SILCOR® 880 HVR System

Product Description

Hand-applied polyurethane elastomeric coating providing excellent waterproofing and electrical insulation properties.

Features

• SILCOR^® 880 HVR System is a hand-applied system consists of a hand-applied coating SILCOR VR80 and a hand-applied SILCOR 880 HVR as the base membrane. 
• SILCOR 880 HVR membrane works in supplementary to the repair of SILCOR 880 SVR membrane.

Preparation Before Repair

Surfaces must be sound, smooth and free from dust, laitance, loose matter, oil or other contaminants.
Concrete should be cured 28 days and render 7 days.
Use SILCOR LM PU sealant to fill joints, cracks, gaps and form angle fillets to internal corners or penetrations.
Resurfacing of previously painted surfaces and defects areas will require total removal of existing coatings to expose bare, clean substrate. Machine grinding is the preferred method.
Mix the individual components of SILCOR 880 HVR System (SILCOR 880 HVR membrane and SILCOR VR 80 respectively) with a clean dry stirrer before use.
Preferred application temperature range is between 5°C and 30°C.

Application

Priming

See project-specific Application Method Statement (AMS) for detailed requirements. Generally, for concrete substrates, use wet, wet-abrasive e.g. high pressure water jet, rotary head water blaster or dry-abrasive blasting e.g. mechanical grinding 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.
Apply Silcor VR80 on the substrate as a primer at a minimum dry-film thickness of 0.6mm/m with a minimum consumption of 0.6Kg/m , dependent on substrate condition, application technique and weather. More is required for porous concrete before application of Silcor 880 HVR.

Mixing

Measure each individual SILCOR 880 HVR membrane Membrane Polyol and Isocyanate component accurately by weight into a clean container and mix thoroughly with an electric stirrer (300rpm). Preferred material mixing and application condition is  5°C - 30°C and RH < 85%.

Application

SILCOR 880 HVR Membrane

Apply in one coat by 5mm notched trowel/notched squeegee or Two or more coats by roller, allowing to cure 12 to 24 hours between coats. Typically a DFT of 1.9mm SILCOR 880 HVR membrane and a min 0.6mm DFT Silcor VR80 primer (Total System DFT min 2.5mm) is required for electrical insulation applications specifying a volume resistivity of 5000 x 10¹¹ ohm-cm.
3.04kg/m² of Silcor 880 HVR membrane provides coverage of 1m² at 1.9mm coating thickness.  
Specified minimum DFT required will be detailed in GCP’s project-specific AMS.

Surfacing

The finished SILCOR 880 HVR Membrane may be subjected to foot traffic between 12 hours and 24 hours after installation but 5 days curing should be allowed before vehicles are driven over the surface.
Where colour stability is required in sun-exposed applications, apply our aliphatic, UV-stable wear and tear topcoat protection, SILCOR Top Coat
80 where colour stable protection and a non-slip finish is required.

Packaging

SILCOR 880 HVR Membrane    
(18Kg Polyol + 18Kg ISO)  36Kg per set

SILCOR VR 80            
(20Kg Base + 10Kg Hardener)  30Kg per set

Shelf Life

Do not store product exposed to weather and sun. When kept in a cool, dry, protected area, sealed pails have a 12-month shelf life at 25ºC, 60% RH, but once opened, may solidify within a few days.

Clean Up

Use methylated spirits before curing. Exercise care when using solvent, review all Safety Data Sheet before use.

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.

Typical Properties