ARDEX E 100 Screeding Mortar & Bonding/Slurry Additive
Acrylic-Based Additive for Enhanced Screed and Mortar Performance
ARDEX E 100 is a high-quality acrylic dispersion additive designed to improve the performance of cement-based screeds, mortars, and renders. When incorporated into mixes, it enhances elasticity, tensile and compressive strength, and overall workability without increasing the water content. ARDEX E 100 also acts as a bonding and slurry additive for use with ARDEX A 38 Rapid Hardening and Drying Screed Cement, ensuring superior adhesion between screeds and substrates.
Key Features
- Improves elasticity and compressive and tensile strength of mortars and screeds.
- Enhances workability and plastic properties without extra water.
- Allows bonded screeds to be applied at thicknesses as low as 15mm.
- Reduces early-age cracking and surface dusting while increasing abrasion resistance.
- Ideal as a bonding/slurry grout additive with ARDEX A 38 Screeding Cement.
- Suitable for internal and external use.
Product Description
ARDEX E 100 is an acrylic-based liquid polymer designed for use in cementitious screeding and rendering applications. It increases the bond strength, flexibility, and durability of cement/sand mortars, making it ideal for bonded screeds, patch repairs, and high-performance renders. By reducing the water/cement ratio, it minimises the risk of shrinkage and cracking while improving workability and finish quality.
When used as a bonding or slurry coat, ARDEX E 100 ensures superior adhesion between new screeds and existing concrete surfaces. The addition of this polymer creates a strong mechanical and chemical bond that enhances the long-term integrity of the screed system.
Applications
- As a bonding/slurry grout additive with ARDEX A 38 Screed Cement.
- For bonded sand/cement screeds applied at reduced thickness (minimum 15mm).
- To improve adhesion, flexibility, and crack resistance in renders and screeds.
- For use in repair mortars, smoothing coats, and floor topping mixes.
- Suitable for both internal and external substrates.
Preparation
All substrates must be structurally sound, dry, and free from dust, laitance, grease, curing compounds, or other contaminants that may impair adhesion. Mechanically prepare surfaces where necessary in accordance with BS 8204-1 to ensure a clean, open texture for maximum bonding.
Mixing
For screeding and rendering mortars, mix the cement and sand first, then add the required amount of ARDEX E 100 together with the necessary clean water until the desired consistency is achieved.
When used as a bonding slurry or grout, dilute ARDEX E 100 with an equal volume of water and gradually add cement or a cement/sand blend while stirring. Mix until a lump-free, creamy, brushable consistency is obtained.
Application
- Apply the bonding slurry to the prepared substrate using a stiff broom or brush, ensuring full and even coverage.
- Apply the screed or render mortar while the slurry is still fresh and tacky to ensure optimal bonding.
- On vertical or dense concrete surfaces, key the first coat and allow it to set to form a bonding key before applying subsequent layers.
- ARDEX E 100 modified mortars can be applied in the same manner as conventional mortars but offer significantly improved strength and adhesion.
Technical Details
| Product Type | Acrylic-Based Polymer Dispersion |
| Function | Screed and Mortar Additive / Bonding Slurry Component |
| Adhesion Strength | > 2.5 N/mm² after 28 days (on clean, laitance-free concrete) |
| Minimum Screed Thickness | 15mm (with ARDEX E 100 modification) |
| Compatibility | Portland cement, cement/lime, and masonry cements |
| Colour | White Liquid Dispersion |
| Packaging | 5kg polyethylene containers |
| Storage Conditions | Store frost-free and away from direct sunlight |
| Shelf Life | Minimum 12 months (in unopened container) |
Benefits
- Significantly enhances screed performance and durability.
- Reduces cracking and surface dusting during curing.
- Improves adhesion to concrete and cementitious backgrounds.
- Allows thinner bonded screed applications (down to 15mm).
- Suitable for both internal floors and external screeding applications.
FAQs
What is ARDEX E 100 used for?
ARDEX E 100 is used as a performance-enhancing additive in cement-based screeds and mortars to improve strength, flexibility, and adhesion. It is also used as a bonding/slurry additive for ARDEX A 38 Screed Cement.
Can ARDEX E 100 reduce screed thickness?
Yes. When used in a bonded screed mix, ARDEX E 100 enables screed applications at reduced thicknesses of as little as 15mm, compared to the typical 25mm minimum for unmodified screeds.
Is ARDEX E 100 suitable for external applications?
Yes, ARDEX E 100 is designed for both internal and external use, providing durable and flexible performance under varying environmental conditions.
How does ARDEX E 100 improve mortar performance?
It enhances the mortar’s workability and plasticity, increases compressive and tensile strength, reduces early shrinkage cracking, and improves surface finish and abrasion resistance.
Can ARDEX E 100 be mixed directly with water?
Yes, for bonding slurry or grout applications, ARDEX E 100 should be diluted with an equal volume of clean water before mixing with cement or sand/cement blends.
What is the adhesion strength of ARDEX E 100 modified slurry?
When applied correctly onto a clean, laitance-free concrete surface, cement slurries improved with ARDEX E 100 achieve an adhesion strength exceeding 2.5 N/mm² after 28 days.
How should ARDEX E 100 be stored?
Store in unopened containers, protected from frost and direct sunlight. Under these conditions, the product has a shelf life of at least 12 months.
