Hychem International Pty. Ltd.

HYCHEM SF20
EPOXY FLOOR COATING

Chemical Type

Amine cured epoxy resin.

Description

HYCHEM SF 20 is a solventless epoxy coating which when applied gives an attractive gloss finish. To cater for varying surface needs it is available as a smooth and FG finish. For an antiskid finish, it is recommended that 1 Kg of 60 - 80 mesh calcined alumina be added to each 9lt kit of mixed product.

Major Applications

Motor workshops, aircraft hangars, vehicle depots and spare parts warehouses.
Production areas in food manufacturing plants requiring the highest standard of aesthetics and hygiene.
Institutional floor coverings in health, corrective services and education.
Pharmaceutical, cosmetics and chemical specialities manufacturers.
Electrical & other component manufacturers needing an attractive dust free finish.
Multi level car parks in residential apartment complexes and shopping centres
Service and public areas in retail liquor, clothing and bulk warehouses
Attractive safety finishes in hotels, clubs, sporting venues and entertainment complexes.

Chemical Properties

HYCHEM SF20 is resistant to spillage of oils, hydraulic fluids, fats, acids, alkalies and cleaning agents. It must be noted however that thin coatings are not suitable for containment of materials corrosive to concrete as physical damage can lead to direct concrete attack. In such ninstances HYCHEM SF 20 is always used in conjunction with an epoxy mortar underlay/ The pigments in the coating may alter in colour when exposed to bleaches and acidic solutions, the choice of colour needs to consider the expected end use environment. For better long term resistance to surface staining a final coat of HYCHEM SF 20 Clear is recommended.

Surface Preparation

The existing surface needs to be free of fats, oils, curing agents, surface laitance and other recognisable contaminants. Shot blasting or diamond grinding are acceptable techniques. Greasy, dirty surfaces need first to be caustic washed. The finished prepared surface must have a tensile strength capable of absorbing the shear stresses applied by the epoxy as a result of thermal movements. Surface tensile strength (DIN 1048 Part 2) must be at least 1 MPa. As HYCHEM SF20 will not cover holes in the surface these need to be filled with a patching compound such as HYCHEM PF-4.On many occasions the concrete has been worn back to exposed aggregate. Such surface defects are best made good by application of a HYCHEM GP Epoxy Mortar Mix.

Product Preparation

Resin and hardener need first to be stirred to incorporate any settled solids. The mixed fluids are then combined. For neutral packs, 1.5 Kg of pigment paste to colour must be added per 6 litres of product. Additional epoxy solvent can be added to ease application up to a maximum of 10% by volume

Application

The product is designed to be applied at 3 - 6 sqm / litre using quality rollers to avoid fleece entrapment. Applied at this rate, a coating of minimum 150 micron dft/ coat results. When alumina grit is added, the surface has a satin appearance with a very fine non skid finish. Care needs to be taken not to apply the product too thickly, thereby hiding the antiskid aggregate.
HIGHT IMPACT SF 20 Topping - For maximum performance, a HYCHEM E300SL self levelling epoxy topping at 1 - 3 mm in thickness is applied prior to coating with HYCHEM SF20.

Coverage

A 9 litre pack will cover a minimum of 60 sqm when applied correctly to a previously primed surface. For a first primer coat on bare concrete additional solvent can be added.

Advantages

HYCHEM SF 20 is highly versatile, available in a wide colour range, resistant to many chemicals and suited to both smooth and non skid finishes.

Packaging

HYCHEM SF 20 available in 9 litre packs containing 6 litres of neutral resin and 3 litres of hardener. To each 6 litre pack of neutral resin a 750 ml epoxy pigment pack needs to be added.

Indicative Specifications

Mix Ratio	Resin 6 litres, hardener 3 litres, epoxy pigment 750 ml
Solvent Dilution	May be diluted with up to 5% epoxy solvent per pack.
Work Time	Pot life is approx 30 minutes at 20 deg. C
Cure Time 23 Deg	Recoat 12 hours, normal traffic 30 hours
Site Environment	Do not use under 10 deg, avoid exposure to water and condensation for 24 hours.
Surface Hardening	Standard: 1 day 55 Shore D, 3 days 65 Shore D, 7 days 75 Shore D
Volume Solids	Min 100% as supplied, may be thinned up to 10% with epoxy solvent
Safety	Wear gloves during use, avoid skin contact as dermatitis may result in some individuals.
Best Features	Excellent blend of cost vs performance
Best Features	Highest surface quality even under adverse weather conditions

How to Specify
Epoxy coating to be a solventless epoxy with good surface properties and easy clean non skid finish. Dry coating thickness to be min. 300 microns after a 2 coat application. The product to be HYCHEM SF20 or performance equivalent.

Safety Precautions
Epoxy products may cause allergic reactions through skin contact, goggles, protective gloves and overalls must be worn. Ensure that there is adequate ventilation and avoid breathing the vapour.
Customer Responsibility
The technical information and application advice given in this publication is based on the best information available at time of print. As the information herein is of a general nature, no assumption can be made as to the products suitability for a particular use or application and no warranty as to its accuracy, reliability or completeness either expressed or implied is given other than those required by Commonwealth or State Legislation. The owner, his representative or the contractor is responsible for checking the suitability of products for their intended use.
Field Support
Field support where provided, does not constitute supervisory responsibility. Suggestions made by HYCHEM either verbally or in writing may be followed, modified or rejected by the owner, engineer or contractor since they and not HYCHEM are responsible for carrying out procedures appropriate to a specific application.
Exclusion Clause

The information contained in this data sheet is based on many years experience and is correct to the best of our knowledge. HYCHEM will be under no liability whatsoever whether in:

Contract or tort (including, without limitation, negligence)
Breach of statute
Any other legal or equitable obligation other than the quality of the product at the time of despatch

Any queries about specification use or application should be directed to out technical service department immediately.
This exclusion clause does not operate to exclude any warranty that by law may not be excluded.

HYCHEM SF20EPOXY FLOOR COATING