. Unlike rigid coating materials such as epoxies, vinyl ester, etc., Silcor 990MP resists post-application reflection cracking in concrete substrates.
- Simple application — fast cure
- Potable water certified
- Suitable for continuous immersion
- Long-life — permanently flexible
- Abrasion and chemical resistance
- Total adhesion — no water tracking
- Resistant to sewage gases — H2S, H2SO4 etc Resists reflection cracking in concrete
- Suitable for continuous immersion in demineralised, fresh and salt waters plus desalination permea
Silcor 990MP elastomer system is ideally suited for most areas of protective coating, lining and waterproofing in civil and commercial applications.
Used as a waterproof and highly chemical-resistant barrier on:
- Sewage and water treatment plants
- Desalination plants
- Potable water containment
- Chlorinated swimming lagoons
- Chemical process facilities
It provides lasting protection to plant room floors, chemical storage and secondary containment areas.
Silcor 990MP is compatible with most stable, suitably-prepared rigid substrates, including concrete, steel, aluminium, shotcrete, brick, block, render and fibre cement sheet.
Silcor 990MP is designed for application through high-pressure, plural component spray equipment capable of processing polyurea coatings.
Suitable equipment includes Graco Reactor E-XP2 or H-XP2 machinery fitted with high output heaters, heated lines and Graco Fusion Air Purge or Fusion CS impingement mix spray guns. Equipment should also be fitted with a drum mounted agitator for the polyamine component, material recirculation and drum mounted desiccant driers on both the polyamine and isocyanate components.
Silcor 990MP polyamine component must be agitated before and during use. The isocyanate component does not require agitation.
Typical machine spray settings required for Silcor 990MP application are:
|Material Temperature||20°C to 25°C|
|Main Heater Temperature||60°C to 70°C|
|Line Heater Temperature||60°C to 70°C|
|Spray Pressure||2500 to 2800 psi|
Round pattern spray gun mix chambers will minimise overspray produced considerably.
Substrates must be clean, dry, free of curing compounds, oil, grease, solvent or other contaminants. Moisture content of concrete must be below 5%.
The following conditions must be achieved prior to and maintained during Silcor 990MP application
|Ambient Temperature||4°C to 45°C|
|Substrate Temperature||5°C to 60°C|
|Relative Humidity||85% maximum|
|Dew Point||3°C below substrate|
|Approximate Wind Speed||10 knots maximum|
Apply product in one or more passes to the required dry film thickness. Typically a DFT of 2.0mm to 3.5mm is required for protective coating/lining applications. Specified minimum DFT required will be detailed in our GCP project specific AMS.
Where colour stability is required in sun-exposed applications, apply our aliphatic, UV-stable topcoat, Silcor Top Coat 80, where colour stable protection and a non-slip finish is required.
Small area < 1m² may be repaired by reapplication of Silcor 780HI-LP as detailed in the relevant AMS. In space restricted areas where spray application is not practical, Silcor 580 membrane systems (with Silcor Top Coat 80 finish where UV stability or non-slip finishes are required) can be used, in consultation with your local GCP representative.
See project-specific Application Method Statement (AMS) for detailed requirements. Generally, for concrete substrates use wet, wet-abrasive or dry-abrasive blasting to remove laitance, etc.
Patch defects using suitable fairing compound.
Fill all joints, cracks, gaps and form angle fillets in internal corners or penetrations with Silcor LM PU sealant.
Blast or mechanically clean steel substrates to a 90μm surface profile. Prime with Silcor Primer BW F100 at 0.25kg / m2 or Silcor Primer BS at 0.15kg / m2dependent on substrate condition. Allow to dry approximately 0.5 to 3 hours depending on ambient conditions and surface porosity.
1.1kg (1 litre) of Silcor 990MP system provides coverage of 1m2 at 1.0mm coating thickness. Allow for processing losses, over spray, etc – typically 10% or greater depending on surface and ambient conditions.
|PROPERTY||TYPICAL VALUE||TEST METHOD|
|Mix ratio - polyamine : Iso (by volume)||100 : 100||-|
|Polyamine viscosity (@ 25ºC)||400 - 1000 mPa.s||ASTM D2196|
|Polyamine specific gravity (@ 25ºC)||1.02g / mL||ASTM D1475|
|Isocyanate viscosity (@ 25ºC)||400 - 1000 mPa.s||ASTM D2196|
|Isocyanate specific gravity (@ 25ºC)||1.12g / mL||ASTM D1475|
|Gel time (@ 25ºC)||4 seconds||-|
|Tack free time (@ 25ºC)||20 seconds||-|
|% solids (v/v)||100 %||-|
|Recommended applied thickness||2.0 - 3.5mm||-|
|Return to service
- Light foot traffic
- Heavy foot traffic
- Continuous water immersion
- Paving, topping, backfill, landscaping
- Potable water, chemical or abrasion exposure
|Shore a hardness (minimum)||90 ± 5||ASTM D2240|
|Tensile strength (minimum)||>16 MPa||ASTM D412|
|Elongation (minimum)||300%||ASTM D412|
|Tear strength (minimum)||58.8N / mm||ASTM D412|
|Taber abrasion resistance (maximum)||50 mg||ASTM D4060|
|Crack bridging||Pass||ASTM C836|
|Pull-off strength (minimum)
- Inter-coat adhesion
- Concrete (primed) (substrate failure occurred)
- Steel (90μm blast profile)
> 2.0 MPa
> 2.0 MPa
> 3.0 MPa
|Potable water certification||Certified||BS6920:2000|
The Silcor 990MP system is not intended for use by other than experienced operators. The data herein requires experience and knowledge to attain correct interpretation and outcome. The user must undertake all relevant tests to determine the suitability for the intended application, as such determination of fitness of purpose for product use, is the sole responsibility of the purchaser.
|Silcor 990MP Polyamine||18.5kg & 200kg drums|
|Silcor 990MP Isocyanate||20kg & 210kg drums|
Clean-up liquid leakage or spills before hardening occurs using solvents such as xylene, MEK or acetone.
The Silcor 990MP polyamine and isocyanate components should be stored <25°C, <60% RH. Drums must remain tightly sealed against moisture ingress. Under these storage conditions these materials will have a shelf life of 12 months. Storage at temperatures other than detailed can result in degradation and crystallisation in the drum, rendering the materials unusable. Ingress of humidity or water into the drums during storage or use will also make product unusable.
Refer to Silcor 990MP Material Safety Data Sheet (MSDS).
Operators must have full awareness of the material safety requirements before any work is undertaken. Silcor 990MP polyamine component is a mild irritant. Avoid contact with skin or eyes.
Silcor 990MP isocyanate component contains Methylenebisphenyl Diisocyanate (MDI). It is an irritant and allergic sensitiser to skin and respiratory systems. Avoid contact with skin or eyes. Avoid breathing vapour or spray aerosol.
Silcor 990MP system spray application must occur in areas with adequate ventilation. Suitable organic vapour respirators or air-fed hoods must be worn during spray operations. Other required PPE includes butyl or nitrile gloves, safety goggles or full-face shield, coveralls and chemical-resistant safety boots.
Health and Safety
In case of spills and accidents, refer to the MSDS of the products or when in doubt contact your local GCP representative.
Always wear protective clothing, gloves and protective goggles when handling chemical products.
For full information, consult the relevant MSDS.
GCP offers a comprehensive package of quality and proven systems to meet different project and application needs. Contact your local GCP representative for further information.
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Last Updated: 2018-11-30