Nullifire SC601 On-Site & Off-Site Intumescent Base Coat is a single pack acrylic thin film intumescent basecoat for the protection of internal and semi-exposed structural steelwork, optimised to provide up to 60 minutes fire protection as well as a limited range of sections for longer protection times.

SC601 is designed for on-site or off-site application.

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• Features & Benefits
• Surface Preparation
• Application Notes
• Loading Information
• Technical Data

Features & Benefits

• Intumescent paint for steel
• Easy to apply with simple application
• Designed for on-site or off-site application by airless spray
• Consistent and reliable, requiring less remedial work
• Excellent flow characteristics resulting in less defects for a high quality decorative finish
• Can be applied from 5°C to 35°C
• Fast drying (compared to water based products in cold or humid conditions) for a quick turn around and shorter sites times for contractors
• Touch dry in 30 minutes (at 20°C)
• Recoat after 4 hours (at 20°C)
• Single pack acrylic thin film intumescent basecoat
• Protects of internal and semi-exposed structural steelwork
• Up to 60 minutes fire protection
• Competitive loadings
• Compatible with various primers and topcoats

Surface Preparation

Protective Equipment

• USE IN WELL VENTILATED CONDITIONS and ensure all recommended protective equipment is worn during handling & use of this product
• For full recommendation, refer to safety data sheet

 Substrate Preparation

SC601 should only be applied onto a clean, undamaged, dry, blasted Sa 2.5 and primed steel surface.

• For recommended primers and topcoats, please consult the Nullifire Approved Primer or Approved Topcoat list
• Nullifire has carried out compatibility testing on a wide range of primers and topcoats. Call Rawlins Paints Technical on 0113 2455450 (option 2) or [email protected] for confirmation of compatibility with SC601
• The primer must be applied in accordance with the manufacturer’s instructions

 Pre-Treatment of Substrates

• All mill-scale must be removed and a blast profile of at least 50 microns and a cleanliness of Sa 2.5 must be achieved before application of recommended primer

Application Notes

Necessary Tools

Airless spray equipment is recommended and should match these guidelines:

• Operating Pressure: Min 3100psi (218 kg/ cm²)
• Tip Size: 19 – 25 thou
• Fan Angle: 20° – 40°
• Hose Diameter: 10 mm (3/8”) (internal diameter)
• Hose Length: Max. 30 metres.

Inline filters should not normally be used.

Primer

• For recommended primers, please call Rawlins Paints Technical on 0113 2455450 (option 2) or [email protected] for confirmation of compatibility with SC601
• Nullifire has carried out compatibility testing on various primers, but have no control over primer consistency from other manufacturers
• The primer system shall not exceed 150 microns DFT total, with an absolute maximum allowable in overlap areas only of 200 microns DFT
• Primed steel surfaces that are visibly high in gloss must be abraded/sanded to a matt finish
• The primer must be applied in accordance with the manufacturer’s instructions
• It is recommended as best practice that a small test patch or area be prepared with the intumescent before commencing the full intumescent coating application to ensure that there are no issues with compatibility, adhesion or drying, etc.

Topcoat

• For recommended topcoats, please call Rawlins Paints Technical on 0113 2455450 (option 2) or [email protected] for confirmation of compatibility with SC601
• Nullifire has carried out compatibility testing on various topcoats, but have no control over topcoat consistency from other manufacturers
• The type, DFT and number of layers of topcoat must be in accordance with the specification
• Specifications will be driven by the Nullifire Specification Guidance or the appropriate product ETA
• The topcoat must be applied in accordance with the manufacturer’s instructions
• It is recommended as best practice that a small test patch or area be prepared before commencing the full application to ensure that there are no issues with compatibility, adhesion or drying, etc.

Mixing & Thinning

• Nullifire intumescents are supplied without the need to add thinners for application, and is not recommended
• However, if necessary, xylene (FC150) may be added up to a maximum of 2%.
• Thinning may impact the ability of the coating to hold up at the recommended WFT
• SC601 should be mechanically stirred prior to use until homogeneous

 Cleaning

• Dried on paint may be removed using a paint scraper. Spray equipment must only be cleaned using xylene (FC150)

Loading Information

Refer to the Loading Tables Data Sheets from the 'Data Sheets' Tab for information on:

• Beams
• Columns
• 4 sided hollow columns & hollow beams
• 3 sided hollow beams

Technical Data

IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY and our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with Condition 8 of the Terms and Conditions and should be applied only by an individual with the necessary expertise and experience. We will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.