Slab Jacking

Our polyurethane slab lifting raw material system breaks through the traditional rigid foam solution, upgrading the "rigid" system to a more resilient "tough" structure. It is not easy to crack under high-pressure environments and is suitable for a variety of complex foundation repair conditions.

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What is Slab Jacking?

Polyurethane slab lifting material is a two component foaming material that reacts and expands under the foundation to form high-strength closed-cell foam. It can quickly fill gaps and reinforce the soil layer to achieve precise lifting of the floor and foundation, providing you with a foundation repair solution that does not require excavation, cures quickly, and is highly efficient to construct.

Base System Introduction Of Slab Jacking Material

Component	Appearance	Viscosity cps	Density kg/m3
Part A – Polyol	Yellow to light Brown Liquid	320	1.00
Part B – ISO	Dark Brown	240	1.24
Accelerator1		500	1.00

Fields Of Application

Stabilisation of fractured rock, sands and gravels and land-fill materials
Void filling
Repair of concrete structures
Fields of applicationControl of high volume water ingress

Features And Benefits

Fast reacting material where structural strength or rigidity is required;
System can cured with and without water condition, as a significant safety advantage;
When in contact with water, the product forms a rigid foam. Without the presence of water, the product also reacts and forms a stiff, rubber-like material;
Modification of the reaction can be achieved using a separately supplied accelerator and thixotropic agent to BASE PARTA system.

Technical Breakthroughs Of SPC Slab Jacking Material

Lower viscosity

Viscosity of 300–400 allows for more uniform mixing and enhanced penetration.

Biological-based structure

Provides superior adhesion to soil and gravel.

Suitable for multi-environment curing

Fully reacts in both wet and dry conditions.

Modular application design

Meets diverse construction needs, including foundation reinforcement, ground elevation, and water blocking.

Stable and adjustable reaction

Precisely control curing speed by adding accelerators or adjusting the bulk material ratio.

Localized adjustment

Locally adjustable performance extends shelf life and ensures long-term construction quality.

We Offer One-stop Solution

We are committed to providing customers with one-stop solutions for raw materials and equipment, covering a full range of services from raw material procurement to equipment supply, helping enterprises to operate efficiently and reduce costs.

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Slab Jacking Material Solution

Easy handles and reliable quality

each accelerates will be precisely formulated
It will be weighted in system house and small
packaged
The properties have been designed in lab, instead of
any ‘Inspiration’ on site;
Manual will be provided

Step 1:

Unpackage selected accelerator package and pour totally into drum

Step 2:

Mix for 10-15 mins ensure well

Step3：

Ready to use
6 mons shelf life
Selected properties

First Recommendation Of Slab Jacking Material

Features low foam density and high gelling reactivity;
Recommend foam density ~ 3 pound/ft3 with adding amount 5%wt;

Foam density under different Accelerator 1 adding level

Accl1 addition amount	1.0%	2.5%	5.0%	7.5%	10.0%
FBD kg/m3	191.50	79.80	48.80	43.31	38.79

Foam Density: 48.8 kg/m³
Cell Open Area: 0%
Water Absorption: 0.36%
Compression Modulus: 0.44 MPa
Test Conditions:
- Sample Size: 50mm*50mm*50mm
- Compression Speed: 15mm/min
- Compression Rate: 10%
Dimensional Stability: < 2%
- L: -0.12%
- W: 0.01%
- T: 1.16%

*Please check with SPC any other accelerators for properties adjustment.

Step 1:

Unpackage selected accelerator package and pour totally into drum

Mudjacking vs. Slabjacking

Project	Mudjacking	Slabjacking (Polyurethane)
Material	Cement mortar	Polyurethane foam
Weight	Heavy	Lightweight
Cure Time	Length	Quick
Environmental Adaptability	Variation (wet soil/water sensitive)	Good (wet or dry)
Cost	Low	High
Construction Impact	Slow construction, long ground occupation	Quick application and quick return to service

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Customer Cases Of Slab Lifting Solution

Our client is a construction company specializing in floor repair. Initially, using a traditional rigid foam system, they encountered problems such as uneven foaming and incomplete on-site curing. With support from our technical team and formula optimization, they adopted a next-generation Tough polyurethane system, significantly improving the foam’s permeability and compressive toughness, significantly enhancing construction stability.
The improved material’s excellent performance and successful construction results enabled the client to successfully win a bid for a foundation repair project from the local government, becoming a long-term partner in regional infrastructure restoration projects.