PPG SIGMACOVER 256 Epoxy Primer 256 is an epoxy coating used as a primer. Two-component high-build, overcoatable polyamide-cured epoxy zinc phosphate primer. Even after prolonged exterior weathering, the coating can still be overcoated with two-component coatings and conventional one-component alkyd coatings. Specifications on this page: volume solids 63 ± 2%, DFT 75-150 µm (3.0-6.0 mil) depending on system requirements, theoretical spreading rate 6.3 m²/L. Comparable products of the same brand and type: PPG SIGMACOVER 246 Epoxy Primer 246, PPG SIGMACOVER 256 Epoxy Primer 256, PPG SIGMACOVER 280 Epoxy General-purpose Primer 280.
Parameter source: PPG manufacturer's Technical Data Sheet (TDS) "PPG SIGMACOVER 256 Epoxy Primer 256"; values such as spreading rate are converted from TDS parameters and are for product selection reference only.
The above content is compiled from the manufacturer's datasheet and this site's parameter tables. For selection, coating systems and lead times, pleaseContact Usfor confirmation.
This page carries the full TDS for this product, translated from the manufacturer's original document. No file download is needed; for an original-language copy, send an enquiry.
| Volume Solids | 63 ± 2% |
|---|---|
| Dry Film Thickness | 75–150 µm (3.0–6.0 mils), depending on the coating system requirements |
| Theoretical Spreading Rate | 6.3 m²/L |
| VOC | Maximum 245.0 g/kg (EU Directive 1999/13… |
| Density / Specific Gravity | 1.4 kg/L (11.7 lb/US gal) |
| Number of Components | Two-component |
| Thinner | Thinner 91-92 |
| Recoat Interval | Minimum: 3 h; maximum: unlimited |
| Introduction | Two-component high-build recoatable polyamide-cured epoxy zinc phosphate primer |
|---|
| Number of Components | Two-component |
| Density | 1.4 kg/L (11.7 lb/US gal) |
| Volume solids | 63 ± 2% |
| VOC (as supplied) | Maximum 245.0 g/kg (EU Directive 1999/13/EC, SED) |
British Standard UK PG 6/23(92) Appendix 3: maximum 338.0 g/L (approximately 2.8 lb/US gal)
| Recommended dry film thickness | 75–150 µm (3.0–6.0 mils), depending on the coating system requirements |
| Theoretical Spreading Rate | 6.3 m²/L at 100 µm (253 in²/US gal at 4.0 mil) |
| Touch Dry | 2 h |
| Recoat Interval | Minimum: 3 h; maximum: unlimited |
| Full cure time | 4 days |
| Storage shelf life | Base: at least 24 months; store in a dry and cool environment |
Curing agent: at least 24 months; store in a dry and cool environment
otherwise, additional thinner may be required to adjust the paint viscosity to a suitable application state.
8 h at 20 °C (68 °F). Note: refer to supplementary data — pot life
| Recommended thinner | Thinner 91-92 |
|---|---|
| Thinner quantity | 10–15%, depending on the required film thickness and application conditions |
| Nozzle tip size | 1.5–3.0 mm (approx. 0.060–0.110 in) |
| Nozzle pressure | 0.3–0.4 MPa (approx. 3–4 atm; 44–58 psi) |
| Recommended thinner | Thinner 91-92 |
|---|---|
| Thinner quantity | 5–10%, depending on the required film thickness and application conditions |
| Nozzle pressure | 15.0 MPa (approx. 150 atm; 2176 psi) |
|---|
| Recommended thinner | Thinner 91-92 |
|---|---|
| Thinner quantity | 0 - 5% |
| Cleaning solvent | Thinner 90-53 |
| Dry Film Thickness | Theoretical Spreading Rate |
| 75 µm (3.0 mils) | 8.4 m²/L (337 in²/US gal) |
| 100 µm (4.0 mils) | 6.3 m²/L (253 in²/US gal) |
| 150 µm (6.0 mils) | 4.2 m²/L (168 in²/US gal) |
| Subsequent coat for recoating | Recoat interval | –5°C (23°F) | 5°C (41°F) | 10°C (50°F) | 20°C (68°F) | 30°C (86°F) | 40°C (104°F) |
| Epoxy Primer 256, epoxy coating | Minimum time | 36 h | 10 h | 4 h | 3 h | 2 h | |
| 435, | Maximum time | Unlimited | |||||
Remark: unlimited maximum recoat interval applies only to the recoat interval of a coating with dry film thickness of 100 µm (4.0 mil) whose surface has absolutely never been contaminated.
