Merks Acry Seal AB 580 UV: UV-Stable Waterproofing for Exposed Surfaces
Merks Acry Seal AB 580 UV is a UV-resistant liquid waterproofing membrane based on acrylic copolymer elastomeric resin technology. Developed specifically for exposed outdoor applications, it provides long-term waterproof protection while maintaining flexibility under changing weather conditions.
Its elastic structure adapts to substrate movement and creates a seamless waterproofing layer. Thanks to its UV-resistant formulation, the membrane can remain exposed without requiring an additional protective covering, making it an ideal solution for roofs, terraces, balconies, and other exterior surfaces.
Key Features
- UV-resistant acrylic waterproofing membrane
- Ready-to-use liquid formulation
- Suitable for exposed outdoor applications
- Excellent flexibility and crack-bridging performance
- Can be applied to horizontal and vertical surfaces
- Strong adhesion to various construction substrates
- Solvent-free and environmentally friendly
- Paintable after curing
- Water-thinnable for priming absorbent surfaces
- Creates a seamless waterproofing layer
Applications
Merks Acry Seal AB 580 UV is suitable for:
- Roofs, terraces, and balconies
- Large and detailed exterior waterproofing surfaces
- Chimney flashings and roof penetrations
- Eaves, gutters, and drainage details
- Bathrooms, showers, and wet rooms
- Horizontal and vertical concrete surfaces
- Renovation and refurbishment projects requiring exposed waterproofing systems
Advantages
UV Resistance
Unlike many conventional waterproofing membranes, Merks Acry Seal AB 580 UV can remain exposed to sunlight without requiring an additional protective coating.
Long-Term Flexibility
Maintains elasticity even in low temperatures and accommodates minor substrate movement without cracking.
Easy Application
The ready-to-use formulation can be applied by brush, roller, or spray equipment, reducing installation time and labor costs.
Strong Adhesion
Provides reliable bonding to properly prepared concrete, cementitious, and metal surfaces.
Seamless Waterproofing
Creates a continuous waterproof membrane without joints or overlaps, reducing the risk of water penetration.
Surface Preparation
Before application:
- Remove dust, dirt, grease, oil, rust, and loose particles.
- Clean heavily contaminated surfaces using water jet cleaning when required.
- Repair cracks, voids, and damaged sections using Merks Repair Plus repair mortars.
- Form suitable fillets at corner transitions.
- Apply anti-corrosion primer to steel surfaces before waterproofing.
- On highly absorbent substrates, the product may be diluted with water and used as a primer coat.
The substrate must be clean, sound, and sufficiently cured before application.
Application Procedure
First Coat
Apply the material evenly using a roller, brush, or spray equipment in a single direction.
Second Coat
Apply the second coat perpendicular to the first coat to achieve complete waterproof coverage.
Reinforcement
In areas with a high risk of cracking or movement, the use of Merks Bandix DB 888 reinforcement tape is recommended.
Consumption
| Application Thickness | Consumption |
|---|
| 1 mm Thickness | Approx. 1.5 kg/m² |
For optimum waterproofing performance, a minimum of two coats is recommended.
Technical Specifications
| Property | Value |
| Material Composition | Elastomeric resin with polymer additives |
| Appearance | White liquid |
| Density | Approx. 1.35 kg/L |
| Application Temperature | +5°C to +35°C |
| Waiting Time Between Coats | 4–5 hours at 20°C |
| Service Temperature | -20°C to +80°C |
| Commissioning Time | Minimum 3 days |
| Water Vapor Permeability | Class I |
| Adhesion Strength | ≥ 1.00 N/mm² (28 days) |
| Application Method | Brush, roller, spray |
Packaging and Storage
Merks Acry Seal AB 580 UV is supplied in:
Store unopened packaging in dry, frost-free conditions. Shelf life is 12 months when stored properly.
Important Notes
- Apply only to surfaces exposed to positive water pressure.
- Ambient and substrate temperatures must remain between +5°C and +35°C.
- The second coat should always be applied perpendicular to the first coat.
- The membrane is suitable only for light foot traffic.
- Areas exposed to impact or heavy traffic should be protected with an appropriate protective layer.
- For large surface areas, reinforcement mesh is recommended.
- Protect the product from freezing. Frozen material should not be used after thawing.
- Keep the container closed during extended pauses between applications.
- Clean all tools immediately after use with water.
Why Choose Merks Acry Seal AB 580 UV?
Merks Acry Seal AB 580 UV combines waterproofing performance, long-term flexibility, and UV resistance in a single ready-to-use system. Its ability to remain exposed without requiring additional protection makes it a practical and cost-effective solution for terraces, balconies, roofs, and other outdoor waterproofing projects.
Frequently Asked Questions (FAQ)
1. Can Merks Acry Seal AB 580 UV be used on exposed outdoor surfaces?
Yes. Its UV-resistant formulation makes it suitable for roofs, terraces, balconies, and other exposed exterior areas.
2. Does the membrane require a protective covering?
No. The product is UV resistant and can remain exposed without additional surface protection under normal conditions.
3. How long should I wait between coats?
At an ambient temperature of 20°C, allow approximately 4–5 hours between coats.
4. When can the waterproofed area be put into service?
The surface can generally be put into service after a minimum curing period of 3 days.
5. Can the product be applied by spray equipment?
Yes. Merks Acry Seal AB 580 UV can be applied using a brush, roller, or spray equipment depending on project requirements.
6. Is it suitable for balconies and terraces?
Yes. It is specifically designed for exposed roofs, terraces, balconies, gutters, and other outdoor waterproofing details.