Flexcrete Monolite is a single component, polymer modified, fibre reinforced, low density cementitious repair mortar. The thixotropic nature of the product enables easy high build hand and trowel application for the repair of voids and the rendering and re-profiling of vertical, horizontal and overhead surfaces. 

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• Features & Benefits
• Preparation
• Mixing
• Application & Curing
• Application Top Tips
• Technical Data

Features & Benefits

• Simply mixed with clean water, part bags can be mixed
• Generally requires no substrate or inter-layer priming
• Ideal as a repair mortar for concrete, brick and stone substrates
• Excellent low sag properties
• Low density minimises additional dead load
• High bond strength exceeds tensile strength of concrete, ensuring monolithic performance
• UKCA & CE marked in accordance with EN 1504-3
• Highways Standard Series 5700 (Concrete Repairs) and CS 462 (Repair & Management of Deteriorated Concrete Structures)
• Compliant with LU Standard 1-085 ‘Fire Safety Performance of Materials’

Preparation

Mechanically remove all damaged concrete, brick or stone back to a sound core. Except in new construction, expose the full circumference of the steel reinforcement 25mm behind the bars and 50mm beyond visible corrosion.

On cutting back, feather edges must be avoided. Step the perimeter of the repair to a depth of 10mm preferably using a power chisel or by saw or disc cutting.

The areas to be repaired must be free from all unsound material including laitance dust, oil, grease, corrosion byproducts and organic growth.

Smooth surfaces should be roughened and reinforcement cleaned to bright steel using wet grit blasting techniques or equivalent approved methods.

• The compressive strength of the parent concrete should be minimum 20 MPa

The prepared substrate should be thoroughly soaked with clean water until uniformly saturated without any standing water.

Treatment of Steel Reinforcement:

Treat exposed steel reinforcement with 2 x 1mm coats of Flexcrete Steel Reinforcement Protector 841 applied by brush.

Priming of Concrete:

Monolite does not generally require a primer. Highly porous substrates may be primed with a polymer admixture slurry coat. The slurry coat should also be used when treating larger areas of waterproof concrete.

Mixing

Monolite should be mechanically mixed using a forced action pan mixer or in a clean drum using a slow speed drill and paddle. A normal concrete mixer is not suitable.

For normal applications, use between 2.7-3.1 litres of clean water per 18kg bag. For part bags, this equates to 6-7 volumes of powder to 1 volume of water. Typically, for high build applications use 2.9 litres of clean water per bag and mix for 2-3 minutes. Mix to entrain as little air as possible. Use without delay.

• Note - These instructions must be adhered to as Flexcrete will not be responsible for failure due to incorrect mixing.

Application & Curing

Monolite can be applied by float or trowel in single layers up to 100mm. Shuttering may be required to allow for compaction if working to reveals. Care must be taken to ensure that an initial thickness of mortar, typically 5-10mm, is well placed and adhered before building up to larger depths.

For multi-layer applications, it is important to ensure that previous layers are well keyed and stable but not fully set (typically 2-6 hours) prior to the application of subsequent layers. No inter-layer priming is required. Final profiling is achieved with a steel float.

All tools should be cleaned with water immediately after use. Materials can be stored for 12 months in dry, frost free conditions with unopened bags at +20°C.

Curing:

When curing, normal concreting procedures must be adhered to. Protect from strong sunlight and drying winds with polythene sheeting, damp hessian or similar.

Limitations:

Do not use Monolite when the temperature is below 5°C and falling.

Application Top Tips

• For multi-layer application, use the fingers of a gloved hand to stipple the surface of the first layer.
• Do not wet out or prime between layers
• If the mortar thickens, remix but do not add extra water
• Do not over trowel. If the mortar begins to slump, allow to stabilise and refinish
• When finishing, trowel from centre out towards the perimeter working into the edges of the repair
• For structural repairs, use Monomix and for areas subject to vehicular traffic use Monomix HD
• Cold Weather Working - ≥ 3°C on a rising thermometer, ≥ 5°C on a falling thermometer
• Hot Weather Working - Store material in cool conditions to maximise working life. If possible, avoid extreme temperatures by working at night

Technical Data