What is Silcor 560 HB used for?

High-build polyurethane waterproofing, with a low-VOC grey variant for interiors where fumes limit work. It builds thick protection in fewer passes than standard membranes.

Do Silcor membranes need a dedicated primer?

Yes. Silcor Primer BS keys the substrate for the membrane system. GCP designs primer, membrane, and top coat as one system; substituting parts risks the performance the spec relies on.

What protects a concrete floor against chemical attack?

Epocote F100W, a two-pack epoxy coating for floors exposed to chemicals, water, and traffic. Build thickness in multiple coats to the data sheet rate.

Is there a UV-stable finish over Silcor membranes?

Silcor Top Coat 80 provides the UV-resistant finish over polyurethane membrane work exposed to sunlight. Match the product spec to the job conditions before you start.

Which Silcor suits a pedestrian balcony?

Silcor 580 with Top Coat 80 traffic finish. The membrane takes the waterproofing duty and the aliphatic top coat carries foot traffic without wearing through.

Do I need reinforcement at corners?

Yes. Embed polyester fabric into the first coat at corners, upstands, and drains before the full build, because those details move and crack unreinforced film.

GCP Waterproofing & SILCOR Membranes

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GCP Applied Technologies

Choose the SILCOR membrane by exposure and traffic

SILCOR 560 HB: one-part high-build polyurethane membrane for non-exposed internal and external waterproofing beneath approved protection.

SILCOR 560 HB LVOC: solvent-free, very-low-VOC alternative for concealed Class III waterproofing.

SILCOR 575 LB: one-part semi self-levelling membrane for horizontal substrates set to falls, including balconies, roof decks, podiums and wet-area floors.

SILCOR 580: two-part heavy-duty trafficable membrane for demanding horizontal areas. GCP's specified heavy-foot and light-vehicle build uses a SILCOR 580 wear coat and SILCOR Top Coat 80.

Primer selection matters

SILCOR Primer BS is the fast-drying single-pack primer for suitable dry prepared substrates. EPOCOTE F100W is the two-part water-based epoxy primer/sealer, with Clear and Grey variants for different substrate conditions. Always select the primer from the current membrane-specific GCP product data sheet rather than treating primers as interchangeable.

Top coats are system-specific

SILCOR Top Coat 80 is a UV-resistant protective coating used with compatible SILCOR systems, including the specified heavy-duty SILCOR 580 trafficable build. GCP's current Australian documentation specifies SILCOR Top Coat 75 for exposed SILCOR 575 LB and relevant 560 HB / 560 HB LVOC turn-ups or semi-exposed protection. Top Coat 80 should not be assumed to replace Top Coat 75 across the range.

Build the system, not just the membrane

Successful SILCOR waterproofing depends on substrate condition, primer selection, membrane type, detailing, protection, drainage falls and the final traffic or exposure requirement. Use the individual product page and current GCP technical data to confirm the complete system before installation.

For alternatives outside GCP, compare the wider waterproofing membrane range.