Product Details

ARDEX A 440 (ARDEX A45 FEIN)

Fast, High Strength Thin Filling & Smoothing Mortar

High strength
Surface smoothing and top coating from zero thickness
Ideal for repairing, filling, and smoothing concrete subfloors
Fast drying and curing
Easy and comfortable to work with

ARDEX A 440: High-Strength, Fast-Drying Fill and Leveling Mortar

ARDEX A 440 is a versatile, high-strength mortar for filling, repairing, and leveling surfaces. Ideal for indoor use on floors and walls, it offers quick drying and curing times. Ready for further work in just 60 minutes, it can be used for fine smoothing tasks, stair repairs, and correcting surface heights. Suitable for use with wheelchairs and underfloor heating systems, ARDEX A 440 ensures durable and efficient repairs.

(Formerly known as ARDEX A 45 FEIN)

Description

Cement-based repair and filling mortar containing synthetic dispersion additives and specially selected fillers.

Use

Indoors; on floors and walls.

Used for high-strength filling, repair and finishing applications, particularly in the following situations:

On concrete, cement screeds, walls, aerated concrete, plaster, old tile or ceramic coverings, etc.
For repairing and levelling stair treads and landings
For filling, correcting or repairing voids and holes in concrete, screeds, walls and plasters
For repairs around installation pipes, door and window frames
On the underside of self-levelling screeds
For correcting height differences
For thin-layer finishing and smoothing applications

Considerations

Do not apply ARDEX A 440 in exterios or permanently wet interiors. For this purpose ARDEX recommends the use of ARDEX A 46. Make trials in case of doubt, and consult to ARDEX Technical Department if required.

Packaging

25 kg kraft bag

Shelf Life and Storage

Can be stored for approximately 12 months in its original unopened packaging in dry and cool conditions.

Mixing Ratio

Approximately 8.0 liters of water for 25 kg of powder

Dry Powder Density

Approximately 1.3 kg/l

Wet Mortar Density

Approximately 1.9 kg/l

Material Requirement

Approximately 1.25 kg powder/m²-mm

Working Time*

Approximately 15 minutes

Walkable Time*

Approximately 60 minutes

Time Before Further Work

Approximately 60 minutes

Recoating Time*

60 minutes for 0-10 mm thickness
90 minutes for 10-20 mm thickness
180 minutes for 20-50 mm thickness

**Values calculated in laboratory conditions at +20°C temperature and 65% relative humidity. Environmental and weather conditions may alter these values. Higher temperatures and lower relative humidity shorten these times, while lower temperatures and higher relative humidity extend them.

Compressive Strength

Approximately 25 N/mm² after 28 days

Flexural Strength

Approximately 5.0 N/mm² after 28 days

Suitable for Wheelchair Use

Suitable (according to EN 12529)

Suitable for Underfloor Heating

Suitable

EMICODE

EC 1PLUS – Very low emission

GHS/CLP Classification

GHS05, Corrosive

GGVSEV/ADR Classification

None

Technical Data Sheet

Declaration of Performancre

Safety Data Sheet

EMICODE Certificate

IMPORTANT NOTE

This Frequently Asked Questions (FAQ) section is prepared for general information purposes and does not constitute a definitive guide. For the most accurate and up-to-date information about repair, levelling, smoothing and filling mortars, especially ARDEX A 440, please refer to the product technical data sheets. For detailed information about product features, usage conditions, and application methods, we recommend consulting the ARDEX Turkey technical team. Before any application, obtaining expert advice on surface preparation and product selection will increase the success of the application.

How can I quickly fill, repair, and level surfaces indoors?

ARDEX A 440 is a versatile, high-strength mortar designed for filling, repairing, and leveling indoor surfaces on floors and walls. It is ready for further work in just 60 minutes.

What are common applications for ARDEX A 440?

ARDEX A 440 is used for repairing and leveling stair steps and landings, filling voids and holes in concrete and plaster, correcting surface heights, and fine smoothing and finishing tasks.

How do I mix and apply ARDEX A 440?

Mix 25 kg of ARDEX A 440 powder with approximately 6.50 – 7.50 liters of water. The working time is about 15 minutes, and the mortar can be walked on in approximately 60 minutes.