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ReadInjection Grouts & Crystalline Waterproofing
RAPIDSTRONG GROUT PU is an expansive, water-reactive, water-barrier polyurethane injection grout for free-flow pressure grouting. When it contacts water — including seawater and water containing slight acids or alkalies — it reacts quickly, expands into surrounding pores, cracks and narrow gaps, and polymerises within 36–48 seconds into a tough, highly adhesive solid. Non-toxic, non-pollutant, with no effect on potable water or marine life. Suitable for soil and abutment stabilisation, underground basements, retaining walls, rock areas, earth filling segments and structures exposed to waste water, industrial, chemical and sewage environments.
Figures are controlled laboratory results. Actual site performance varies with substrate, temperature, humidity, application method and workmanship — please confirm the current product datasheet before specification.
RAPIDSTRONG GROUT PU is a PU injection grout that reacts with water. It is a single component, light yellow liquid that is pumped through packers or nipples fixed into drilled holes. On contact with water, including seawater, it expands into pores, cracks and narrow gaps and sets into a tough, highly adhesive solid, which makes it a water reactive grout for live leaks.
Injected into loose ground, where it expands and solidifies.
Injected from inside the basement to block water coming through cracks.
Seals leaking cracks and narrow gaps by pressure injection.
Pumped into the fill, where it reacts with water and expands.
Low viscosity lets it travel into narrow gaps in rock.
Stated to have no effect on marine life.
Reacts quickly in seawater and sets into a tough solid.
Reacts in water containing slight acids or alkalies.
Seals high-pressure leaks without first blocking the hydraulic pressure.
Injected by pump to fill voids and treat loose ground.
For basement water leakage, the gel time is 0.6–0.8 minutes (36–48 seconds), so the result shows at the injection point immediately. Viscosity is 210 cps at 25°C, low enough for this PU grouting chemical to enter cracks under active flow. It is non-toxic, non-flammable and has no effect on potable water. Packs are 1 kg, 5 kg and 25 kg, with a shelf life of 1 year. If the zone is dry, inject water as well to start the reaction.
Armstrong Chemicals supplies RAPIDSTRONG GROUT PU to sites across Telangana, Andhra Pradesh, Karnataka, Kerala and Tamil Nadu, including Hyderabad, Vijayawada, Bengaluru, Kochi and Chennai.
An expansive polyurethane injection grout that gels in 36–48 seconds on water contact — including seawater and chemically varied groundwater — with no effect on potable water or marine life. For soil stabilisation, underground basements, retaining walls and coastal structures.
Get a QuoteIn coastal, marine and chemically contaminated environments, conventional grouts face a double challenge: active water ingress flushes the grout out, and the chemical composition of the water (salinity, acidity, alkalinity) can compromise cure.
A water-reactive grout that uses water — including seawater and mildly acidic or alkaline water — as its activator, gelling in 36–48 seconds regardless of water chemistry. Non-toxic, with no effect on potable water or marine life.
High-pressure leakages can be sealed without blocking the hydraulic pressure first. Low viscosity at 210 cps allows penetration into the smallest cracks, fissures and pores under active flow — and gel time of 36–48 seconds ensures the grout sets before the water can displace it.
Beyond crack injection, RAPIDSTRONG GROUT PU is specifically listed for soil stabilisation and abutment treatment — injected to consolidate water-bearing ground under foundations, embankments and road structures where loose soil and groundwater are the risk.
Pressure injection methodology for active leak stoppage, ground consolidation and soil stabilisation
Identify the crack, void, leaking zone or loose ground area requiring treatment
Drill injection holes at appropriate spacing and depth — angle towards the centre of the crack, void or treatment zone
Fit packers or nipples into the drilled holes
Fill the injection pump with RAPIDSTRONG GROUT PU
⚠️ If insufficient natural water is present at the injection zone, also inject water to initiate the polyurethane reaction
Begin injection using a low-pressure hand-operated pump; use high-pressure pump with special packers for specific conditions requiring higher pressure
High-pressure leakages can be sealed without first blocking the hydraulic pressure — the low viscosity allows penetration under active flow
⚠️ Gel time is 0.6–0.8 minutes (36–48 seconds) — results are immediately visible; monitor the injection point closely
Once the void, crack or ground zone is sealed, cease injection and remove packers
Seal injection holes after treatment
Expansive, water-reactive — for active leaks, chemically varied groundwater and marine environments.
Explicitly non-toxic and non-pollutant — no effect on potable water or marine life. Solidifies in seawater and water with slight acids or alkalies — a grout safe for every water environment.
Gels in 0.6–0.8 minutes under active hydraulic pressure — high-pressure leakages can be sealed without first blocking the water. Low viscosity (210 cps) penetrates the smallest fissures and pores.
Specifically listed for soil stabilisation and abutment treatment — injected to consolidate water-bearing ground under foundations, embankments and road structures.
High-strength flexible solid unaffected by chemicals, physical forces and bacterium — suitable for sewage, industrial waste and chemical waste structures.
Available in 1 kg, 5 kg and 25 kg packs — the widest packing range of any Armstrong injection grout. Shelf life of 1 year from manufacture. Store in dry conditions out of direct sunlight.
⚠️ Polyurethane reaction only initiates on contact with water. If insufficient natural water is present, inject water to initiate the reaction. Gel time is 0.6–0.8 minutes (36–48 seconds) — monitor the injection point closely; results are immediate.
Non-toxic and non-pollutant — no effect on potable water or marine life. Solidifies in seawater and water containing slight acids or alkalies — approved for marine infrastructure, coastal structures and environments with chemically varied water sources.
Full specifications, application systems, layering guides, and coverage tables.
Request a quote and your nearest Armstrong distributor will contact you directly.
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