Silcor® 580

Two-part, low-odour, heavy-duty-trafficable, polyurethane waterproofing membrane

Product Description

A tough, resilient, polyurethane elastomer-based layer rubber barrier giving long-life waterproof protection. It is a premium grade, low VOC elastomer using the latest technology to provide long-life, protective barriers to prestige construction projects.


  • Fast application by “flood coating” using a squeegee, without multi-layering
  • Long-life, permanently flexible
  • Total adhesion — no water tracking
  • Fully monolithic structure
  • Resistant to puncture and damage
  • Resistant to ponded water
  • UV-resistant and non-yellowing system
  • Hard-wearing, non-slip surface

Combine with other membrane from GCP Applied Technologies to specify a full waterproof envelope.


Silcor® 580 and Silcor Top Coat 80 system are suitable for:

  • Exposed roofing, decks and podiums
  • Car parks and ramps
  • Compactor room floors, plant rooms and wash rooms
  • Sport stadium service-ways, plats and vomitories

Silcor 580 Membrane may be used alone as a protective, impact-resistant, resilient, internal flooring to laboratories, sports centres and gymnasium.

The Silcor 580 system can be applied to most clean, dry, stable surface including concrete, precast, fibre cement sheet, CFC, precast, concrete masonry, brick, render, metals and plastics.


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 will require total removal of existing coatings to expose bare, clean substrate. Machine grinding is the preferred method.

Mix all individual Silcor 580 components with a clean dry stirrer before use.

Preferred application temperature range is between 5°C and 30°C.



To inhibit pin-holes and seal dusty, porous surfaces use one coat of Silcor Primer BS at 8 to10m2 /kg and allow to dry.
Use Silcor Primer BW F100 to seal any damp or green concrete. Roughen PVC or stainless steel before priming with Silcor Primer BW F100.


Measure each individual Silcor 580 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 10°C - 30°C and RH < 85%.


Silcor 580 Membrane

Apply in one coat by 3mm notched trowel/notched squeegee to give a minimum Wet Film Thickness (WFT) of 1.6mm and minimum required DFT of 1.5mm (approximately 2kg / m2). High-output, single-component, airless spray can be used (contact GCP Applied Technologies for technical advice). Apply Silcor Top Coat 80 non-slip top coat for a standard, non-slip finish as detailed below.

Where a high rating non-slip finish is required, apply membrane by a two stage process as follows:

Apply first coat by 3mm notched trowel/notched squeegee, as described above. Allow to cure for minimum 12 hours to maximum 24 hours, then apply a second coat at 0.3mm WFT (approximately 0.4kg / m2). While still wet, broadcast with non-slip aggregate. Allow to cure a minimum 12 hours, remove loose aggregate and apply Silcor Top Coat 80 as detailed below.

Silcor Top Coat 80

Apply Silcor Top Coat 80 by roller or air-less spray system at 0.2 to 0.3kg / m2. Allow 24 hours curing before foot traffic. Total dry film thickness of system to be 1.5 to 2.0mm.


The finished Silcor 580 Membrane may be subjected to foot traffic 8 hours after installation but 5 days curing should be allowed before vehicles are driven over the surface.

If required for functional or aesthetic reasons, areas of Silcor 580 membrane may be covered with optional surfacing systems, after full curing.

  • Tiles: Lay ceramic tiles on mortar bed or apply sand layer before application of suitable adhesive.
  • Landscaping: Use Bituthene® Protection Board or Hydroduct® Drainage Board followed by landscaping.
  • Rigid Surfaces: Use 0.2mm polyethylene slip-sheet under concrete toppings. Lay paving slabs supported on mortar bed.


Silcor 580 36kg 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 Material Safety Data Sheet (MSDS) before use.

Health and Safety

In case of spills and accidents, refer to the MSDS of the products or when in doubt contact your local GCP representative.

Always wear protective clothing, gloves and protective goggles when handling chemical products. For full information, consult the relevant MSDS.

Project Specification

GCP Applied Technologies offers a comprehensive package of quality and proven systems to meet different project and application needs. Contact your local GCP representative for further information.

Typical Properties

Colour Grey  
Specific Gravity 1.2g / mL  
Solids % Vol > 97  
Cure Time - Ready for Flood Test, Tiling, Topping 48 hours  
Mix Ratio (w/w) 1:1  
Pot Life (20ºC) 30 minutes  
Tensile Strength > 8.8MPa ASTM D412
Elongation > 350% ASTM D412
Shore A Hardness 80 ± 5 ASTM D2240
Chemical Resistance Excellent ASTM C543 | Thailand customer service: 66 2 030 9700

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We hope the information here will be helpful. It is based on data and knowledge considered to be true and accurate, and is offered for consideration, investigation and verification by the user, but we do not warrant the results to be obtained. Please read all statements, recommendations, and suggestions in conjunction with our conditions of sale, which apply to all goods supplied by us. No statement, recommendation, or suggestion is intended for any use that would infringe any patent, copyright, or other third party right.

Silcor, Bituthene and Hydroduct are trademarks, which may be registered in the United States and/or other countries, of GCP Applied Technologies, Inc. This trademark list has been compiled using available published information as of the publication date and may not accurately reflect current trademark ownership or status.

© Copyright 2017 GCP Applied Technologies, Inc. All rights reserved.

GCP Applied Technologies Inc., 62 Whittemore Avenue, Cambridge, MA 02140, USA

This document is only current as of the last updated date stated below and is valid only for use in Thailand. It is important that you always refer to the currently available information at the URL below to provide the most current product information at the time of use. Additional literature such as Contractor Manuals, Technical Bulletins, Detail Drawings and detailing recommendations and other relevant documents are also available on Information found on other websites must not be relied upon, as they may not be up-to-date or applicable to the conditions in your location and we do not accept any responsibility for their content. If there are any conflicts or if you need more information, please contact GCP Customer Service.

Last Updated: 2020-01-16