Astro ISS-S Paint is an intumescent paint system providing fire resistance to structural steel and cast iron of up to 120 mins with a minimum number of coats. A compatible decorative overcoat system ensures the system will enhance the building’s architectural and design features. Recommended for external exposed steel not subject to pooling water.

How it works

The heat of a fire triggers a catalytic reaction, causing the expansion of an insulating char layer up to 50 times the paint thickness. This layer keeps the steel below its critical temperature, thus maintaining the structural integrity of the building.

Fire testing

Product performance assessment is based upon UKAS/EGOLF Fire Test Laboratory Certification to BS 476 Part 21 - Fire Resistance to load bearing elements of structures. For certification and compliance with regulations the manufacturer will supply a Certificate of Supply on request.

Preparation and Pretreatment

Steel and cast iron should be free from rust and millscale and primed with Astro HBP Primer, to 75 microns DFT (or alternative good quality anti-corrosive primer compatible with intumescent paints) in accordance with manufacturers instructions. Treat galvanised surfaces with “T” wash/Mordant solution & prime with zinc phosphate or other primer for steel. Astro HBP Primer, may be left without further overcoating or decorated with appropriate conventional paint where no fire resistance is required.

To Specify

• Dry Internal: Apply Astro ISS-S Paint in accordance with Astroflame film thickness schedule to acheive 30, 60, 90, 120 min.
• Visible external exposed during construction or occasional modest damp internal areas: Also apply 1 good coat Astro FR Paint.
• Not suitable for areas subject to “pooling” water.
• Wet or External Under Cover: Apply 2nd coat Flame Retardant paint.
• Full External Exposure - Contact Technical Dept.

We are happy to provide a quote please fill in our structural steel specification form to ensure we cover all aspects of your fire protection and decorative requirements in our quote.We accept any order size

Prior to application the contractor should contact the Astroflame Technical Department (see below) to obtain a basecoat application schedule.

For help please speak to the technical team on: >> Tel: 01329 844 500 or >> Email: sales@astroflame.com

Application

• Astro ISS-S Paint may be applied by brush, roller or airless spray. To achieve the best finish in the shortest time, spray application is recommended. Prior to application the contractor should contact the Technical Department and obtain a basecoat application schedule. To assist correct application in accordance with this schedule, a wet film gauge will be supplied with the order. Further wet film gauges will be provided on request.
• Maximum wet film thickness per brush coat – 600 microns
• Maximum wet film thickness per spray coat – 1000 microns

Recoating

Brush/roller application

• Surface touch dry: minimum 2 hours, handle min 24hrs
• Recoat: minimum 6 hours
• Overcoating with Flame Retardant finish: minimum 24 hours

Spray application

• Surface touch dry: minimum 4 hours, handle min 24 hrs
• Recoat: minimum 12 hours
• Overcoating with Flame Retardant finish: minimum 48 hours

Spray Equipment

Airless Spray Pump

Use equipment recommended by manufacturer for the application of high viscosity intumescent paints.

• Filter size 30 mesh. 10mm hose 3/8” diameter with no whip end

Tip Size

• Tip Size 321, 323, 421, 423

Care should be taken to clean filters regularly. Cleaning should be undertaken with xylene / cellulose thinners.

Colours, Finishes & Sizes

A range of hard, high quality, weather resistant decorative finishes matches the decor, architectural or historic features of a building while helping to make it a safer structure.

• Available in BS4800, RAL and metallic colours and a non decorative finish for unexposed areas.
• Eggshell............... BS4800 + RAL.
• One-coat gloss..... BS4800 + RAL.
• Metallic................ Steel, gunmetal, rust, silver, gold.
• Non decorative..... N/A - For dry, hidden areas only.

Sizes: (ISS-S intumescent Steel Coating) 20kg, 5kg, 2.5kg
Colours: (FR Paint) BS4800 or RAL colours
Topcoat: Astro FR Paint Eggshell available in 5kg and 2.5kg

Composition

Intumescent compounds and resin binders, with high opacity pigments.

VoC

The EU VoC limit for structural steel intumescent paints is 500 gm / litre. This product contains 398 gm / litre.

Technical Advisory And Estimating Service

Our in-house estimators provide realistic, confidential guidance on project costings to contractors and quantity surveyors. They also provided expert advice and assistance with all aspects of specification and application.

Application Conditions

• Maximum Relative Humidity 80%
• Minimum ambient temperature 4°C
• Minimum Steel Temperature 3°C above Dew Point

For data sheets, test reports and more information please copy and paste this link into your browser: https://www.astroflame.com/intumescent-paint-steel.html