Sika Sikalastic-701 SF
Sika Sikalastic-701 SF
Sikalastic-701 SF is a 2-part polyaspartic top coat designed for Sika liquid applied membrane roof waterproofing systems. 100% solids, solvent-free, with excellent UV resistance and weathering performance. Used as the protective top coat for Sikalastic-702 systems. Exterior applications only, professional use only.
Sikalastic-701 SF — Polyaspartic Top Coat for Roof Waterproofing
Sikalastic-701 SF is a high-performance, 2-part polyaspartic top coat that forms part of the SikaRoof PUR two-component solvent-free polyurea system. With 100% solid content, it serves as the UV-resistant top coat for Sikalastic-702 and other liquid applied membrane waterproofing systems. It offers excellent weathering resistance, colour stability, and high solar reflectance, making it ideal for cool roof applications.
Key Features
- 100% solids content, solvent-free, very low odour
- Excellent yellowing resistance for long-term colour stability
- Outstanding weathering and UV resistance
- Good gloss retention
- High solar reflectance of 0.87 and SRI of 111, ideal for cool roofs
- Resistant to ponding water
- Low surface soiling, easy to clean and maintain
- Good chemical resistance
- Fire rated Broof (T1)(T4)
Typical Applications
- Top coat for Sikalastic-702 waterproofing systems
- New liquid applied membrane roof waterproofing
- Renovation of existing membranes
- Flat and sloped roofs
- Walkways
- Terraces
Note: This product is for exterior applications only and must be applied by experienced professionals.
Why Choose Sikalastic-701 SF?
- Cool roof performance: Solar reflectance 0.87 and SRI 111 effectively reduce roof surface temperature and building energy consumption
- Environmentally friendly: 100% solids, solvent-free, very low odour
- Long-lasting protection: Excellent UV and yellowing resistance for long-term colour stability
- Fast curing: Foot traffic ready in as little as 120 minutes (at 30°C)
- Complete system: Works with Sikalastic-702 for a comprehensive roof waterproofing solution
Packaging & Consumption
| Item | Specification |
|---|---|
| Packaging | 6.55 kg set (Part A 4.46 kg + Part B 2.09 kg) |
| Mixing Ratio | A:B = 2.1:1 (by weight) |
| Colour | White, Terracotta |
| Consumption | 0.30 kg/m² (single coat application) |
| Density | 1.45 kg/L (mixed resin at +23°C) |
Technical Specifications
| Property | Value | Test Standard |
|---|---|---|
| Chemical Base | Polyaspartic resin | — |
| Solid Content | 100% (both Part A and Part B) | — |
| Tensile Strength | 15 MPa | EN ISO 527-3 |
| Elongation at Break | 140% | EN ISO 527-3 |
| Solar Reflectance | 0.87 | ASTM C1549 |
| Thermal Emittance | 0.90 | ASTM C1371 |
| Solar Reflectance Index (SRI) | 111 | ASTM E1980 |
| Fire Rating | Broof (T1)(T4) | CEN/TS 1187 |
| Pot Life | Approx. 30 minutes (+20°C) | — |
| Tack Free Time | Approx. 90 minutes (+20°C, 50% RH) | — |
| Shelf Life | Part A: 24 months / Part B: 12 months | — |
| Storage Conditions | +5°C to +30°C, cool dry conditions | — |
Curing Time Reference
| Conditions | Rain Resistant | Foot Traffic | Full Cure |
|---|---|---|---|
| +10°C / 50% RH | 75 minutes | 180 minutes | 1 day |
| +20°C / 50% RH | 60 minutes | 180 minutes | 1 day |
| +30°C / 50% RH | 45 minutes | 120 minutes | 16 hours |
Important Notes
- For exterior applications only — not suitable for interior use
- Must be applied by experienced professionals
- Application temperature range: +5°C to +40°C
- Substrate and uncured membrane must be at least +3°C above dew point
- If maximum overcoating time of the base layer is exceeded, prepare surface by mechanical grinding before applying top coat
- Remove dust and contamination using vacuum extraction before application
FAQ
Can Sikalastic-701 SF be used on its own?
No. Sikalastic-701 SF is a top coat that must be used with Sikalastic-702 or other liquid applied membrane systems. It provides UV and weathering protection for the waterproofing system — it is not a standalone waterproofing product.
Is Sikalastic-701 SF suitable as a cool roof?
Yes. With a solar reflectance of 0.87 and Solar Reflectance Index (SRI) of 111, it effectively reflects solar radiation, reducing roof surface temperature and building energy consumption, meeting cool roof standards.
How soon can you walk on Sikalastic-701 SF after application?
It depends on temperature and humidity. At +20°C / 50% RH, foot traffic is possible after approximately 180 minutes. At +30°C, it reduces to approximately 120 minutes. Full cure takes 16 hours to 1 day.
