ARDEX AM 50 OCR – Standard Set One Coat Tiling Render

ARDEX AM 50 OCR is a high-performance, pre-blended sand and cement render that provides a perfectly flat background for tiling. Designed for professional use, this one-coat render can be applied from 6mm to 20mm thick in a single application and allows tiles to be fixed in as little as 24 hours. Ideal for internal wet areas such as swimming pool surrounds, showers, and changing rooms, ARDEX AM 50 OCR offers 20% more coverage than standard renders, saving both time and material cost.

Key Features & Benefits

• Fast Tiling: Ready to fix tiles after only 24 hours.
• Single Application: Apply 6–20mm thick in one coat for a smooth, flat surface.
• High Coverage: Delivers up to 20% more coverage at only 1.39kg/m²/mm.
• Extended Pot Life: Enjoy up to 4 hours of working time.
• Easy Mixing: Just add 4–4.5 litres of water per 25kg bag.
• Suitable for Internal Wet Areas: Perfect for showers, changing rooms, and swimming pool surrounds (not for full immersion).
• Slump-Free Mortar: Maintains excellent adhesion and stability on walls.

Product Overview

ARDEX AM 50 OCR is a pre-blended, one-coat render that only requires the addition of water to produce a consistent, slump-free mortar. It provides a durable and even surface, ready for tiling within 24 hours, reducing downtime and increasing project efficiency. Its superior formulation ensures excellent workability and open time, allowing smooth application and reliable results in demanding wet environments.

Technical Data

Mixing Instructions

For optimal results, add ARDEX AM 50 OCR powder slowly into clean water (4–4.5 litres per 25kg bag) while stirring continuously. Mix thoroughly using a mechanical paddle or electric drill with a 10mm chuck until a smooth, slump-free mortar is achieved. The render should hold on a trowel without sliding and support itself on the wall. Re-mix every 20 minutes during use to maintain consistency.

Application Guidelines

• Apply only at temperatures above 5°C.
• Start with a 1–2mm skim coat or bonding layer before building up to the required thickness (up to 20mm in one coat).
• For thicker applications, a two-layer method can be used – ensure the top layer is thinner than the first.
• Allow a minimum of 24 hours before tiling.

Packaging & Storage

Supplied in 25kg paper sacks with a polyethylene liner for moisture protection. Store unopened bags in a cool, dry place off the ground, away from excessive heat and draught. Shelf life is up to 12 months from the production date printed on the packaging.

Frequently Asked Questions

Can ARDEX AM 50 OCR be used externally?

No, it is designed for internal use only and is not suitable for full immersion or external applications.

How long before I can tile over ARDEX AM 50 OCR?

You can fix tiles after 24 hours under standard site conditions.

What type of surfaces can it be applied to?

Suitable for properly prepared in-situ concrete, brickwork, and blockwork walls.

Is it suitable for swimming pool areas?

Yes, ARDEX AM 50 OCR is suitable for use around swimming pool surrounds and wet areas, but not for areas under full water immersion.