SILCOR® 990MP

Surface Preparation

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 concrete defects using high strength (minimum 25MPa), non-shrink, repair mortar and allow to cure fully.
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 N105-DT at 0.2 -0.5 kg/m² or Silcor Primer BS at 0.15 - 0.3 kg/m² dependent on substrate condition. Allow to dry approximately 1.5 to 3.5 hours (23 degree Celsius) depends on GCP primer used and depending on ambient conditions and surface porosity.  Recommended moisture content <5%  based on ASTM F2659.
Application to highly porous substrates while substrate temperature is increasing may result in concrete outgassing and pinhole formation in primer. This can be reduced or prevented by priming substrates in the late afternoon or evening, when concrete temperature is stable or falling.

Coverage

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.

Typical Properties

Product Risk

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.

Packaging

Clean Up

Clean-up liquid leakage or spills before hardening occurs using solvents such as xylene, MEK or acetone.

Storage

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.

Handling

Refer to Silcor 990MP Safety Data Sheet (SDS).
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

Read and understand the product label and Safety Data Sheet (SDS) for each system component. All users should acquaint themselves with this information prior to working with the products and follow the
precautionary statements.
SDSs can be obtained by contacting your local GCP representative or office and in some cases from our web site at gcpat.com.

Project Specification

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.