R4 Flowable Cementitious Repair Mortar

PRODUCT DESCRIPTION Tasir ®-MT04 is a cement based, one compon- ent flowable repair mortar (High Flow) containing shrinkage compensators and high range water-redu- cing agents, meeting the requirements of Class R4 of BS EN 1504-3. USES ▪ Horizontal or vertical repairs ▪ Bridges ▪ Marine......

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Tasir ®-MT04 is a cement based, one compon- ent flowable repair mortar (High Flow) containing shrinkage compensators and high range water-redu- cing agents, meeting the requirements of Class R4 of BS EN 1504-3.



▪ Horizontal or vertical repairs

▪ Bridges

▪ Marine structures

▪ Tunnels

▪ Buildings

▪ Fire damaged structures

▪ For exterior and interior use

▪ In place of R1, R2 & R3 mortars



▪ One component, ready to use

▪ Low shrinkage

▪ High mechanical properties

▪ Good flow properties

▪ Repair depths upto 150 mm in one application

▪ Can be poured or pumped

▪ Overcoatable with Sika reprofiling/levelling mortars and coatings


Conforms to the requirements of BS EN 1504-3 R4 Classification

Complies generally with the Highways Agency specific- ations for repairs to highways structures.











The concrete shall be free from dust, loose material, surface contamination and materials which reduce bond or prevent suction or wetting by repair materials. Steel reinforcement Rust, scale, mortar, concrete, dust and other loose and deleterious material which reduces bond or contrib- utes to corrosion shall be removed to a minimum standard of SA2½.

Reference should also be made to BS EN1504-10:2003 for specific requirements.


Where formwork is to be used, all formwork should be of adequate strength, treated with release agent and sealed to prevent leakage. Ensure formwork includes outlets for extraction of the pre-soaking water. A header box/hopper should be constructed on one side of the formwork so that a head of 150-200 mm can be maintained during the pouring operation.

Substrate Preparation Concrete:

Delaminated, weak, damaged and deteriorated con- crete and where necessary sound concrete shall be re- moved by suitable mechanical or very high pressure waterblasting [up to 110 mPa (16500 psi)] techniques. Tying wire fragments, nails and other metal debris em-bedded in the concrete should be removed where pos- sible.

The edges where concrete is removed should be cut at a minimum angle of 90o to avoid undercutting and a maximum angle of 135o to reduce the possibility of de- bonding with the top surface of the adjacent sound concrete and should be roughened sufficiently to provide a mechanical key between the original materi- al and Tasir ®-MT04 repair mortar.

Ensure sufficient concrete is removed from around re- inforcement to allow coating

and compaction of the repair material.

The concrete substrate should be pre-soaked with clean potable water continuously for 2 - 6 hours prior to repair mortar application.

Immediately before pouring repair mortar, remove all excess or standing water from within repair area, any formwork, cavities or pockets.

Steel reinforcement:

Surfaces should be prepared using abrasive blast cleaning techniques or high pressure waterblasting [up to 60 mPa (9000 psi)] techniques.

Where exposed reinforcement is contaminated with chloride or other material which may cause corrosion, the reinforcement shall be cleaned by low pressure waterblasting [up to 18 mPa (2700 psi)].

Reinforcement corrosion protection coating: Where a coating is required as a barrier, apply to the whole exposed circumference two coats of Tasir ®-MT01 or Tasir -EpoCement 01. (Refer to the relevant Product Data Sheet).

Reference should also be made to BS EN1504-10:2003 for specific requirements.


Place the water into a forced action mixer or in a clean drum. Slowly add complete bag ofTasir ®-MT04 into the water and continuously mix for 3 minutes in mixer to achieve a uniform and lump free consistency. Alternatively use a slow speed drill (200- 500 rpm) and spiral paddle mixer.


Pour the mixed Tasir ®-MT04 into the pre- pared repair area as soon as it has been mixed to maintain flow properties and no more than 30 mins to benefit from the shrinkage compensating properties. Ensure continuous mortar flow during the complete pouring operation to avoid trapping air.

For cold weather working consider using warm water to assist with achieving strength gain & other physical properties.

Reference shall be made to BS EN1504-10:2003 for specific requirements and any other guidelines that are specific to the structure.


It is essential to cure the repair mortar immediately after application for a minimum of 3 days to ensure full cement hydration and to minimise cracking. Use polythene sheeting taped down at the edges or other approved method.

Curing compounds shall not be used when they ad-versely affect subsequently applied products and sys- tems.

Reference shall also be made to BS EN1504-10:2003 for specific requirements.


Clean all tools and application equipment with water immediately after use. Hardened/cured material can only be mechanically removed.


▪ Refer to recommendations provided in BS EN 1504- 10.

▪ Avoid application in direct sun and/or strong wind and/or rain.

▪ Pour or pump from one side only when using shut- ters / formwork

▪ Do not use vibrating pokers

▪ Do not add water over recommended dosage.

▪ Apply only to sound, prepared substrates.

▪ Do not add additional water during the surface finish- ing as this will cause discoloration and cracking.

▪ Protect freshly applied material from freezing.


All technical data stated in this Product Data Sheet are based on laboratory tests. Actual measured data may vary due to circumstances beyond our control.


Please note that as a result of specific local regula- tions the performance of this product may vary from country to country. Please consult the local Product Data Sheet for the exact description of the application fields.


For information and advice on the safe handling, stor- age and disposal of chemical products, users shall refer to the most recent Material Safety Data Sheet contain- ing physical, ecological, toxicological and other safety- related data.



The information, and, in particular, the recommendations relating to the application and end-use of TASIR products, are given in good faith based on TASIR's current knowledge and experience of the products when properly stored, handled and applied under normal conditions in accordance with TASIR’s recommendations. In practice, the differences in materials, substrates and actual site conditions are such that no warranty in respect of merchantability or of fitness for a particular purpose, nor any liability arising out of any legal relationship whatsoever, can be inferred either from this information, or from any written recommendations, or from any other advice offered. The user of the product must test the product’s suitability for the intended application and purpose. TASIR reserves the right to change the properties of its products. The proprietary rights of third parties must be observed. All orders are accepted subject to our current terms of sale and delivery. Users must always refer to the most recent issue of the local Product Data Sheet for the product concerned, copies of which will be supplied on request.

Tasir Construction Material&Technology Corporate Headquarters

Tianda Block, Jianggan District,Hangzhou City, Zhejiang Province, China

Tel: +86-571-28119206 

Fax: +86-571-28197878

Specifications Subject to Change.

For most current version of datasheet, go to

© 2018Tasir Construction Material&TechnologyCp.,Ltd | 08-21-2018 Rev. H | China Owned & Operated

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