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GCP SILCOR Top Coat 80
GCP SILCOR Top Coat 80

SILCOR® Top Coat 80

Two-part UV-resistant non-slip polyurethane protective top coat for compatible SILCOR systems, especially specified SILCOR 580 traffic builds.

Vendor: GCP
SKU: SILCORTC80LGR/18
Availability: Out Of Stock
$691.22
$691.22
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Description  

SILCOR® Top Coat 80 is GCP's two-part, UV-resistant aliphatic polyurethane protective coating for compatible exposed SILCOR membrane systems. It creates a colour-stable, non-slip protective finish and is not a standalone waterproofing membrane.

Where Top Coat 80 fits

GCP's current Australian documentation lists Top Coat 80 for compatible SILCOR 580, SILCOR 780 HI-LP, CHEMSPRAY 790 and CHEMSPRAY 690 / SILCOR 990MP systems. Within the Adheseal range, its clearest role is as the protective top coat in specified SILCOR 580 heavy-foot and light-vehicle trafficable systems.

Typical uses

  • Exposed roofs, balconies and decks where the compatible SILCOR system calls for Top Coat 80.
  • Plant room and lift motor room areas.
  • Perimeter turn-ups, penetrations and sill/window flashing details within a compatible system.
  • Heavy-foot and light-vehicle SILCOR 580 systems with the specified wear coat and aggregate build-up.

Application

The underlying SILCOR membrane must be clean and dry. Mix the resin and hardener in the specified 5:1 ratio by weight. GCP's Top Coat 80 product sheet gives a general minimum application rate of 0.3 kg/m² for a 0.15mm minimum DFT; the SILCOR 580 heavy-duty trafficable system specifies a higher two-coat build, so always follow the membrane system PDS or project-specific GCP specification rather than treating the top coat as an isolated product.

Important selection note

Top Coat 80 is not a universal SILCOR top coat. Current GCP documentation specifies SILCOR Top Coat 75 for exposed SILCOR 575 LB and for relevant 560 HB / 560 HB LVOC turn-ups or semi-exposed protection. Do not substitute Top Coat 80 for Top Coat 75 unless GCP's current project specification explicitly permits it.

Finish and exposure

Top Coat 80 is UV resistant and designed to protect the compatible membrane beneath it from exposure and wear. The finished system's traffic classification depends on the complete membrane, wear-coat, aggregate and top-coat build—not Top Coat 80 alone.

See SILCOR 580 or browse the full GCP Applied Technologies range.

Common Questions  

Is SILCOR Top Coat 80 the waterproofing membrane?
No. It is the UV-resistant protective finish applied over compatible SILCOR waterproofing membranes.

What is the mix ratio?
5 parts resin to 1 part hardener by weight.

What is the pot life?
About 30 minutes at 20°C.

What film build is required?
Apply about 0.3kg/m² total for at least 0.15mm dry film thickness.

Uses & Benefits  
Two-part UV-resistant aliphatic polyurethane protective coating for exposed SILCOR membrane systems. Provides a durable non-slip, service foot-trafficable finish on roofs, decks, balconies and plant areas. Mix ratio is 5 parts resin to 1 part hardener by weight. Pot life is about 30 minutes at 20°C. Apply about 0.3kg/m² total for a minimum 0.15mm dry film thickness.
How To Apply  
Ensure the cured SILCOR membrane surface is clean and dry. Mix each component separately, then combine resin and hardener at 5:1 by weight. Mix at low speed for about 5 minutes until uniform. Apply 2 coats by brush or roller, applying the second coat across the first; spray application may use the current GCP wet-on-wet method. Apply about 0.3kg/m² total to achieve at least 0.15mm dry film thickness.
Limitations and Safety Info  
Use as a protective topcoat over compatible SILCOR membrane systems, not as the primary waterproofing membrane. Do not add solvent to mixed material. Discard mixed product once it becomes thick and stringy. Apply only to a clean, dry SILCOR membrane surface. Where painting or tiling is required, first use the sealing system specified by GCP.
Suitable Substrates  
  • Compatible cured SILCOR waterproofing membranes.
  • Exposed roof and deck membrane systems.
  • Balcony, plant-room and lift-motor-room membrane systems.
  • Perimeter turn-ups, penetrations and sill or window-flashing membrane areas.

SILCOR® Top Coat 80 Physical Properties

SILCOR® Top Coat 80 Physical Properties
Property Value
Product Type Two-part UV-resistant protective coating
Base Chemistry Aliphatic polyurethane
System Compatibility SILCOR 580, SILCOR 780 HI-LP, SILCOR 790 HI, SILCOR 990 MP
Mixing Ratio 5:1 resin to hardener by weight
Mixing Time 5 minutes
Application Method Brush, roller, spray
Coats Two coats by brush or roller, single wet-on-wet application by spray
Drying Time at 25°C 2 hours
Shore A Hardness 75-80°A
Tensile Strength 2 MPa, AS1145
UV Resistance Excellent
Coverage Minimum 0.3 kg/m² mixed product
Dry Film Thickness Minimum 0.15 mm
Shelf Life 12 months in sealed pails when stored cool, dry and protected
Clean Up MULTITEK Xylene or methylated spirits before curing
Full Cure 2 hours

SILCOR® Top Coat 80 - Use Cases

Here are some common examples on where SILCOR® Top Coat 80 used by our customers.

Roofing

Exposed roof membrane UV protection

When applying finish coats over Silcor 580 or other nominated Silcor membranes on roof and deck areas exposed to direct sunlight.

This two-part aliphatic coating prevents UV degradation of the underlying membrane while providing a cleanable, colour-fast finish designed specifically for exposed external service.

  • Provides UV-resistant protection for Silcor 580
  • Applied at 0.15mm dry film thickness
  • Tested to 75-80 Shore A hardness

Waterproofing

Trafficable balcony walkway finishing

When a finished membrane surface must support regular service foot traffic on balconies, plant rooms, or lift motor room rooftops.

It creates a durable, non-slip protective layer over the waterproof membrane, ensuring the system remains functional and intact under repeated light foot-traffic loads.

  • Supports service foot traffic
  • Provides non-slip finish
  • 2 hour dry time at 25ºC

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