Sika MonoTop® 108 Water Plug IN is a fast-setting, cement-based waterproofing and water-plugging mortar designed to stop active water leaks and seepage. It is suitable for sealing cracks, joints and openings in concrete and masonry structures, providing a durable and reliable waterproof seal.
Product Name: Sika MonoTop®-108 Water Plug IN
Product Type: Rapid-Setting Waterproof Cement Mortar
Chemical Base: Cement and Special Additives
Appearance: Lump-free Grey Powder
Application: Instant Water Leakage Sealing & Waterproofing
Brand: Sika
Sika MonoTop®-108 Water Plug IN is a ready-to-use, rapid-setting, waterproof cement mortar specially developed for instantly stopping water leakage through concrete and masonry structures. It is designed to provide fast and reliable sealing against water infiltration, including leakage occurring under negative water pressure.
The product is particularly suitable for sealing cracks, gravel pockets, casting joints, drainage outlets, water tanks, basements, sunken pits, and other concrete or masonry structures where rapid water-stopping performance is required.
Sika MonoTop®-108 Water Plug IN requires only the addition of clean water before application. Its rapid-setting characteristics allow the mortar to harden within approximately 2–3 minutes at +27 °C, helping prevent the material from being washed out even when applied in the presence of running water.
Sika MonoTop®-108 Water Plug IN is a cement-based waterproof plugging mortar formulated with cement and special additives. The formulation is designed to develop rapid setting and early strength after mixing with water.
Cement and Special Additives
Lump-free Grey Powder
When mixed with the recommended quantity of water, the dry powder forms a workable mortar that can be quickly moulded and pressed into prepared leakage points. The rapid-setting characteristics allow the material to form an effective plug before significant washout can occur.
Sika MonoTop®-108 Water Plug IN offers several important properties for construction and waterproofing applications:
These characteristics make Sika MonoTop®-108 Water Plug IN a practical solution for emergency and rapid water-leakage sealing in concrete and masonry structures.
Sika MonoTop®-108 Water Plug IN works primarily through rapid cementitious setting and hardening.
After mixing the powder with the recommended quantity of clean water, the mortar is quickly moulded into a plug and pressed firmly into the prepared leakage point. The mortar rapidly develops its initial set, allowing it to remain in position and resist washout from running water.
At approximately +27 °C, the product has an initial setting time of around 150 seconds and a final setting time of around 200 seconds, although actual setting time can vary depending on product, water, substrate and ambient temperatures as well as the amount of water used.
Sika MonoTop®-108 Water Plug IN is designed for instantly sealing water leakage through concrete structures. It can be used around cracks, casting joints and localised leakage points.
The product can be used to seal water infiltration through masonry walls and other mineral-based substrates.
It is suitable for sealing leakage points encountered during waterproofing work in water tanks and similar structures.
Basements, sunken pits and below-ground structures can experience water infiltration due to groundwater pressure. Sika MonoTop®-108 Water Plug IN can be used for rapid sealing of localised leakage points.
The product can be used for instant sealing of water drainage outlets during waterproofing treatments.
It can be used to seal negative-pressure water leaks through cracks, gravel pockets and casting joints.
Sika MonoTop®-108 Water Plug IN can also be used as a plugging mortar for fixing nozzles and grouting ports during injection-grouting works.
Sika MonoTop®-108 Water Plug IN provides several advantages for professional waterproofing and repair applications:
| Property | Typical Value |
|---|---|
| Product Type | Rapid-setting waterproof cement mortar |
| Chemical Base | Cement and special additives |
| Appearance | Lump-free grey powder |
| Packaging | 1 kg pouch / 5 kg bag |
| Shelf Life | 12 months |
| Fresh Mortar Density | ~2.1 kg/L |
| Initial Setting Time | ~150 seconds at +27 °C |
| Final Setting Time | ~200 seconds at +27 °C |
| Compressive Strength – 6 hours | ~8 N/mm² |
| Compressive Strength – 24 hours | ~10 N/mm² |
| Water Requirement – 1 kg | 0.26–0.28 L |
| Water Requirement – 5 kg | 1.30–1.40 L |
| Ambient Temperature | +10 °C to +40 °C |
| Substrate Temperature | +10 °C to +40 °C |
The above values are typical technical values published by Sika India and may vary depending on site conditions, temperature, water-to-powder ratio and application conditions.
