A two-component polymer is a material formed from two separate liquids, an A-side (isocyanate) and a B-side (polyol blend), that react when mixed; in concrete raising they combine at the injection point to form rigid polyurethane foam.
In depth
The two sides are stored in separate heated tanks and pumped through separate heated hoses to keep them at the right temperature and flow. They meet only at the nozzle or injection port, so the reaction happens precisely under the slab rather than inside the equipment. Correct mixing ratio is essential; it determines whether the foam cures strong and consistent.
This point-of-injection mixing is what gives polyurethane its quality control: every shot is blended fresh in the correct proportion, unlike mudjacking slurry whose composition varies batch to batch.
How Acme applies it. Acme’s injectors have pressure gauges mounted at the point of injection so technicians can verify the A- and B-sides are mixing in the correct ratio and producing strong, properly cured foam every time.
Related terms: Polyurethane Foam, Injection Port, Foamjection, Expansion Ratio
Frequently asked questions
What are the A-side and B-side?
The A-side is an isocyanate and the B-side is a polyol blend. Mixed in the right ratio they react within seconds into expanding, rigid polyurethane foam.
Where do the two components mix?
Only at the nozzle or injection port beneath the slab, which ensures the foam forms exactly where support and lift are needed.