What it is and why choose it
Intergard 345 Part A (Base Yellow) is the base component of a two-component, high-solids, low VOC, fast-curing epoxy coating containing zinc phosphate anti-corrosive pigmentation. When mixed with its curing agent, it works as a primer/finish or as an intermediate coat over recommended anti-corrosive primers. The system provides anti-corrosive barrier protection, resistance to chemical fumes and spillages, and good abrasion resistance, making it suitable for moderately corrosive environments where fast drying and rapid recoating are required.
Main features
- Two-component epoxy system: Part A base to be mixed with Part B curing agent for interior and exterior use.
- Anti-corrosive performance: Incorporates zinc phosphate pigmentation to provide barrier protection on correctly prepared substrates.
- Fast curing and rapid recoating: Touch dry from 30 to 90 minutes and hard dry from 1 to 7 hours depending on temperature.
- High solids, low VOC: 70% volume solids with regulated VOC values according to EPA Method 24, EU Solvent Emissions Directive and Chinese GB23985.
- Semi-gloss finish: Semi gloss appearance with a wide colour range via the Chromascan system.
- Versatile application methods: Can be applied by airless spray, air spray, brush or roller.
- Good film build: Typical dry film thickness of 100–150 microns (4–6 mils) per coat for robust protection.
- Suitable for steel and concrete: Recommended for blast-cleaned steel, primed steel and properly prepared concrete or pre-cast blockwork.
- System compatibility: Can be applied directly over a range of primers such as Intercure 200HS, Intergard 251, Interzinc 52 and others, and can be overcoated with finishes like Interfine 629HS, Intergard 740, Interthane 870 and Interthane 990.
Technical specifications
General data
- Product type: Epoxy, two component (Part A base to be mixed with Part B curing agent).
- Product description: Low VOC, high solids, fast curing epoxy primer/finish containing zinc phosphate anti-corrosive pigmentation.
- Finish: Semi gloss.
- Colour range: Wide range via the Chromascan system.
- Volume solids: 70%.
- Density (mixed product weight): 1.45 kg/l (12.1 lb/gal).
- Flash point (typical): Part A 33°C (91°F); Part B 43°C (109°F); Mixed 34°C (93°F).
Film thickness and coverage
- Typical dry film thickness (DFT): 100–150 microns (4–6 mils).
- Typical wet film thickness: 143–214 microns (5.7–8.6 mils).
- Theoretical coverage: 5.60 m²/litre at 125 microns DFT with stated volume solids (225 sq.ft/US gallon at 5 mils DFT).
- Practical coverage: Allow appropriate loss factors depending on application conditions and equipment.
Drying and overcoating (with recommended topcoats)
| Temperature | Touch dry | Hard dry | Minimum overcoat | Maximum overcoat |
|---|
| 10°C (50°F) | 90 minutes | 7 hours | 7 hours | Extended |
| 15°C (59°F) | 75 minutes | 5 hours | 5 hours | Extended |
| 25°C (77°F) | 60 minutes | 2.5 hours | 2.5 hours | Extended |
| 40°C (104°F) | 30 minutes | 1 hour | 1 hour | Extended |
Note: Certain darker Chromascan colours may require increased drying and overcoating times.
Mixing and pot life
- Mix ratio: 4 parts Base (Part A) : 1 part Curing Agent (Part B) by volume.
- Mixing instructions:
- Agitate Part A thoroughly with a power agitator.
- Combine entire contents of Part B with Part A and mix thoroughly with a power agitator.
- Always mix a complete unit in the supplied proportions.
- Working pot life (after mixing):
- 10°C (50°F): 3 hours
- 15°C (59°F): 2 hours
- 25°C (77°F): 60 minutes
- 40°C (104°F): 45 minutes
Application methods
- Recommended methods: Airless spray, air spray (pressure pot), brush, roller.
- Airless spray:
- Tip range: 0.43–0.53 mm (17–21 thou).
- Total output fluid pressure at spray tip: not less than 176 kg/cm² (2503 psi).
- Maximum film build in one coat is best achieved by airless spray.
- Conventional air spray (pressure pot):
- Recommended gun: DeVilbiss MBC or JGA.
- Air cap: 704 or 765.
- Fluid tip: E.
- Brush and roller: Suitable for small areas only; typically 75–100 microns (3.0–4.0 mils) DFT can be achieved per coat. Multiple coats may be required to reach specified system DFT.
- Thinner: International GTA220 (or International GTA415). Thinning is not normally required; do not thin more than local environmental legislation allows.
- Cleaner: International GTA220 or International GTA415 for equipment cleaning and flushing.
- Work stoppages and clean-up: Do not allow material to remain in hoses, guns or spray equipment. Thoroughly flush with GTA220. Once units are mixed they should not be resealed; after prolonged stoppages, restart with freshly mixed units.
Substrate preparation
Steel and primed steel
- All surfaces must be clean, dry and free from contamination.
