Nullifire SC601 On Site & Off-Site Intumescent Base Coat

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.

Quick Links – Click To Jump To Section:

   
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 technical@rawlinspaints.com 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 technical@rawlinspaints.com 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 technical@rawlinspaints.com 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

Property
Result

Certification

Certifire CF5767
BS476 Part 20/21
Cellular Beams YB5
EN13381-6 Concrete Filled Hollow Tubes
EN13881-10 Solid Steel Rods

Building Classification
C1, C2, C3 and C4 environments only

For full details, please consult Nullifire Specification Guidelines

Construction Phase
6 months with a topcoat once fully dried (see environmental resistance)

Specific Gravity
1.36 ±0.02

Volume Solids
72% ±3%

VOC
317 g/litre

Recommended Thickness Per Coat

DFT – 720 microns max.
WFT – 1000 microns max.
Higher thickness’s may be possible, but will impact the drying times. These thickness’s are recommended for optimum film build and drying balance.

Consumption
916g/m² @ 500 µm DFT

Average Drying Times (at 20°C)
To Touch – 30 minutes

To Recoat – 4 hours

To Handle – variable depending on conditions

These figures are given as guidance only. Other factors such as air movement, temperature and coating thickness must be considered.

Service Temperature
5°C to 35°C

Application Temperature
5°C to 35°C

Temperatures above 35°C, thermoplasticity may be observed

Storage
Store in secure, dry warehouse conditions between +0°C and +35°C

Shelf Life
12 months when stored as recommended in original unopened container

 
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.