SikaTop 107 Seal
Two-Component Polymer-Modified Cementitious Waterproofing Coating for Concrete and Masonry
Authorized Project Distributor — Sika India | Space Arc Engineering, Ghaziabad
Product Overview
SikaTop 107 Seal is a two-component, polymer-modified cementitious waterproofing and protective coating from Sika consisting of a dry cementitious powder component and a liquid polymer component mixed together at application to produce a flexible, crack-bridging, waterproof coating applied by brush, roller, or spray to concrete and masonry surfaces. Two-component polymer-modified cementitious coatings are one of the most widely specified waterproofing systems in India for below-grade and water-retaining structures because they combine the compatibility of cementitious material (alkaline, vapour-permeable, tolerant of damp substrates) with the flexibility and waterproofing performance of the polymer component. SikaTop 107 Seal is applied in two to three coats at 2 to 4 mm total thickness — at this build, the coating bridges hairline cracks up to 0.2 mm in the concrete substrate, resists moderate hydrostatic pressure on both positive and negative faces, and provides a barrier against carbonation and chloride penetration. The polymer component disperses through the cementitious matrix, blocking the continuous capillary pore network that allows water passage in unreinforced cement and creating a partially elastomeric layer that accommodates minor substrate movement. SikaTop 107 Seal can be applied to the negative face of water-retaining and below-grade structures — the interior face where access to the positive water-contact face is unavailable — and can resist the outward water pressure transmitted through the concrete mass. Space Arc Engineering distributes SikaTop 107 Seal for basement, water tank, swimming pool, and concrete protection projects across Delhi NCR, Ghaziabad, Noida, and Northern India.
Applications
- Basement interior wall and floor waterproofing — negative face waterproofing system
- Water storage and overhead tank interior waterproofing — potable water compatible grade
- Swimming pool interior wall and floor waterproofing before tiling
- Retaining wall interior waterproofing in occupied basements
- Wet area waterproofing — toilet and bathroom floors and walls before tiling
- Underground car park concrete surface protection against carbonation and chloride
Key Advantages
- Two-component system — consistent polymer-to-cement ratio, reliable performance
- Applicable to damp substrates — no drying period required before application
- Negative face waterproofing — resists moderate hydrostatic head from the dry face
- Crack-bridging — bridges static hairline cracks up to 0.2 mm width
- Brush, roller, or spray application — all surface orientations including overhead
- Potable water compatible grade available for drinking water tank lining
Technical Data
| Type | Two-component polymer-modified cementitious waterproofing coating |
| Components | Part A — cementitious powder; Part B — liquid acrylic or SBR polymer |
| Application Method | Brush, roller, or spray — 2 to 3 coats to 2 to 4 mm total thickness |
| Hydrostatic Resistance | Moderate — refer Sika TDS for maximum positive and negative pressure rating |
| Crack Bridging | Static hairline cracks up to 0.2 mm width |
| Coverage | Approximately 1.5 to 2.0 kg per m2 per mm of coating thickness |
Get a Quote
+91 9999155255 | info@space-arc.com | Space Arc Engineering, Sahibabad, Ghaziabad
Frequently Asked Questions
What is the difference between SikaTop 107 Seal and standard waterproof cement paint for basement waterproofing?
SikaTop 107 Seal and standard cement paint are fundamentally different in performance. Cement paint (snowcem, colour wash) is a thin coating of 0.3 to 0.5 mm DFT providing decorative finish and very minor surface pore sealing, with essentially no resistance to hydrostatic pressure and cracking on any substrate movement. Waterproof cement plaster (10 to 20 mm thick mortar with 1 to 2 per cent waterproofing admixture) provides better surface integrity but is rigid and cracks when the substrate moves, and its water-cement ratio of 0.45 to 0.55 leaves significant capillary permeability. SikaTop 107 Seal at 2 to 4 mm build uses a two-component system where the polymer liquid replaces a large fraction of the mixing water — the polymer-to-cement ratio (30 to 40 per cent polymer by weight of dry component) produces a partially elastomeric, crack-bridging coating with genuine hydrostatic resistance. SikaTop 107 Seal provides 3 to 5 times the waterproofing performance of waterproof cement plaster at one-fifth the applied thickness, with crack-bridging flexibility and negative-face hydrostatic resistance that rigid cement plaster cannot provide.
How many coats of SikaTop 107 Seal are required for a basement application and what is the inter-coat timing?
The standard specification for SikaTop 107 Seal is two to three coats applied to a total dry film thickness of 2 to 4 mm. The first coat (1.0 to 1.5 mm DFT) is applied by stiff brush, scrubbing the material firmly into the substrate surface pores, cracks, and voids. Allow the first coat to reach a firm, lightly tacky state before applying the second coat — typically 3 to 6 hours at 25 degrees in Indian conditions. Do not allow the first coat to fully dry white and hard before the second coat application, as an over-dried first coat may delaminate from the second coat. The second coat (1.0 to 1.5 mm DFT) is applied perpendicular to the direction of the first coat and fills any pinholes or thin areas. A third coat (0.5 to 1.0 mm DFT) is required for higher hydrostatic pressure or potable water tank applications, bringing the total DFT to 2.5 to 4.0 mm. After completion, cure the applied coating for a minimum of 7 days (keeping the coating moist and protected from drying wind and direct sun) before backfilling, flooding, or applying tiles.
Is SikaTop 107 Seal suitable for waterproofing a potable drinking water storage tank internally?
Sika produces a potable water compatible grade of SikaTop 107 Seal suitable for the internal lining of drinking water storage tanks — both underground sump tanks and overhead gravity tanks. The product is formulated from polymer emulsions and Portland cement without heavy metals, solvents, or harmful organic compounds at levels above potable water quality thresholds. After full curing, the coating does not impart taste or odour to stored water and is compatible with IS 10500 drinking water quality standards. For potable water tank applications, the concrete substrate must be clean and free of all form release agents, oils, and contamination before coating; the applied coating must cure for a minimum of 7 days before the tank is filled; and the tank should be filled, left for 24 hours, and fully drained twice before being put into potable water service, to ensure complete leaching of any surface residues from the freshly cured coating. Contact Space Arc Engineering for the potable water compatibility documentation for SikaTop 107 Seal for your water tank project in Delhi NCR or Northern India.
Source SikaTop 107 Seal for Your Project
Space Arc Engineering is an Authorized Project Distributor for Sika India serving Delhi NCR, Ghaziabad, Noida and Uttar Pradesh.