Seal-it® 472 PU-FIRE FOAM

Seal-it® 472 PU-FIRE FOAM is a durable flame and fire-retardant 1k insulation and installation foam, specially developed for flame and fire-retardant joint seals between various building components, up to a maximum joint width of 40 mm, and that moisture-cures into a durable foam mass.



  • Particularly suitable for flame and fire-retardant sealing, insulation and filling of connecting joints, seams, cracks and holes in interior and exterior façades, cavity walls, partitions and ceiling, roof and floor components.
  • Seal, insulate and fill pipe and line penetrations through ceilings, roofs, floors and interior and exterior walls.
  • Seal, insulate and fill adjustment and installation spaces around prefab components, sections and door and window frames.
  • Adhere, install, insulate and seal between different insulation panels/boards and panel materials in the construction of roofs, façades, floors and interior and exterior walls.
  • Seal, insulate and fill connections in ridges, dormers, chimneys, air exhaust ducts and bay windows.
  • Fill, seal and insulate hollow spaces/holes in roofs, floors, façades, ceilings and interior and exterior walls.


  • Flame and fire-retardant quality, tested according to EN 1366-3 & EN 1366-4 B1.
  • Adheres excellently to many materials, such as stone, concrete, stucco, masonry, gypsum, wood, metal and various plastics, such as Styropor, hard PU foam, polyester and hard PVC.
  • Excellent acoustic and insulating properties.
  • Very low emission: certified VOC emission class A+.
  • High output, approx. 45 litres at free expansion.
  • Fast-curing, fine-celled and easy-to-cut polyurethane foam.
  • Foams during the curing process, high filling capacity.
  • Lasting resistance to weather, water, moisture and ageing; does not rot.
  • Simple, easy and clean application with the Seal-it® PU gun.
  • Excellent resistance to hot and cold temperatures, water and many chemicals.

Application conditions

  • Application temperature (ambient and surface) between +5°C and +40°C.
  • On compatible, stable, clean, uncontaminated and grease-free surfaces.
  • Use a suitable brush to remove any loose particles from the surface.
  • Degrease the surface properly using Seal-it® 510 CLEANER.
  • Give the canister approx. 20 good shakes before use.
  • If necessary, use a plant sprayer to lightly moisten the surface in advance.
  • Cut off fully cured excess Seal-it® 472 PU-FIRE FOAM with a knife and/or trowel.
  • Before use, grease the threading of the gun adapter with Vaseline, PTFE and/or silicone spray, to prevent the canister sticking to the PU gun.
  • After securing the canister in the gun, the spray speed and output volume are adjustable using the setscrew on the back of the gun for efficient/economic use.
  • When not in use, tighten the setscrew on the back of the PU gun until it is closed so the PU gun can no longer be activated.
  • Always leave the canister in the PU gun until it is completely empty.
  • Remove the empty canister by holding in the trigger while unscrewing it in order to expel any remaining propellent gas.
  • Next, reload the PU gun with a full canister and/or clean the PU gun thoroughly using Seal-it® 450 PUR CLEANER.
  • If the PU gun is not working properly, put Seal-it® 450 PUR CLEANER on the PU gun. Spray through several times and let set well for approx. 15 min. Spray through again and then remove the Seal-it® 450 PUR CLEANER canister.

Standard product line


12 x 750ml canister



SI-XXX-XXXX-XXX = Article number.
Other colours and/or packaging on request.


  • EN 1366-3/EN 1366-4
  • VOC emission class A+

Technical support department

Connect Products has a state-of-the-art R&D laboratory, where experienced specialists continuously research and develop sealants, adhesives and PU foams. Customers and clients can have products researched, tested and developed by this department. You can also contact us for technical advice, tips, project support, warranty certificates, requests and other technical questions. We will be happy to assist you with high-quality technology.

Call us on +31 (0)183 731 400 or send us an e-mail.

Product selector

Click on one of the Seal-it® or Cover-it® categories for extensive product information on applications, properties, the standard product line, application conditions, test reports, certificates and technical and safety data sheets.