Sika MonoTop®-108 Water Plug IN is designed for rapid application. Because of its fast setting characteristics, only a small quantity should normally be mixed at a time.
Sika recommends preparing the leakage area by mechanically cleaning it and removing loose particles, laitance, oil, grease and other contaminants. For leakage points, the area can be widened and deepened in a dove-tail configuration to approximately 20 mm to provide sufficient space for the plugging mortar and improve bonding.
The recommended water requirement according to Sika India is:
For 1 kg pouch: Approximately 0.26–0.28 litre of water
For 5 kg bag: Approximately 1.30–1.40 litres of water
The exact quantity may be adjusted according to site conditions and the consistency required. Excess water should be avoided because the setting characteristics and performance can be affected by the water-to-powder ratio.
Sika MonoTop®-108 Water Plug IN develops strength rapidly after application.
Typical compressive strength values are:
These values are measured according to ASTM C109 under the conditions specified in the Product Data Sheet.
Sika MonoTop®-108 Water Plug IN can be used on a variety of construction substrates, including:
Its good adhesion characteristics make it suitable for sealing leakage points involving different construction materials.
Sika MonoTop®-108 Water Plug IN is supplied in:
The product should remain in its original, unopened and undamaged packaging until use.
For maintaining product quality, Sika MonoTop®-108 Water Plug IN should be stored:
The stated shelf life is 12 months from the date of production, provided the product is stored under the recommended conditions.
Although Sika MonoTop®-108 Water Plug IN is designed for construction applications and is described as non-toxic and chloride-free, normal precautions for handling cement-based powders should be followed.
Because the mortar sets rapidly, operators should prepare only the quantity that can be applied immediately.
All tools and application equipment should be cleaned with water immediately after use.
Once the material has hardened, it can generally only be removed mechanically.
Sika MonoTop®-108 Water Plug IN is a rapid-setting plugging mortar, not a general-purpose waterproofing coating. It is primarily intended for sealing localised water leakage points.
When water pressure is excessive, Sika recommends reducing the water pressure where appropriate and addressing the main leakage point before sealing secondary openings. Multiple applications may be required where leakage pressure is high.
Sika MonoTop®-108 Water Plug IN can be particularly useful in:
Sika MonoTop®-108 Water Plug IN combines rapid setting, early strength development, adhesion and water-stopping capability in a ready-to-use cementitious mortar.
Its ability to harden rapidly in the presence of running water makes it particularly valuable for situations where conventional cement mortar may be washed away before it can set. The product can therefore provide a fast solution for localised water leakage in concrete and masonry structures.
Its ready-to-use formulation also simplifies site application because the installer only needs to add the recommended amount of clean water before forming and pressing the mortar into the leakage point.
Sika MonoTop®-108 Water Plug IN is a professional rapid-setting waterproof cement mortar designed for instantly stopping water leakage in concrete and masonry structures. Its rapid setting characteristics, early strength development, excellent adhesion and resistance to washout make it a practical solution for emergency water-leakage sealing and waterproofing-related construction work.
It is suitable for cracks, gravel pockets, casting joints, drainage outlets, water tanks, basements, sunken pits, concrete and masonry structures, as well as for fixing nozzles or grouting ports during injection-grouting applications.
With its simple add-water-and-apply formulation and rapid hardening performance, Sika MonoTop®-108 Water Plug IN provides an efficient solution for professional contractors, waterproofing specialists and construction professionals who require fast and reliable water-stopping performance.
