Jablite is the UK's largest producer of EPS products for insulation and civil engineering applications



Jablite Fillmaster is often specified to replace traditional fill materials in civil engineering projects. Using traditional fill materials can cause unacceptable vertical or horizontal stresses in weak underlying soils or against structures.

These stresses can be reduced by specifying Jablite Fillmaster, a lightweight fill available in a range of grades to meet the required compression performance. Fillmaster is also used for temporary access solutions, sheet pile infill panels and secant guide wall and other concrete void formers.

Key Benefits
  • Excellent compression properties
  • High-strength-to-weight ratio
  • Lightweight
  • Resistant to moisture
  • Durable
  • Inhibits water absorption
  • Contains flame retardant additive
  • Manufactured from EPS (expanded polystyrene)
  • EPS has an A+ rating in the BRE Green Guide to Specification

Consult a Civil Engineer about your project

Interested in Jablite product for a new project? Discuss with our civil engineer Darren Evans.

Click here

Request a Civil Engineering CPD

Once all the fields are filled in, please click submit and one of our team will get back to you.

Click here
Downloads & Specifications

BBA Certificates and other supporting documents can be found in Technical Resources

Technical Resources
Technical information
Product specification


Fillmaster Grade

Fillmaster Grade FM



















Nominal Density (Kg/m3)

15 20 25 31 34 38 43 48 55
Compressive Strength at 1% Compression (kN/m2) 20 45 70 90 100 120 140 160 190
Compressive Strength at 10% Compression (kN/m2) 70 100 150 200 250 300 350 400 500
Shear Strength (kN/m2) 55 75 100 200 170 225 260 300 375
Shear Modulus (kN/m2) 2100 2800 3400 4100 4800 5400 6100 6800 7400

Jablite Fillmaster is used for:

• Road construction and widening
• Bridge abutments and underfill
• Culverts
• Rail embankments and platforms
• Floor raising
• Landscaping
• Noise bunds
• Retaining walls

Fillmaster negates the need for specialised foundations or long ground preloading times in:

  • Areas adjacent to existing embankments
  • Areas of unstable ground
  • Areas of weak or compressible soil
  • Sites where access is difficult or restricted
  • Transitions between bridges or underpasses and normal fill materials
+Does Jablite manufacture to ISO 14001?
Yes, Jablite is certified to the BS EN ISO 14001 Environmental Management System standard.
+Is Jablite accredited to ISO 9001?
Yes, all Jablite sites are accredited to BS EN ISO 9001 Quality Management System.
+What is the maximum bow on a Fillmaster block?
The maximum bow is 5mm over the length of block.
+Can custom block sizes be made in Fillmaster?
A standard block size is 2440 x 1220mm x 610mm. Bespoke sizes are also available on request.
+What are the tolerances for Fillmaster?
The tolerances are ±4mm on width and ±6mm on length.