Nullifire FS702 Waterborne Intumescent Acrylic Sealant

We no longer stock this product, but can recommend Firetherm Intumastic as a great alternative.



We no longer stock this product, but can recommend Firetherm Intumastic as a great alternative.

Nullifire FS702 Waterborne Intumescent Acrylic Sealantcures to give a firm but flexible fire seal. Suitable for use in various construction movement joints up to 15%, whilst providing an excellent acoustic and air seal. 

FS702 is ideally suited for use around small annular service penetration seals in walls and floors. It can also be used for the bonding and pointing of joints and service penetrations in conjunction with Nullifire FB750 coated boards. 

Usage & Purpose

Suitable in low movement fire rated joints to seal between joints in FB750 fire rated coated batts, substrate to penetration service applications and pointing up of penetration seals. FS702 sealant may be used to provide a linear joint or gap seal with specific supporting constructions and substrates and as a penetration seal.


  •  Masonry to masonry
  •  Masonry to timber
  •  Masonry to steel
  •  FB750 to flexible wall
  •  FB750 to rigid wall 
  •  Flexible wall to flexible wall
  •  Flexible wall to rigid floor
  •  Rigid floor to rigid floor
  •  Rigid wall to rigid wall 

Features & Benefits

    • Can achieve up to 4 hours joint fire resistance tested in accordance with EN 1366-3, EN 1366-4 and ETAG 026

We no longer stock this product, but can recommend Firetherm Intumastic as a great alternative.

  • Ideal for sealing low movement joints - suitable for gaps up to 50 mm wide
  • Suitable for rigid and flexible walls
  • Used for sealing FB750 Coated Fire Batts
  • Acoustics up to 61 dB
  • Air seal up to 2,000 Pa
  • Single sided seal tested
  • Easily paintable
  • Certifire certificate: CF5347 

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 ConditionsWe 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.

It is your responsibility to read the Product Data Sheets (available below) before you place an order and prior to application of the product. The content of this website is our best recommendation and is not advice. Coverage rates quoted are approximate, you agree that coverage depends on the condition of the substrate, surface absorption, texture and application method. We ALWAYS recommend a trial area is coated to ensure the product meets your requirements before use.

Product Details

Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.

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