Sika Waterproofing Coating
Overview
Sika waterproofing solutions are high-performance, cement-based or polyurethane-based coatings developed to provide long-lasting protection against water penetration in various construction elements. Sika’s waterproofing products are suitable for use in both residential and commercial structures and are ideal for rooftops, wet areas, basements, and water tanks.
Main Uses
- Roofs and balconies
- Bathrooms, kitchens, and wet rooms
- Retaining walls and basements
- Water tanks and reservoirs
- Swimming pools
- Foundation protection
- Concrete and masonry surfaces
Popular Sika Waterproofing Products
| Product Name | Type | Key Feature | Application Area |
|---|---|---|---|
| SikaTop® Seal-107 | Cementitious 2-component | Flexible and brush-applied coating | Bathrooms, tanks |
| Sika® RainTite Kit | Acrylic-based waterproofing | Easy to apply and UV-resistant | Roofs, balconies |
| Sikalastic®-1K | One-component polymer modified | Crack-bridging and waterproof | Foundations, terraces |
| Sika® SealTape | Elastic sealing tape | Waterproof joint sealing | Wall-floor joints |
Technical Specifications Example (SikaTop® Seal-107)
| Property | Value |
|---|---|
| Appearance | Component A (liquid): White, Component B (powder): Grey |
| Mixing Ratio | A:B = 1:4 (by weight) |
| Density | ~1.9 kg/L (mixed) |
| Application Method | Brush or roller |
| Pot Life | ~30–40 minutes |
| Waterproofing Class | Positive and negative side |
| Coverage | ~2 kg/m² per coat |
| Packaging | Typically 25 kg kits (5 kg A + 20 kg B) |
| Shelf Life | 12 months in unopened packaging |
Advantages
- Excellent adhesion to concrete and masonry
- Waterproof and weather-resistant
- Resistant to positive and negative water pressure
- Easy to mix and apply
- Can be overcoated with tiles or paints
- High flexibility (some variants)
Application Guidelines
- Surface Preparation:
- Clean the surface, repair cracks, and remove loose materials.
- Mixing:
- Mix components A and B thoroughly until homogeneous.
- Application:
- Apply first coat using a brush or roller. Allow it to dry before applying the second coat.
- Curing:
- Protect from direct sunlight and moisture until fully cured.
Safety Instructions
- Use personal protective equipment (gloves, goggles)
- Ensure good ventilation during application
- Store in dry, shaded areas away from heat and moisture
- Follow product’s SDS for safety compliance