- Assess and treat surfaces in accordance with ISO 8504:2000.
- Oil and grease: remove in accordance with SSPC-SP1 solvent cleaning.
- Abrasive blast cleaning:
- Bare steel: blast to Sa2½ (ISO 8501-1:2007) or SSPC-SP6.
- Recommended surface profile: 50–75 microns (2–3 mils).
- If oxidation occurs between blasting and application, reblast to the specified standard.
- Suitable for surfaces initially blasted to this standard and allowed to deteriorate (under good shop conditions) for up to 7–10 days, provided they are at least Sa2 and free from loose powdery deposits.
- Previously primed surfaces:
- Blast clean weld seams and damaged areas to Sa2½ (ISO 8501-1:2007) or SSPC-SP6.
- If the shop primer shows extensive breakdown, overall sweep blasting may be required.
Concrete and pre-cast blockwork
- Suitable for application to concrete substrates.
- Concrete should be cured for a minimum of 28 days prior to coating, with moisture content below 6%.
- Surfaces must be clean, dry and free from curing compounds, release agents, trowelling compounds, surface hardeners, efflorescence, grease, oil, dirt, old coatings and loose or disintegrating concrete.
- All poured and precast concrete should be sweep blasted (preferred) or acid-etched to remove laitance.
- For the first coat on concrete, thin Intergard 345 by 10–15% with International Thinners to provide good penetration and act as a primer/sealer.
Environmental and application conditions
- This product will not cure adequately below 5°C (41°F). For maximum performance, ambient curing temperatures should be above 10°C (50°F).
- Surface temperature must be at least 3°C (5°F) above dew point.
- When applying in confined spaces, ensure adequate ventilation.
- In moderately corrosive environments, specify a minimum of 100 microns (4 mils) DFT for suitable anti-corrosive performance.
- In low corrosive environments equivalent to ISO 12944 C2, a single coat at 80 microns (3.2 mils) DFT is acceptable.
- Condensation during or immediately after application may result in a matt finish and inferior film.
- Like all epoxies, the coating will chalk and discolour on exterior exposure; this does not detract from anti-corrosive performance, but for durable cosmetic finish and gloss/colour retention, overcoat with recommended topcoats.
VOC information
- VOC (EPA Method 24): 2.67 lb/gal (320 g/l).
- VOC (EU Solvent Emissions Directive – Council Directive 2010/75/EU): 235 g/kg.
- VOC (Chinese National Standard GB23985): 214 g/l.
- VOC values are typical and provided for guidance only; they may vary with colour and normal manufacturing tolerances.
Storage and shelf life
- Shelf life: Minimum 18 months at 25°C (77°F), subject to re-inspection thereafter.
- Storage conditions: Store in dry, shaded conditions away from direct sunlight and sources of heat and ignition. Keep containers tightly closed.
Pack sizes and weights
- Pack size examples:
- 20 litre unit: Part A 16 litres (approx. 26.8 kg); Part B 4 litres (approx. 4.3 kg).
- 5 US gallon unit: Part A 4 US gal (approx. 50 lb); Part B 1 US gal (approx. 8.6 lb).
- For availability of other pack sizes, contact AkzoNobel.
Applications and use cases
- Steel structures in moderately corrosive environments: Provides barrier and zinc phosphate-based anti-corrosive protection where fast drying and rapid recoating are required.
- Maintenance and new construction: Suitable as a one- or two-coat primer/finish system or as an intermediate coat over recommended anti-corrosive primers on blast-cleaned or shop-primed steel.
- Concrete floors and structures: When properly prepared and primed/sealed with thinned Intergard 345, it can be used on interior or exterior concrete where an epoxy coating is appropriate.
- Systems requiring quick return to service: Fast curing characteristics support reduced downtime in industrial environments.
FAQ
1. Is Intergard 345 suitable as a single-coat system?
Yes. It is suitable for use as a one- or two-coat primer/finish. In low corrosive environments (equivalent to ISO 12944 C2), a single coat at 80 microns DFT is acceptable. In moderately corrosive environments, a minimum of 100 microns DFT is recommended.
2. On which substrates can I apply Intergard 345?
It is suitable for application to abrasive blast-cleaned steel, properly prepared and compatible primed steel, and correctly prepared concrete or pre-cast blockwork substrates.
3. What surface preparation is required for steel?
Steel should be abrasive blast cleaned to Sa2½ (ISO 8501-1:2007) or SSPC-SP6 with a surface profile of 50–75 microns (2–3 mils). Surfaces must be clean, dry and free from contaminants such as oil and grease.
4. Can Intergard 345 be applied by brush or roller?
Yes. Brush and roller application is suitable for small areas. Typically 75–100 microns DFT can be achieved per coat, and multiple coats may be necessary to reach the specified system thickness.
