About Sika SikaGrout-214 TR

SikaGrout-214 TR is Sika’s answer to a specific field problem: what to seat hot machinery on when a standard precision grout would degrade. It is a single-component, factory-blended dry powder built from cement, selected fillers and graded aggregates with special additives, needing only clean water on site. Poured into the gap beneath a base plate or foundation, it flows to fill every void, then expands by controlled gas generation while still plastic, so it compensates for shrinkage and settlement and cures in full contact with both the concrete and the steel it supports. What sets the TR grade apart is its ability to keep functioning at service temperatures around 500C, where conventional cementitious grouts lose bond and strength.

For Indian engineers and contractors, that heat rating is the whole point. Steel plants, foundries, cement kilns and process industries run equipment that soaks its foundations in continuous heat and repeated thermal cycles, and the grout under a furnace door or a blast-furnace component has to survive conditions that would spall an ordinary mix. SikaGrout-214 TR pairs that heat tolerance with the mechanical performance you expect from an engineering grout: rapid early strength, high final strength and resistance to impact and vibration. Space Arc Engineering supplies it Pan-India from Delhi NCR, and because we also apply these systems, we can advise on the substrate prep and pour sequencing that decide whether a hot-zone grout actually performs.

The technical insight

The engineering challenge in any hot-zone grout is dimensional stability. Cementitious materials shrink as they cure and expand and contract with temperature, and either movement can break the intimate contact between a base plate and its foundation, leaving voids that concentrate load and let equipment rock. SikaGrout-214 TR tackles the first half of that problem with a gas-generating expansion system that produces controlled growth while the grout is still in its plastic state, so it pushes up into the underside of the plate and compensates for plastic shrinkage and settlement before it hardens. The result is a grout that cures seated tight against both surfaces rather than pulling away. Its cement-filler-aggregate matrix and additive package are then formulated to hold that bond and a usable share of its mechanical strength through the heat and thermal gradients found around furnaces, which is exactly where an ordinary grout would craze and debond. Sika is honest that heat exacts a price: expect roughly a 25-30% reduction in mechanical properties once the grout is exposed to high service temperatures, so designers should size the installation against the reduced hot-state values, not the ambient laboratory figures.

It helps to know why heat is so hard on a grout in the first place. Cement paste loses bound water and begins to micro-crack once it is driven above roughly 300C, and any residual drying shrinkage opens a gap at the very interface that is meant to transfer load. The gas-generating system answers the second half of that by creating a slight positive pressure against the formwork and substrate while the mix is still plastic, so hardening locks in void-free contact instead of the shrinkage gap a plain grout leaves behind, while the heat-stable filler and aggregate package keeps the matrix coherent through repeated thermal excursions. Because the expansion is time-limited to that plastic phase, the practical discipline on site is speed: place inside the pot life so the expansion works for you rather than being lost to a stiffening mix.

Where it is used

• Grouting components and base plates in and around blast furnaces
• Chimney base and stack grouting exposed to sustained heat
• Flooring and bedding around furnaces and hot process equipment
• Foundations for kilns, furnaces and hot-service machinery in steel and cement plants
• Seating equipment in thermal-cycling zones where standard grouts spall
• Anchoring and bedding of heavy machinery near heat sources
• High-precision grouting of gaps from 20 mm to 100 mm under hot equipment
• Filling voids beneath base plates where continuous grout contact must survive heat
• Anchor-bolt and holding-down bolt grouting in high-temperature plant areas
• Filling gaps and pockets in refractory-adjacent structural elements

Key advantages

• Effective in service around 500C, well beyond ordinary cementitious grouts
• Non-shrink with controlled expansion by gas generation for full contact grouting
• Rapid strength development, reaching 25 N/mm2 at 1 day and 65 N/mm2 at 28 days
• Adjustable consistency between flowable and pourable to suit the gap and pour
• Very good flow characteristics allow self-levelling placement without vibration
• Single-component, ready-to-mix powder needing only clean water on site
• Resistant to impact and vibration, suiting dynamic and rotating equipment
• Non-corrosive to embedded steel, and non-flammable and non-toxic in use
• Backed by Space Arc as authorised distributor and applicator, delivered Pan-India

Limitations & considerations

• Mechanical properties drop roughly 25-30% once exposed to high service temperatures, so design to the reduced hot-state values
• Not intended for patch repair work; use a dedicated repair mortar for that
• Layer thickness is limited to 20 mm minimum and 100 mm maximum per pour without added aggregate
• Pot life is only about 20 minutes at 30C, so mix only what can be placed quickly
• Needs a saturated-surface-dry substrate and secure watertight formwork, or expansion and bond suffer
• Adding extra water beyond the stated ratio must be avoided as it weakens the cured grout
• Shelf life is only six months from production, so rotate stock and keep bags dry and sealed
• Free-flow pouring grout only: it is not a thixotropic, no-slump product for overhead or confined-space work

Selection & best practice

Specifications

Industry use cases

How we position Sika SikaGrout-214 TR

SikaGrout-214 TR sits at the specialist, high-temperature end of the grouting range. Within the Sika family, step down to a general-purpose precision grout like the standard SikaGrout-214 series for ambient machine bases and anchor bolts where no heat exposure is expected, and reach for a Sika MonoTop repair mortar when the job is concrete patching rather than seating equipment. Where a specifier prefers the Fosroc ecosystem, the direct equivalents are Conbextra HR for the same 500C refractory-grade duty and Conbextra HT for hot-works baseplates around 400C, while Conbextra GP or GP2 covers ordinary ambient precision grouting. Comparable non-shrink precision grouts in the other lines we carry include MC-Bauchemie Emcekrete and Master Builders Solutions MasterFlow, though none of those everyday grades carry this heat rating, so for genuinely hot-service grouting the TR remains the specific answer. Note too that this is a free-flow pouring grout: for overhead or confined-space work that needs a thixotropic, no-slump grout, a thixotropic grade is the right call instead. Space Arc also supplies MC-Bauchemie, Dr. Fixit, STP and Master Builders Solutions systems, so we can match the grout to the actual service temperature, gap geometry and load rather than defaulting to whatever is on the shelf.

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