Construction and repair projects often face hidden challenges beneath the ground.
Shifting soils, underground voids, uneven foundations, and aging infrastructure can threaten safety, timelines, and budgets. FSI’s geotechnical polyurethane foams provide reliable solutions that address these challenges with speed, efficiency, and long-term performance.
Engineered to be lightweight yet incredibly strong, our foams expand to fill voids, stabilize soil, and support structures. Unlike traditional methods that require excavation or heavy machinery, geotechnical foam provides a fast, clean, and permanent solution. Its versatility makes it ideal for both residential repairs and large-scale infrastructure projects.
Whether supporting pipelines, filling voids, stabilizing soil, or leveling concrete, FSI geotechnical foams deliver speed, durability, and reliability to keep projects on schedule and safe.
Trench Break™ – Strong Support for Critical Infrastructure
Trench Break™ closed-cell rigid polyurethane foam is designed for demanding geotechnical applications where stability and speed are essential. Lightweight and durable, it expands to fill voids and reinforce soil quickly, helping projects stay on track with minimal disruption.
Common applications include:
- Pipeline pads, pillows, and rapid supports
- Void filling for sinkholes and mine shafts
- Soil compaction and stabilization
- Foundation lifting
- Bridge and runway repair
Benefits of Trench Break™:
- Rapid installation saves time and labor
- Durable and reliable in challenging soil and environmental conditions
- Lightweight for easy handling in hard-to-reach locations
- Cost-effective alternative to traditional methods
Trench Break™ is trusted across energy, transportation, municipal, and industrial projects for its consistent, long-lasting performance.


FoamJack® – Fast, Durable Concrete Leveling
FoamJack® expanding rigid polyurethane foam is a fast, permanent solution for lifting, leveling, and stabilizing concrete without excavation or slab replacement. Its injection process fills voids beneath the concrete and gently lifts slabs to their original level, curing in minutes for a stable foundation.
Ideal applications include:
- Foundations
- Roads and sidewalks
- Driveways, steps, patios, and pool decks
- Garages and other concrete surfaces
Advantages over traditional mudjacking:
- Requires smaller, less noticeable injection holes
- Lightweight and easy to transport to difficult job sites
- Expands to fill voids and compress loose soil
- Displaces water to prevent future soil washout
- Cures quickly for minimal project disruption
Proven performance since 1988:
- Works in sand, rock, and poor soil conditions
- All-season product available year-round
- Permanently levels concrete in as little as 15 minutes
- Non-hazardous, HFC-free, zero GWP, zero ODP, and no VOCs
- Made in the USA
FoamJack® is trusted by contractors and project owners alike for clean, fast, and durable concrete repairs.


Why Choose FSI Geotechnical Foam
With decades of polyurethane expertise, FSI develops products that deliver consistent, field-proven performance. Our geotechnical foams are designed to:
- Reduce labor, equipment, and excavation costs
- Perform reliably in challenging soil and environmental conditions
- Save time with fast installation and rapid curing
- Provide long-term structural support for residential, commercial, and industrial projects
- Offer sustainable, safe formulations
Build Strong Foundations with FSI
FSI geotechnical foams provide solutions that work beneath the surface to keep projects secure, efficient, and long-lasting. Whether stabilizing pipelines, filling voids, reinforcing soil, or leveling concrete, Trench Break™ and FoamJack® deliver the strength, reliability, and versatility your project demands.
Contact FSI today to learn how our geotechnical foam solutions can support your next project.