Sika SikaCem-130 Intraplast
A chloride-free expanding powder admixture that turns ordinary site cement grout into a fluid, cohesive, non-shrink injection grout for ducts, anchors and cavities.
What is it?
A light-brown powder admixture, dosed into Portland-cement injection grout, that improves flow, stops bleed and produces a controlled wet-state expansion so the hardened grout does not shrink away from what it fills.
Where is it used?
Post-tensioned cable ducts, rock and soil anchors, base plates and bearing pads, crack injection and pre-placed aggregate work on infrastructure and building sites across Delhi NCR and Pan-India.
Why use it?
It gives a pumpable, gap-filling grout from cement you already have on site, keeps embedded steel fully protected, and removes the guesswork of bleed and settlement in critical injection work.
How is it applied?
Added at 0.4% by weight of cement, one 200 g pouch to a 50 kg bag, mixed to a fluid grout and pumped or poured within the working window while the expansion is still active.
About Sika SikaCem-130 Intraplast
SikaCem-130 Intraplast is a ready-to-mix powder admixture that upgrades an ordinary Portland-cement grout into a properly engineered injection grout. On its own, a neat cement-and-water grout tends to bleed, settle and shrink as it sets, leaving voids and channels exactly where you were trying to seal them. Blended into the mix at a small, fixed dose, this admixture disperses the cement particles for better flow, holds the water and solids together so the grout stays cohesive, and drives a gentle expansion while the grout is still plastic. The result is a fluid, stable, non-shrink grout that stays in full contact with the surfaces it fills.
For Indian engineers and applicators, its real value shows up in the demanding work: filling post-tensioned cable ducts where an air pocket around a strand is unacceptable, bedding heavy machine base plates, and injecting cracks or consolidating rock and soil anchors. Because the product is chloride-free, non-toxic and non-flammable, it is safe around prestressing steel and reinforcement, and safe for the crews handling it. It is supplied by Sika in a convenient 200 g pouch sized to one standard cement bag, so batching on site is simple and repeatable. Space Arc Engineering supplies it as an authorised Sika distributor and applicator, with technical support for Delhi NCR and Pan-India projects.
The technical insight
The admixture works on three fronts at once. First, a dispersing action separates the cement grains so they pack and flow more freely, which improves fluidity and lets you cut back the gauging water without losing pumpability. Less water means a denser, stronger grout. Second, a cohesion and slight retarding effect keeps the fine solids suspended, so the grout does not bleed water to the top or segregate during the minutes it spends being pumped down a long duct or into a deep anchor hole. Third, and most importantly, a controlled gassing reaction releases fine micro-bubbles that make the grout expand slightly while it is still soft and plastic. That plastic-state expansion offsets the natural settlement and drying shrinkage of cement, so the set grout presses against the duct wall, the base-plate underside or the crack faces instead of pulling away from them. The expansion is deliberately timed to happen before the grout stiffens, which is why the working window matters and why the dose is fixed rather than adjusted on the fly.
Where it is used
- Grouting of post-tensioned and prestressed cable ducts, filling fully around the strand
- Grouting of rock and soil anchors in tunnels, slopes and retaining works
- Bedding and grouting under bearing plates and machine base plates
- Pressure injection of cracks in concrete and masonry
- Grouting of pre-placed aggregate concrete
- Filling and consolidation of soil, rock and honeycombed concrete
- Grouting of tunnel-lining segments and annular gaps
- Bedding joints between precast concrete elements
Key advantages
- Chloride-free, so it is safe around prestressing strand and reinforcement
- Produces controlled expansion in the plastic state to give a genuinely non-shrink grout
- Improves fluidity for easier pumping and deeper penetration into ducts and cavities
- Increases cohesion and prevents bleeding and segregation of the grout
- Reduces the gauging water needed, improving density and strength
- Retards initial set to extend the working time for long or deep injection runs
- Non-toxic and non-flammable, straightforward for site crews to handle
- Fixed one-pouch-per-bag dosing makes on-site batching simple and consistent
Limitations & considerations
- It is an admixture, not a ready-mixed grout, so grout quality still depends on correct cement, water and site batching
- Expansion is time-limited, so the grout must be placed within its working window to get the full benefit
- The dose is fixed at 0.4% by cement weight and should not be increased to try to gain more expansion
- It cannot compensate for structural gaps, movement joints or the wrong grout mix design
- Shelf life is 12 months and the powder must be kept dry in sealed packaging, or it loses effectiveness
- Ambient and mix temperatures on site affect flow and expansion and should be kept within the recommended range
Selection & best practice
Use one 200 g pouch to a full 50 kg bag of fresh Portland cement, which gives the correct 0.4% dose. Add clean water to a fluid, pumpable consistency, keeping the water content as low as the pumping allows for maximum strength, and mix thoroughly, preferably with a mechanical mixer or grout pump, until uniform. Place the grout while the expansion is still active, so pump or pour it soon after mixing rather than letting it stand. For cable ducts, grout from the lowest point and vent the high points so air can escape ahead of the advancing grout. Keep the cement dry and within date, work within the recommended temperature range, and never over-dose in the hope of extra expansion. For trials and critical pours, confirm flow and set behaviour on site first, and speak to Space Arc’s technical team for method-statement support.
Specifications
| Product type | Expanding powder admixture for cementitious injection grout |
| Physical form | Light brown powder |
| Dosage | 0.4% by weight of cement (200 g per 50 kg cement bag) |
| Packaging | 200 g pouch |
| Chloride content | Chloride-free |
| Standard | Conforms to ASTM C937 |
| Shelf life | 12 months from date of production |
| Storage | Keep dry, +5°C to +35°C, in sealed original packaging |
Industry use cases
Bridges & Infrastructure
Grouting post-tensioned cable ducts on bridge decks and viaducts, where full, void-free encapsulation of the strand is critical to durability.
Tunnelling & Geotechnical
Grouting rock and soil anchors, tunnel-lining gaps and consolidating loose ground in tunnels, slopes and retaining structures.
Heavy Industry & Power
Bedding machine base plates, turbine and pump foundations under a non-shrink grout that stays in full contact for load transfer.
Building & Repair
Pressure injection of cracks and filling of honeycombed concrete in basements, water-retaining structures and general repair work.
Precast & Prefab
Grouting joints and pockets between precast elements where reliable, non-shrink filling of the connection is required.
Frequently asked questions
What is the correct dosage of SikaCem-130 Intraplast?
Is it a ready-mixed grout I can just add water to?
Is it safe to use around prestressing strand and reinforcement?
How much expansion does it give and why does it matter?
How long is the working time and how soon must I place it?
What is the shelf life and how should it be stored?
How we position Sika SikaCem-130 Intraplast
SikaCem-130 Intraplast is the go-to choice within Sika’s own grouting range when you want to convert site cement into a reliable non-shrink injection grout at low cost. Where a project instead calls for a pre-bagged, ready-to-use cementitious grout with certified strengths, look at Sika’s SikaGrout range rather than a site-batched mix. For duct grouting on major post-tensioning works, Sika also offers dedicated pre-packed cable-duct grouts worth specifying where full traceability is required. Across our other brands, Space Arc can supply equivalent grout admixtures and ready-mixed non-shrink grouts from Fosroc, Dr. Fixit and MC-Bauchemie, and our technical team can help match the right product to your duct size, anchor type or base-plate detail.
Fosroc Cebex 100 — Specify the Fosroc option when the project is standardised on Fosroc or calls for a chloride-free grout admixture certified to BS 5075, as Cebex 100 offers the same plasticising-plus-expanding action for site-batched grouts.
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Source Sika SikaCem-130 Intraplast for your project
Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.