Product Focus: FP1398 General Purpose Flame Retardant Polyurethane Foam

Posted by Phil Morrison on 31-Aug-2018 11:47:01

FP1398 General Purpose Flame Retardant Polyurethane Foam

In the wake of the Grenville Tower tragedy, flame retardant foams are receiving more publicity than ever. Our FP 1398 is a water based flame retardant polyurethane foam impregnant, with acoustic/thermal insulating properties. Foam impregnated with FP 1398 will meet the requirements UL94 V0 & 94-SV, BS 476 Part 5 and BS 476 Parts 6 and 7 Building Regulations Class “O”.


  • Total Solids Content: 58.0 - 62.0
  • Viscosity, centipoise: 200 - 400
  • Specific Gravity: 1.45 - 1.49
  • pH: 8.0 - 9.0

Application Instructions

FP 1398 is applied by impregnation. Typically, a one metre wide continuous roll of slit polyurethane foam is fully immersed in a trough of FP 1398. Foam thicknesses can range from 6mm to 100mm. FP 1398 is available at 40% solids content for use on foams 12mm thick or less.

The foam passes through a nip roller below the surface of the FP 1398. The saturated foam then emerges from the impregnation trough and passes through a second nip roller, where excess material is removed. The gap in the second nip determines how much FP 1398 is applied to the foam.

Non CMHR polyurethane foam will need a minimum of 400% by weight dry add-on of FP 1398 to achieve the required fire performance. As an example, a 20 Kg/m3 foam with 400% dry add-on will have a finished density of 80 Kg/m3.

The impregnated foam then passes through a drying oven at 140 - 160oC. Drying time will depend on temperature, air flow, running speed and foam thickness. Once the water has been driven off it is important that the dried FP 1398 film of is kept at around 150oC for 2 - 3 minutes to cross link the polymer binder to achieve optimum performance.

Storage, Safety Handling

FP 1398 should be stored in sealed containers between 5 and 30°C. Protect from frost and direct sunlight. The compound has a shelf life of 6 months when stored correctly. Please refer to the technical data sheet and use appropriate protective clothing when handling.

Flame retardant impregnant compounds can be adapted to a variety of textiles – offering different levels of fire safety appropriate to the application. All our formulations are compliant with UK and EU quality standards and are tested for environmental safety. Alongside our standard range we also offer a bespoke formulation service. To find out more please chat to one of our team about your requirements and timescale.

Request A Quote

Topics: Flame Retardants

Wet Bond Adhesives - A Buyers Guide

Subscribe to Email Updates

Recent Posts