⚡ Stops Active Water Leaks in 2–4 Minutes

SikaTop®-590 Seal – Fast Setting Water Plug Mortar | Ongata Rongai & Tuala, Kenya

Dealing with water gushing or seeping through a wall, floor, tank, or basement — even under pressure? SikaTop®-590 Seal (Sika 590 Seal), available at Shabbiri Hardware, Magadi Road, Ongata Rongai and Tuala (past Nazarene University), is the emergency solution trusted by contractors, plumbers, and fundis across Kenya. Mixed with clean water only, it forms an ultra rapid setting plugging mortar that sets in just 2–4 minutes and expands as it cures — locking into cracks, holes, and joints to form a permanent watertight seal, even where flowing water would wash ordinary cement away. Formerly sold as MSeal 590. Chloride-free, rebar-safe, and cures with strength similar to concrete itself.

📋 Technical Specifications

Property	Specification
Product Type	Ultra rapid setting cementitious water-plugging mortar
Composition	Special cement, fillers and additives
Appearance	Grey powder
Maximum Grain Size	~0.8 mm
Packaging	5 kg and 25 kg metal pails
Mixing Ratio	0.22–0.26 litres of water per kg of powder (~0.24 L/kg)
Pot Life	1–2 minutes at ~21°C
Setting Time	2–4 minutes at ~21°C
Compressive Strength	≥12 MPa @ 30 min; ≥20 MPa @ 24 hrs; ≥50 MPa @ 28 days (EN 1015-11)
Flexural Strength	≥2.5 MPa @ 30 min; ≥4.5 MPa @ 24 hrs; ≥7.0 MPa @ 28 days (EN 1015-11)
Tensile Adhesion Strength	2.1 MPa @ 24 hours (EN 1015-12)
Fresh Mortar Density	~2.1 kg/L
Reaction to Fire	Class A1 (EN 13501-1)
Yield	1 kg powder ≈ 0.6 L of mortar ≈ 1.4 m of a 20mm × 20mm joint
Application Temperature	Material +5°C to +30°C; ambient & substrate +5°C to +35°C
Shelf Life	12 months from production in unopened pails
Storage	Under cover, off the ground, protected from moisture, below 30°C

★ Key Advantages

⚡ Ultra-Rapid SetPlugs active leaks instantly — final set in 2–4 minutes.

💧 Just Add WaterOne-component grey powder. No special additives needed.

🔒 Expands As It SetsCompresses against the substrate for a permanent watertight seal.

🌊 Beats Flowing WaterWorks where normal mortar washes away and resins won't bond.

🧱 Concrete-CompatibleSimilar characteristics to concrete once cured.

🛡️ Chloride-FreeSafe for reinforced concrete — no rebar corrosion.

💪 High Early StrengthOver 12 MPa compressive strength in just 30 minutes.

🔥 Fire Class A1Non-combustible (EN 13501-1).

🛠 Where to Use SikaTop®-590 Seal

Stopping active water leaks or seepage under pressure through joints, cracks & holes in concrete or masonry
Basement leak repair — sealing construction joints and floor/wall junctions before basement tanking
Water tanks, reservoirs & water-retaining structures — sealing cracks and construction joints
Instant sewer connections and joint filling in tunnels, sewage systems, pipes and mines
Rapid anchoring of bolts, railings, conduits, pipes, gates & sanitary equipment — set in minutes
Filling holes, blisters, honeycombing and construction faults in concrete walls

⚠️ Not for: dynamic (moving) cracks, expansion/control joints, or use as a surface-applied coating. For surface waterproofing, ask us about SikaTop Seal-107 or Sikalastic roof coatings.

📖 How to Use SikaTop®-590 Seal (Application Guide)

Prepare the Crack or Hole

Cut the crack or hole to a minimum of 20mm × 20mm width and depth, sides as square as possible — undercut where you can, never leave a V-shape or feather edge. For anchoring bolts, drill deep enough with at least 10 mm clearance all round. Flush out dust and loose particles with clean water, and dampen all surfaces immediately before applying.

Mix (Small Batches Only!)

Mix the powder by hand with clean water at approximately 0.24 litres per kg to a stiff consistency. Mix quickly — pot life is only 1–2 minutes, so mix only what you can place in one go. Never re-temper (re-wet) material that has started to harden.

Plug the Leak

Hold the mixed mortar in a gloved hand until you feel slight warmth or initial setting begin. Press it firmly into the opening with full pressure and hold — without moving — for at least 1 minute. For large openings, work progressively from the sides toward the middle with successive mixes. Once the water is stopped, trim the patch flush with the wall.

Floor/Wall Junction Sealing (Coving)

For sealing the joint between floor and wall, force the mortar into the prepared groove and shape a 45° cove/fillet of approximately 35–45 mm at the junction using a round-nosed tool.

Anchoring Bolts & Posts

Fill the hole completely with mortar, tamp it down, then immediately centre the bolt or post and force it into the mortar. Tamp firmly around it — the anchor is set within minutes.

Cure

Final set occurs in 2–4 minutes. Once stiffened, dampen the repair with clean water and keep it damp for at least 15 minutes. Clean tools with water immediately — hardened material can only be removed mechanically.

❓ Frequently Asked Questions

What is Sika 590 Seal used for?

SikaTop-590 Seal is an ultra rapid setting mortar used to instantly stop active water leaks through cracks, holes, and joints in concrete and masonry — including basements, water tanks, reservoirs, and sewers. It is also used for rapid anchoring of bolts, railings, and pipes.

How fast does Sika 590 Seal set?

It sets in just 2–4 minutes, with a working (pot) life of only 1–2 minutes. It reaches over 12 MPa compressive strength within 30 minutes.

Can Sika 590 Seal stop water that is actively leaking?

Yes — that is its main purpose. It expands as it sets, forming a permanent watertight seal even against flowing water under pressure, where normal mortar would wash away.

How do you mix Sika 590 Seal?

Mix the grey powder by hand with clean water only, at roughly 0.24 litres of water per kg of powder, to a stiff consistency. Mix only small amounts you can place within 1–2 minutes.

What sizes does Sika 590 Seal come in?

It is available in 5 kg and 25 kg metal pails at both Shabbiri Hardware branches — Magadi Road Ongata Rongai and Tuala past Nazarene University. Call 0741 042484 or 0745 554008 for current prices.

Is Sika 590 Seal the same as MSeal 590?

Yes — SikaTop-590 Seal is the new name for the product formerly sold as MSeal 590, following Sika's acquisition of the MBCC/Master Builders range.

Why Buy SikaTop®-590 Seal from Shabbiri Hardware?

Shabbiri Hardware Kenya Limited has been supplying builders, plumbers, contractors, and homeowners since 1990. We stock genuine Sika construction chemicals alongside cement, steel, waterproofing products, roofing, flooring, and the full range of building materials — with honest advice on choosing the right product for your leak, tank, basement, or anchoring job.

📍 Branch 1 — Ongata RongaiMagadi Road, Ongata Rongai

📍 Branch 2 — TualaMagadi Road, Tuala — past Nazarene University

📞 Call / WhatsApp: 0741 042484 | 0745 554008

📧 Email: info@shabbirihardware.co.ke

🌐 Website: www.shabbirihardware.co.ke

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Serving Ongata Rongai, Tuala, Kiserian, Karen, Langata, Ngong, Kajiado, and the greater Nairobi area. Countrywide delivery available.