PPG SIGMASHIELD 420 LT Abrasion-resistant Epoxy Coating 420 LT is an epoxy coating. Two-component high-solids reinforced polyamine-adduct-cured epoxy coating. Suitable as the intermediate coat in abrasion-resistant protective systems for the underwater bottom and waterline areas of ship hulls. Specifications on this page: volume solids 81 ± 2%, DFT 125-200 µm (5.0-8.0 mil) depending on system requirements, theoretical spreading rate 5.4 m²/L. Comparable products of the same brand and type: AMERCOAT 114 A Epoxy Filler 114 A, AMERCOAT 240 SIGMACOVER 240 High-solids Multi-purpose Epoxy 240, AMERCOAT 370 Rapid-dry Multi-purpose Epoxy Coating 370.
Parameter source: PPG original technical data sheet (TDS) “PPG SIGMASHIELD 420 LT Abrasion-resistant Epoxy 420 LT (Winter Grade)”; values such as spreading rate are converted from TDS parameters and are for 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 | 81 ± 2% |
|---|---|
| Dry Film Thickness | 125–200 µm (5.0–8.0 mils), depending on the coating system requirements |
| Theoretical Spreading Rate | 5.4 m²/L |
| VOC | Maximum 123.0 g/kg (EU Directive 1999/13… |
| Density / Specific Gravity | 1.6 kg/L (13.4 lb/US gal) |
| Number of Components | Two-component |
| Thinner | Thinner 91-92 |
| Recoat Interval | Minimum: 10 h; maximum: 14 days |
| Introduction | A two-component, high-solids, performance-enhanced, polyamine-adduct-cured epoxy coating |
|---|
| Number of Components | Two-component |
| Density | 1.6 kg/L (13.4 lb/US gal) |
| Volume solids | 81 ± 2% |
| VOC (as supplied) | Maximum 123.0 g/kg (EU Directive 1999/13/EC, SED) |
Maximum 191.0 g/L (approx. 1.6 lb/gal) (theoretical calculated value)
| Recommended dry film thickness | 125–200 µm (5.0–8.0 mil) depending on the coating system requirements |
| Theoretical Spreading Rate | 5.4 m²/L at 150 µm (217 inch²/US gal at 6.0 mil) |
4.1 m²/L at 200 µm (162 inch²/US gal at 8.0 mil)
| Recoat Interval | Minimum: 10 h; maximum: 14 days |
| Full cure time | 7 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
but in this case, the degree of cure required for the coating to reach the expected hardness may take a long time. However, as the temperature rises, the coating will achieve full protective performance after complete cure.
application state.
| Induction Time | Not required |
|---|
1 h at 10 °C (50 °F). Note: refer to supplementary data — pot life
| Recommended thinner | Thinner 91-92 |
|---|---|
| Thinner quantity | 5–10%, depending on the required film thickness and application conditions |
| Nozzle tip size | 1.7–2.0 mm (approx. 0.070–0.079 in) |
| Nozzle pressure | 0.3–0.4 MPa (approx. 3–4 atm; 44–58 psi) |
| Recommended thinner | Thinner 91-92 |
|---|---|
| Thinner quantity | 0–10% for a dry film thickness of 100 µm (4.0 mil); 0–5% for a dry film thickness of 200 µm (8.0 mil). |
| Nozzle tip size | Approx. 0.53–0.69 mm (0.021–0.027 in) |
| 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 |
| 100 µm (4.0 mils) | 8.1 m²/L (325 inch²/US gal) |
| 150 µm (6.0 mils) | 5.4 m²/L (217 inch²/US gal) |
| 175 µm (7.0 mils) | 4.6 m²/L (186 inch²/US gal) |
| 200 µm (8.0 mils) | 4.1 m²/L (162 inch²/US gal) |
Note: maximum dry film thickness for brush application: 75 µm (3.0 mil). Overcoating interval for a 150 µm (6.0 mil) dry film thickness
| Subsequent coat for recoating | Recoat interval | -10°C (14°F) | 0°C (32°F) | 5°C (41°F) | 10°C (50°F) | 15°C (59°F) |
| Overcoatable with various epoxy coatings | Minimum recoat interval | 48 h | 24 h | 10 h | 5 h | 4 h |
| Maximum time | 28 days | 14 days | 10 days | |||
| Recoat with polyurethane topcoat | Minimum recoat interval | 3 days | 48 h | 36 h | 24 h | 16 h |
| Maximum time | 28 days | 14 days | 10 days | |||
| Substrate Temperature | Fully hard dry | In service — immersion allowed | Fully cured |
| -10 °C (14 °F) | 34 h | 18 days | -- |
| 0 °C (32 °F) | 17 h | 10 days | 28 days |
| 5 °C (41 °F) | 12 h | 7 days | 14 days |
| 10 °C (50 °F) | 6 h | 5 days | 7 days |
| 15 °C (59 °F) | 4 h | 4 days | 5 days |
(PPG Protective & Marine Coatings) Technical Support and Service.
| Mixed paint temperature | Pot life after mixing |
| 5 °C (41 °F) | 2 h |
| 10 °C (50 °F) | 1 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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Packaging specifications and batch lead times are subject to actual availability. PleaseContact Uscontact us for project-based calculation.
