ColorCote^® ZinaCore^™

ColorCote® ZinaCore™

Formerly ZR8

Conforms to AS/NZS 2728:2013 Product type 4 (Table 1.1).
Suitable for ISO 9223 Atmosphere Classifications C1-C3

Description
A high durability product with improved cut edge performance designed to give excellent colour retention and high formability at a moderate cost.

Substrate
Hot dipped Aluminium/Zinc/alloy coated steel coil ZA150 coat weight. Manufactured to AS 1397:2011. Steel grade either G550 or G300.

Pretreatment
Corrosion resistant chromate conversion coating.

Primer
Flexible corrosion resistant chromated primer.

Finish Coat
Flexible exterior acrylic, polyester. Film thickness Nominal 18 microns.
Note: the finish coat can be applied to one or both sides of the sheet in the same or different colours. Colours outside the standard range may be available depending on colour and quantity.

Backing Coat
Shadow Grey (standard colour) wash coat 5 microns thickness.

Gloss
Typical gloss levels are 25%, measured in accordance with ASTM D523-89 (60 degrees). The Naturals colour range (G10) uses a lower gloss level of a nominal 10% which is available in the ZinaCore range.

Strippable Film
Products can be supplied with an optional strippable protective film at extra cost. This material has a relatively short lifespan under exterior exposure conditions. It should be removed as soon as possible within 48 hours of outdoor exposure.

Expected Performance
Outdoor Durability: ColorCote® ZinaCore™, under well-washed conditions of exposure, is expected to show no cracking (other than that which may occur during forming), flaking or peeling of the paint film for 15 years from date of installation.

Colour change during service will depend on the colour chosen, aspect, design of the structure and the environment. Maximum colour change levels of ColorCote® ZinaCore™ colours in normal environments after 10 years service are given in warranty documentation. Colour change is measured using an instrumental colour spectrophotometer, according to ASTM D-2244-93, and determined on clean surfaces, free of all dirt, chalk, oxidised film, oil, grease and other foreign contaminants.

Some chalking may occur. A maximum rating of 2 is expected after 10 years exposure, when measured in accordance with AS/NZS 1580.481.1.11:1998. Scale is between 0 and 5 with a lower number indicating less chalking.

Handling and Roll-Forming
To avoid damaging the paint surface the material must be handled carefully during transport and roll-forming. Pacific Coilcoaters does not recommend the use of roll-forming lubricants on ColorCote® products, as they will affect performance of pre-painted steel and will lead to staining and uneven premature fading.

Typical Properties

• Mar Resistance: Good Scratch Resistance: Good
• Impact Resistance: (AS/NZS 2728 Appendix E) – Greater than 10 Joules
• Pencil Hardness: (AS/NZS 1580.405.1) – F minimum
• Bend Test: (AS/NZS 2728 Appendix F) – No loss of paint adhesion when bent around a diameter equal to five times the
  thickness of the sheet.
• Heat Resistance: Suitable for continuous service up to 1000C. Continuous service at higher temperatures may cause some
  colour change of the paint film.

Accelerated Corrosion Tests
(Tests are conducted on a flat panel.)

Salt Spray
Meets the requirements of AS/NZS 2728:2013 Sections 2.8 and 2.10

Humidity Resistance
Meets the requirements of AS/NZS 2728:2013 Sections 2.8 and table 2.9

QUV Resistance
Meets the requirements of AS/NZS 2728:2013 Sections 2.8 and table 2.4

Chemical Resistance
ZinaCore has good resistance to accidental spillage of solvents such as methylated spirits, mineral turpentine, toluene, trichloroethylene and dilute acids and alkalis. All spillages should be removed immediately by wiping or washing.

Recommended End Uses
Exterior uses where there is a high risk of accelerated corrosion. It has very good colour and gloss retention and is suitable for roofing, cladding, rainwater goods and garage doors. For information concerning product use in areas not covered by ColorCote® ZinaCore™ refer to the ColorCote® ZinaCore X™ and/or AlumiGard X™ technical brochures or contact Pacific Coilcoaters for details. ZinaCore is not suitable for use as water tanks or areas where a constantly wet environment is maintained or in constantly running water or in contact with soil.

Site Practice
If nestable profiles become wet while closely stacked, formation of wet storage stain or ‘white rust’ is inevitable. To minimise the possibility of inadvertent contamination:

1. Inspect deliveries on arrival. If moisture is present, individual sheets should be dried immediately with a clean rag and then stacked to allow air to circulate and complete the drying process.
2. Well ventilated storage is essential. Always store metal products under cover in clean, well-ventilated buildings.
3. Cross-stack or fillet sheets where outside storage is unavoidable and make provision for a fall to allow water to run off.

It is the responsibility of the roofing contractor to avoid damaging the roof sheeting during its installation and fixing.
Never drag sheets from a pile. Remove by ‘turning’ off the stack. Lift sheets onto a roof, and do not drag over the eaves or purlins. Use clean footwear, remove swarf and other contaminants regularly. For further information refer to the MRM Code of Practice.

Touch Up Paint
ColorCote® is a baked on paint system which has different weathering characteristics to standard air drying paints. Do not use touch up paint on ColorCote® products. Minor scratches should be left alone.

Clean Up
Installation procedures involving self-drilling screws, drills and hacksaws etc., will leave deposits of swarf and metal particles.
These particles including blind rivet shanks, nails and screws should be swept and washed from the roof at the end of each day.

Dissimilar Materials
When dissimilar metals come into contact with each other, the electric potential difference between the metals establishes a corrosion cell and accelerated corrosion can occur. To avoid this problem the following precautions should be observed:

• Avoid discharges of water from brass or copper pipes onto ColorCote® ZinaCore™.
• Do not use non-galvanised steel, copper, stainless steel or Monel metal in direct contact with ColorCote® ZinaCore™.
• Do not use lead flashings in contact with ColorCote® ZinaCore™ products. Soft edge aluminium, or notching of flashings, are
  the best solutions.
• Do not use tanalised timber in direct contact with ColorCote® ZinaCore™products. Use PVC tape or similar barrier to isolate
  potential problem points of contact between materials.

ColorCote® ZinaCore™ products are not suitable for use in the following situations:

• Animal shelters, where excessive ammonia fumes can accumulate due to inadequate venting, or where direct contact with animal effluent can occur.
• Water tanks or areas where a constantly wet environment is maintained.
• In direct contact with concrete, or where lime deposits are evident.
• In contact with soil. (Allow 75mm run off below cladding sheets to ground level.)
  
  

Fastenings
Match corrosion resistance of the fastenings with the service life of the chosen ColorCote® ZinaCore™ product. Class 4 coated screws will give best service life with ColorCote® ZinaCore™.
Do not use stainless or Monel fasteners on ColorCote® ZinaCore™products. Aluminium rivets should be used for best results.
For further details refer to the MRM Code of Practice.

Sealing and Jointing
Where sealed joints are required, use only neutral cure silicon rubber sealant, together with mechanical fasteners, such as aluminium rivets. Do not solder or weld ColorCote® products

Unwashed Areas
These are typically those areas that are not washed by natural rainfall, such as the underside of unsarked overhanging roofing and recessed doorways in commercial cladding, tops of garage doors etc. These areas are excluded from warranty. Pacific Coilcoaters recommends the exclusion of unwashed areas by design wherever possible. In cases where this is not possible, then a regular washing programme should be put in place. Airborne contaminants should be removed by water blasting or mechanical washing with water and a soft nylon brush for best results at least every 6 months, or more frequently in severe environments.

Roof Pitch
Do not use a pitch of less than 3° to avoid ponding and premature degradation of the coating system.