Highly Chemical Resistant High Solids Novolac Epoxy Resin

Product Description

CHEMFLOOR™ Novolac HS epoxy system is a low viscosity, high performance, Novolac epoxy resin coating system.

Product Uses

CHEMFLOOR™ Novolac HS is suited to use in water and sewage treatment, chemical and food processing areas, giving excellent protection against alkalis and acid solutions. Used instead of normal epoxy for high chemical or heat resistance, particularly for hot fat deep frying in commercial kitchens.

Used for floors, walls, storage tanks, equipment and bunds. It is suitable for concrete, masonry or steel.

CHEMFLOOR™ Novolac HS coating system can be used as a laminating resin with fibreglass cloth, mat or tissue.


  • Easy to use by roller or brush.
  • System is vapour proof and does not support bacterial growth
  • Meets requirements of AS4020 for potable water.
  • Hard wearing and suitable for foot traffic and rubber-tyred vehicles.


Surfaces must be sound, smooth, and free from dust, oil, grease or other contaminants. Repair defects.

  • Non-porous, dense concrete should be etched with diluted phosphoric acid and flushed clean with water or otherwise mechanically abraded.
  • Concrete should be cured for minimum 28 days and have a moisture content of 5% or less. Moisture testing of concrete prior to installation is recommended.

Application to New Concrete

  • New concrete should be cured for 28 days and have minimum compressive strength of 25 MPa.
  • Do not use surface curing agents.
  • The surface must be free of cement laitance. Mechanical grinding or shot blasting is recommended.
  • Prime concrete with CHEMFLOOR™ 100 or Novolac HS at the rate of 6 – 8 m²/litre (mix ratio Part A:Part B is 2:1 by volume).


Part A and B should be mixed together at low speed, for 3 minutes to give uniform colour consistency. Allowing mixed resins to develop heat in the mixing container to above 18°C in cold weather will assist in speeding cure of the applied product.


Apply CHEMFLOOR™ Novolac HS by brush or roller in 2-3 coats to achieve a minimum 0.9mm DFT. Allow to fully cure before exposure to chemicals.

Do not apply CHEMFLOOR™ Novolac epoxy coating system to surfaces subject to rising damp.

High atmospheric humidity or drop in ambient temperature to around dew point 4°C may result in condensation on the uncured film, causing blooming in surface. As a consequence, roughening of the surface by mechanical abrasion will be required. Although the coating will cure at low temperatures, the extended gel times may make the resultant film susceptible to water spotting. Maximum relative humidity during cure should not exceed 85%.

For a non-slip finish, broadcast silica sand or grit into first wet coat to give required slip resistant finish. Mesh size used may increase quantity of CHEMFLOOR™ needed to achieve desired finish.


Chemical 30 Days 6 Months 12 Months
10% Nitric 95-100% 85-90% <85%
10% Phosphoric 95-100% 90-95% 85-90%
10% Sulphuric 95-100% 95-100% 90-95%
60% Sulphuric 95-100% 95-100% 85-90%
32% Hydrochloric 95-100% 95-100% 85-90%
5% Hydrochloric 95-100% 95-100% 90-95%
5% Acetic 95-100% 90-95% 85-90%
5% Lactic 95-100% 90-95% 85-90%
50% Caustic 95-100% 95-100% 95-100%
Xylene 95-100% 95-100% 90-95%
Kerosene 95-100% 95-100% 95-100%
MIBK 95-100% 90-95% 85-90%


1. % original hardness
2. Continuous Immersion at 20°C


Special colours are available in CHEMFLOOR™ Novolac HS. Packaging of special colours is: Part A 10.5 litres, Part B 4 litres and Colour Pack 1.5 litres. Contact your local GCP representative for cost and availability.


  • Do not thin, as this may have adverse affects on cured film properties.
  • Resurfacing of old epoxy or re-coat after several days cure will require thorough mechanical abrasion of the surface to ensure good adhesion.
  • Ensure adequate ventilation of work area and use PPE as detailed in product MSDS.
  • Avoid unproven colour pigments. If doubt exists, test colour pack in a small mix.
  • Take precautions to avoid skin contact. Use barrier cream and disposable polyethylene gloves. Refer to MSDS for all requirements.


CHEMFLOOR™ Novolac HS is available in 16 litre sets.

Shelf Life

Unopened containers have 12-month shelf life from date of manufacture, when stored in a dry, cool place.

Typical Properties

Property CHEMFLOOR™ Novolac HS
Colour Part A Clear or Coloured
Colour Part B Clear
Mix Ratio
(by volume)
Part A : Part B
3 : 1
Pot Life 35 min. @ 20°C (4 lit mix)
Solids Content v/v 90%
Flexural Strength ASTM D790-90  
Modulus 2750MPa
Strength 75MPa
Pull Off Bonding Strength > 3 MPa (concrete)
Application Range 10–35°C (air and substrate)
UV Resistance Will discolour and chalk
Maximum Recoat Time 18 hrs @ 20°C
Cure Time (approx) Light Traffic 12 hrs
Full Cure 7 days


Remove any uncured CHEMFLOOR™ with MULTITEK™ Xylene. Exercise care when using solvents. Please review MSDS before use.

Health and Safety

In case of spills and accidents, refer to the Material Safety Data Sheet (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.


Information contained in this document does not cover all possible application scenarios or imply product suitability for an application. Please contact your local GCP representative or the GCP Technical Department for further information.


GCP and contractors recognised by GCP as experienced in the application of GCP products will provide warranties for individual projects. Warranty periods offered are dependent on project details and complexity. Requests for very long warranty periods may necessitate increased membrane thicknesses to ensure longevity. Contact your local GCP representative for further details.

Release Date: 02/11/18. The information contained in this product data sheet supersedes all previous versions. | Australia customer service: 1800 855 525

Australia 1800 334 444 New Zealand 0800 552 235 China Mainland +86 21 3158 2888 Hong Kong +852 2675 7898 India +91 124 402 8972 Indonesia +62 21 893 4260 Japan +81 3 5226 0231 Korea +82 32 820 0800 Malaysia +60 3 9074 6133 Philippines +63 49 549 7373 Singapore +65 6265 3033 Thailand +66 2 709 4470 Vietnam +84 8 3710 6168

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.

CHEMFLOOR, and MULTITEK are trademarks 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 2019 GCP Applied Technologies, Inc. All rights reserved.

Printed in Australia GCP PDS 030 07/17

This document is only current as of the last updated date stated below and is valid only for use in Australia. 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: 2021-02-05