Geofoam is made of EPS, an inert polymer suited to permanent burial. It’s super lightweight, with impressively long-term compressive strength; it is a rigid plastic block used as construction backfill to replace soil, reducing the body mass by 99% with compressive resistance up to 280 kPa at 1% deflection.

Geofoam is used in civil engineering to support conventional surcharge on weak ground, reduce preload timing, protect buried utilities, and save overall cost. Construction becomes more efficient when importing fill and heavy compaction equipment are not needed; particularly in limited-space situations, when EPS is self-standing, operation becomes simpler, lighter, safer, and tidier.