SIKA · AUTHORIZED PROJECT DISTRIBUTOR · SPACE ARC ENGINEERING
Sika® Sigunit® Powder K
Alkali-free powder set accelerator for dry-mix shotcrete
Product Overview
Sika® Sigunit® Powder K is a high-performance, ready-to-use set accelerator in fine white powder form, engineered for dry-mix (gunite) shotcrete. Dosed into the dry mix, it drives rapid cement hydration so the sprayed layer stiffens almost immediately and develops strong early strength within the first 24 hours, which means thicker passes, less material falling away, and reliable bonding even on damp rock faces with minor seepage. Being chloride-free, it protects embedded reinforcement and suits low-alkali cements. It is the go-to choice for tunnelling crews, rock-support specialists and repair contractors who need fast, water-tight overhead and vertical spraying. As an Authorized Project Distributor for Sika in India, Space Arc Engineering supplies Sigunit® Powder K with application guidance for tunnel, slope-stabilisation and concrete-repair projects nationwide.
Features & Benefits
- Triggers fast set and strong early strength within the first 24 hours, speeding production cycles
- Lowers rebound and material wastage during spraying, improving yield
- Bonds reliably to damp surfaces and areas of slight seepage for better water tightness
- Chloride-free formulation safeguards steel reinforcement against corrosion
- Compatible with low-alkali cements and well suited to overhead spraying
- Supplied ready-to-use in powder form for straightforward dosing into dry mixes
Technical Highlights
| Coverage | Dosed at 3% to 8% by weight of binder for single-pass layers up to 15 cm thick; confirm via job-site trials. |
| Strength | Promotes accelerated strength development within the first 24 hours; full early-strength data — refer to TDS. |
| Performance | Reduces rebound, improves adhesion on damp/seeping substrates and enhances overhead spraying performance. |
| Application Conditions | Store dry between +5°C and +40°C; classified ASTM C 1141 Type 1 Grade 9 Class B. |
| Packaging | Supplied in 12.5 kg packs; white fine powder with bulk density of 0.42 kg/l at 25°C. |
Applications
- Tunnels, galleries and underground excavation linings
- Rock-face stabilisation and slope or embankment support
- Thin-section sprayed concrete shells and domes
- Swimming pools and water-retaining structures
- Concrete repair and structural strengthening by gunite
SPACE ARC ENGINEERING · AUTHORIZED DISTRIBUTOR
Product image & sample available on request
Technical Data
| Type | Alkali-free powder accelerator for dry-mix shotcrete |
| Base | Mixture of special inorganic substances |
| Appearance | White fine powder |
| Density | 0.42 kg/l at 25°C |
| Dosage | 3% – 8% by weight of binder |
| Pack size | 12.5 kg |
Datasheet & Documents
Request the Technical Data Sheet, method statement and safety data sheet from Space Arc Engineering.
Request Quote / Availability
+91 9999155255
+91 7290089007
info@space-arc.com
Frequently Asked Questions
What is Sika Sigunit Powder K used for?
It is a powder set accelerator for dry-mix (gunite) shotcrete. It speeds setting and early strength gain so sprayed concrete can be applied in thicker passes with low rebound, including on damp surfaces, in tunnels, rock support and repair work.
Is Sika Sigunit Powder K chloride-free?
Yes. It contains no added chlorides, so it does not promote corrosion of steel reinforcement, and it is suitable for use with low-alkali cements.
What dosage of Sigunit Powder K should I use?
The typical range is 3% to 8% by weight of binder for layers up to 15 cm applied in a single pass. The exact dosage should always be fixed through site trials with your actual mix and cement.
How should Sika Sigunit Powder K be stored and what is its shelf life?
Keep it in dry, clean conditions between +5°C and +40°C in the original sealed packaging. Shelf life is 6 months from the date of production.
Who supplies Sika Sigunit Powder K in India?
Space Arc Engineering is an authorized Sika distributor in India and supplies Sigunit Powder K with technical support. Contact +91 9999155255 or info@space-arc.com for pricing and project advice.
Related Products
- Sika® Sigunit® L-54 AF — Alkali-free liquid accelerator for wet-mix shotcrete projects
- Sika® Sigunit® L-93 AF (I) — Liquid alkali-free accelerator for high early-strength sprayed concrete
- Sika® Stabilizer-4 R IN — VMA that improves cohesion and pumpability of shotcrete mixes
- Sika® ViscoCrete®-2002 HE — Superplasticiser pairing for high-early-strength sprayed concrete
Buy Sika® Sigunit® Powder K — Sika Distributor in India
Space Arc Engineering is an Authorized Project Distributor supplying Sika products for infrastructure, industrial, commercial and residential projects across India.
+91 9999155255 | +91 7290089007 | info@space-arc.com