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20L pail of SILCOR 560 HB LVOC low VOC polyurethane waterproofing membrane for wet areas, balconies, AS3740 compliant
20L pail of SILCOR 560 HB LVOC low VOC polyurethane waterproofing membrane for wet areas, balconies, AS3740 compliant

SILCOR® 560 HB LVOC

Solvent-free, very-low-VOC Class III polyurethane membrane for concealed internal and external waterproofing beneath approved protection.

Vendor: GCP
SKU: SILCOR560HBLOWVOC/18.9
Availability: In Stock
$279.39
$279.39
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Description  

SILCOR® 560 HB LVOC is GCP's solvent-free, very-low-VOC, one-part high-solids polyurethane waterproofing membrane for non-exposed internal and external applications. Like standard 560 HB, it is a Class III high-extensibility membrane for horizontal, sloping and vertical surfaces, but with a lower-emission formulation.

Choose 560 HB LVOC when

  • A one-part high-build polyurethane membrane is required beneath approved protection or finishes.
  • Very-low-VOC / solvent-free membrane chemistry is preferred for the project.
  • The job includes internal wet areas, protected balconies or decks, planters, landscaped areas or other covered waterproofing applications permitted by the current GCP specification.

560 HB LVOC vs 560 HB

Both products occupy the concealed Class III waterproofing role. SILCOR 560 HB is the standard high-build option; 560 HB LVOC provides the solvent-free, very-low-VOC alternative. GCP's current Australian documentation also identifies 560 HB LVOC as root resistant for landscaped applications.

Important limitations

  • Not for exposed trafficable or non-trafficable areas: except protected turn-ups as detailed by GCP.
  • Not a negative-pressure membrane.
  • Direct-stick finishes require a tie coat: before bonded screeds, renders, bedded pavers or direct-stick tiles, use the GCP-specified SILCOR 575 HB or 575 LB tie coat with broadcast aggregate. Do not use the finished 560 HB LVOC layer itself as the aggregate tie coat.

Primer selection

For prepared substrates below 5% moisture, use SILCOR Primer BS or EPOCOTE F100W Clear where GCP permits. For prepared concrete and masonry between 5.0% and 6.9% moisture, GCP nominates EPOCOTE F100W Clear.

Protection and UV

560 HB LVOC must be protected from damage and exposure. Current GCP instructions specify SILCOR Top Coat 75 or another approved UV-blocking protection for relevant semi-exposed areas and turn-ups. Do not treat SILCOR Top Coat 80 as a universal replacement for Top Coat 75.

Browse the complete GCP Applied Technologies SILCOR range.

Common Questions  

What is the key application difference of SILCOR 560 LS?
The current supplier documentation includes self-levelling horizontal application in addition to brush, roller and spray methods.

What elongation does it provide?
More than 550% to ASTM D412.

When can it be flood tested or tiled over?
After about 48 hours.

What coverage gives 1mm dry film thickness?
About 1.8kg/m².

Uses & Benefits  
One-part low-odour fast-curing high-solids polyurethane waterproofing membrane with self-levelling horizontal application. Elongation is greater than 550% and tensile strength greater than 2.0MPa to ASTM D412. Ready for flood testing, tiling or topping after about 48 hours. At 1mm dry film thickness, coverage is about 1.8kg/m². Typical specified dry film thickness is 1.2–1.5mm.
How To Apply  
Prepare surfaces so they are sound, smooth and free from dust, laitance, loose matter, oil and contaminants. Prime dry porous substrates with SILCOR Primer BS at about 0.15–0.3kg/m². Use the specified GCP damp or green concrete primer where required. Mix mechanically at low speed until homogeneous. Do not mix by hand. Apply liberally by brush, squeegee, roller or suitable spray method in 2 coats. At 1mm dry film thickness allow about 1.8kg/m². Allow about 48 hours before flood testing, tiling or topping.
Limitations and Safety Info  
Use as a waterproofing membrane rather than a finished traffic surface. Use SILCOR Top Coat 80 where an exposed UV-stable finish is required. Recommended substrate moisture content is below 5%; use the specified damp or green concrete primer where required. Allow concrete at least 28 days cure and render at least 7 days. If recoating after more than 24 hours, follow the GCP cleaning preparation before the next coat.
Suitable Substrates  
  • Concrete, block and brick.
  • Cement render.
  • Timber.
  • Compressed fibre-cement and GRC.
  • Aerated lightweight concrete.
  • Other stable substrates approved by GCP.

SILCOR® 560 HB LVOC Physical Properties

SILCOR® 560 HB LVOC Physical Properties
Property Value
Base Chemistry High solids polyurethane
Specific Gravity 1.48 ±0.03 g/ml
Viscosity Brookfield LV Spindle 4/6 rpm 60,000 ±10,000 mPa.s
Solid Content 91 ±3 %w/w
Tack Free Time 4 hours
Set Time 6 hours
Min Recoat Time 12 hours
Max Recoat Time 48 hours
Min Cure Time – Ready for Flood Testing, Topping, Backfilling 48 hours
Shore A Hardness 55 ±5 °A
Tensile Strength > 2.0 MPa
Elongation > 550 %
Tear Strength > 13.0 N/mm
Bond Strength > 1.5 MPa
Crack Bridging Pass – Class III
Initial Boiling Point and Boiling Range >138 °C
Flashpoint >72 °C
Density at 20 C 1.5 g/cm³
Solubility in Water Not miscible or difficult to mix
Viscosity 60,000 ±10,000
Recoat Time 12
Full Cure 48

SILCOR® 560 HB LVOC - Use Cases

Here are some common examples on where SILCOR® 560 HB LVOC used by our customers.

Waterproofing

Internal Wet Area Waterproofing

Waterproofing floors in bathrooms, laundries, or foyers where low VOC emissions are essential for occupant health.

Its very low VOC formulation ensures reduced site EH&S issues, providing a flexible, seamless membrane compliant with Australian Standards for wet areas.

  • AS 3740:2010 compliant
  • Class III membrane
  • >550% elongation
  • 1.5mm DFT (min)

Waterproofing

External Covered Area Waterproofing

Sealing balconies, podiums, or planter boxes that will be covered, prioritising site safety and compliance.

It meets AS 4654 requirements for external covered areas, providing an elastomeric, low VOC membrane that accommodates structural movement.

  • AS 4654-2012 compliant
  • >550% elongation
  • 1.5mm DFT (min)
  • Class III membrane

Civil Construction

Below Ground Tanking

Tanking for lift pit walls, retaining walls, or basements, especially in enclosed spaces needing low VOCs.

This high-solids, flexible polyurethane offers a seamless, fully bonded solution, reducing EH&S risks in confined spaces with its very low VOCs.

  • External Below Ground use
  • >2.0 MPa tensile strength
  • 91% solids content
  • 1.5mm DFT (min)

Civil Construction

Basement Wall Below-Grade Tanking

Waterproofing retaining walls or basement structures where ventilation is limited and robust protection is required.

Provides a seamless, fully bonded Class III elastomeric barrier, and its low VOC content improves safety in enclosed below-ground environments.

  • Very Low VOC
  • Resistant to root systems
  • Adhesion to concrete > 1.5 MPa
  • Cyclic Crack Bridging Class III

Waterproofing

Non-Exposed Balcony Deck Waterproofing

Installing a waterproof membrane for balconies or podiums that will be tiled or covered, near adjacent occupied spaces.

This liquid-applied, low VOC membrane creates a seamless, flexible barrier, compliant with external waterproofing standards for covered applications.

  • Very Low VOC
  • Meets AS 4654-2012
  • Seamless application
  • Tensile Strength > 2.0 MPa

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