| Subsequent coat for recoating | Recoat interval | –5°C (23°F) | 5°C (41°F) | 10°C (50°F) | 20°C (68°F) | 30°C (86°F) | 40°C (104°F) |
| Polyurethane Topcoat 520, | Minimum time | 3 days | 24 h | 16 h | 8 h | 5 h | 3 h |
| Polyurethane Topcoat 550 | Maximum time | Unlimited | |||||
| and various chlorinated rubber paints, | vinyl paints, |
|---|
| Substrate Temperature | Fully hard dry | Fully cured |
| -10 °C (14 °F) | 24–48 h | 20 days |
| -5 °C (23 °F) | 24–30 h | 14 days |
| 0 °C (32 °F) | 18–24 h | 10 days |
| 5 °C (41 °F) | 18 h | 8 days |
| 10 °C (50 °F) | 12 h | 6 days |
| 15 °C (59 °F) | 8 h | 5 days |
| 20 °C (68 °F) | 6 h | 4 days |
| 30 °C (86 °F) | 4 h | 3 days |
| 40 °C (104 °F) | 3 h | 48 h |
Remarks: continuous and adequate ventilation must be ensured during application and coating curing (refer to Information Sheet 1433 and Information Sheet 1434). Pot life (at a viscosity suitable for application)
| Mixed paint temperature | Pot life after mixing |
| 10 °C (50 °F) | 16 h |
| 15 °C (59 °F) | 10 h |
| 20 °C (68 °F) | 8 h |
| 30 °C (86 °F) | 5 h |
| 35 °C (95 °F) | 4 h |
Although PPG Protective and Marine Coatings is committed to providing completely consistent products to users worldwide, from time to time it may be necessary to make minor adjustments to specific products to comply with local/national regulations or environmental requirements. In the following cases, use the corresponding alternative version of the product data sheet instead.
PPG warrants (1) that it has good title to the product, (2) that the product quality conforms to the relevant technical quality specifications in force at the date of manufacture of the product, and (3) that the supplied product is free of lawful claims by third parties for infringement of US patent rights. The above warranties are limited to those given by PPG and other express or implied warranties required by applicable laws and regulations for transactions and commercial practice; any abuse contrary to the stated conditions, and any other warranty for special purposes or uses, are excluded, and PPG shall be free from liability. To claim under this warranty, the buyer must notify PPG in writing within five (5) days of discovering the quality defect, and the date must be within the product's valid storage period or within one (1) year from delivery of the product to the buyer. If the buyer fails to notify PPG of the defect as required above, this will prejudice the buyer's right to obtain compensation under this warranty from PPG!
In all cases, PPG shall not be liable for any indirect, special, incidental or consequential loss of any kind arising from or in connection with the use of this product (whether based on negligence, strict liability or tort).
The information in this product data sheet is based on laboratory tests we believe to be reliable, and is provided for guidance only.
PPG may revise this information at any time as experience accumulates and product development progresses.
All recommendations and advice concerning the use of this product, whether in technical documents, in response to an enquiry or otherwise, are given to the best of our knowledge and are believed to be reliable.
Our products and related information are provided for industrial users possessing the necessary knowledge and practical skills, and it is the end user's responsibility to determine whether the product is suitable for the specific use. The buyer, having performed such evaluation, proceeds entirely at its own risk. The quality and condition of the substrate on site, and the many other factors affecting product use and application, are beyond PPG's control. Therefore, PPG accepts no liability for any loss, injury or damage arising from the use of the information in this product data sheet (unless otherwise provided in a written agreement). Different application environments, changes to the application process or extrapolation of the reference data may result in failure to achieve the expected coating quality.
This product data sheet supersedes all previous versions. The buyer is responsible for confirming that the data sheet in hand is the latest version before using the product. The latest version is published on the official website of PPG Protective & Marine Coatings: www.ppgpmc.com. In case of discrepancy between the Chinese version and the original English version of the product data sheet, the English original shall prevail.
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