5. What are the recommended application conditions?
Apply when the ambient and substrate temperatures are above 5°C (41°F), with surface temperature at least 3°C (5°F) above dew point. For maximum performance, ambient curing temperatures should be above 10°C (50°F). Ensure adequate ventilation, particularly in confined spaces.
6. Does the coating chalk or discolour outdoors?
Yes. In common with all epoxies, the coating will chalk and discolour on exterior exposure. This does not negatively affect its anti-corrosive performance, but when long-term cosmetic appearance is important it should be overcoated with recommended topcoats.
7. Is thinning required?
Thinning is normally not required. In extreme application conditions, consult the local representative. Do not thin more than allowed by local environmental legislation. For the first coat on concrete, thinning 10–15% with International Thinners is recommended to act as a primer/sealer.
8. How should equipment be cleaned after use?
Clean all application equipment immediately after use with International GTA220 (or International GTA415). Periodically flush spray equipment during the working day to prevent build-up.
9. Can previously blasted steel, left in the shop, be coated without reblasting?
Yes, provided it was initially blasted to the specified standard and has deteriorated only to Sa2 under good shop conditions for up to 7–10 days, with no loose powdery deposits. If oxidation is heavier, reblasting to the specified standard is required.
10. What safety classification does the product have?
According to Regulation (EC) No. 1272/2008, the mixed product is classified as: Flam. Liq. 3 (H226), Skin Irrit. 2 (H315), Eye Dam. 1 (H318), Skin Sens. 1 (H317), STOT SE 3 (H335) and Aquatic Chronic 2 (H411).
Section 14 – Transport information
- UN number / ID number: UN1263.
- UN proper shipping name: PAINT.
- Transport hazard class: Class 3 (flammable liquid).
- Packing group: III.
- Environmentally hazardous / marine pollutant:
- ADR/RID: Yes (environmentally hazardous); the environmentally hazardous substance mark is not required for packages ≤5 L or ≤5 kg.
- IMDG: Marine pollutant. Identified marine pollutants include trizinc bis(orthophosphate) and reaction product: bisphenol-A-(epichlorhydrin); epoxy resin. The marine pollutant mark is not required for packages ≤5 L or ≤5 kg.
- IATA: Environmentally hazardous substance mark may appear if required by other transport regulations.
- ADR tunnel restriction code: (D/E).
- Emergency schedules (IMDG): F-E, S-E.
- Special precautions for user: Within user premises, always transport in closed, upright and secure containers and ensure that personnel know what to do in case of accident or spillage.
- Transport in bulk according to IMO instruments: Not applicable.
Section 8 – Individual protection measures
The following information is based on the Safety Data Sheet for Intergard 345 Base Yellow Part A and applies to professional and industrial users handling and applying the product.
Engineering controls and hygiene
- Use only with adequate ventilation. Apply process enclosures or local exhaust ventilation to keep airborne concentrations below occupational exposure limits and below lower explosive limits.
- Use explosion-proof ventilation and electrical equipment.
- Wash hands, forearms and face thoroughly after handling, before eating, drinking, smoking and at the end of the working period.
- Contaminated work clothing should not leave the workplace; wash before reuse.
- Ensure that eyewash stations and safety showers are close to the workstation.
Eye and face protection
- Wear safety eyewear complying with an approved standard.
- Where splashes, mists, gases or dusts may occur, use chemical splash goggles and/or a face shield.
- If inhalation hazards exist, a full-face respirator may be required instead of goggles.
Hand protection
- Wear chemical-resistant, impervious gloves complying with an approved standard.
- For prolonged or frequently repeated contact, use gloves with protection class 6 (breakthrough time > 480 minutes according to EN374). Recommended: Viton or nitrile, thickness ≥ 0.38 mm.
- For brief contact, use gloves with protection class 2 or higher (breakthrough time > 30 minutes according to EN374). Recommended: nitrile, thickness ≥ 0.12 mm.
- Check with the glove manufacturer regarding breakthrough times; replace gloves regularly and immediately if damaged.
Body and skin protection
- Select personal protective clothing based on the specific task and risks; approval by a specialist is recommended.
- Where there is risk of ignition from static electricity, wear anti-static protective clothing including overalls, boots and gloves compliant with EN 1149.
- Use appropriate protective footwear and any additional skin protection measures as required by the risk assessment.
Respiratory protection
- Where ventilation is insufficient or exposure limits may be exceeded, wear a respirator conforming to EN140 with type A/P2 filter or better.
- Respirators must be used within a formal respiratory protection programme to ensure correct selection, fitting and training.
- Dry sanding, flame cutting and welding of the dry film can produce hazardous dust and fumes; use wet sanding where possible and suitable respiratory protection if exposure cannot be otherwise controlled.
Environmental exposure controls
- Check emissions from ventilation and process equipment to ensure compliance with environmental legislation.
- Where necessary, install fume scrubbers, filters or modify process equipment to reduce emissions to acceptable levels.
- Avoid dispersal of spilled material and prevent entry into drains, waterways and soil.
*Contenido generado por IA
