Parex Thixtropic Joint Filler (TF)

1-component, cementitous, thixtropic mortar for joints between 5mm and 100mm




Our price

£35.95 £43.14 inc VAT


£44.94 £53.93 inc VAT

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Parex Thixtropic Joint Filler

Parex Thixtropic Joint Filler is a pumped mortar purpose-designed for filling joints and gaps in precast concrete units without the need for formwork. The thixotropic qualities of the mortar and non-shrink additives allow it to stay in place without slumping and to provide a complete high strength bond between sections. Before forming an initial set, it can be tooled off to provide a complete and smooth joint.

The material can be used for placing in horizontal and vertical gaps of 5mm to 100mm where a cementitious mortar infill is required and flow grouting is inappropriate. It requires only the addition of water on site and is mixed using a drill and paddle followed by hand or mechanical pump placement. For larger jobs mixer pumps can be used. Thixtropic Joint Filler is chloride-free and can be safely used in contact with steel reinforcement.

Uses includes structural support between and beneath precast concrete elements, permanent insitu shuttering in joints between precast concrete elements which will be post grouted and rapid placement using Duo-Pump systems.


Specification Outline

Placing of mortar for structural fill and support shall be carried out using Thixotropic Joint Filler as manufactured by Parex Ltd. The product must be stored, handled and used strictly in accordance with the manufacturer’s instructions.


Parex Limited has an integrated business management system. This is externally accredited by UK CARES to BS EN ISO 9001:2015, BS EN ISO 14001:2015, BS ISO 45001:2018 and BES 6001.


Final 240 minutes

When applied in strict accordance with this data sheet, TJF can be classified as a DC 4z material giving a 100 year design life where in service conditions do not exceed the following exposure classes: XC 4, XS 3, XD 3, XF 4, XA 1.


TJF has been tested in accordance with appropriate parts of the following standard EN12390.


Instructions For Use


Contact surfaces should be sound and clean. Remove all loose material, heavy mill scale and oily deposits.


The prepared surfaces should be pre-dampened. Remove any standing water before placing the TJF mortar.


Parex Thixtropic Joint Filler is supplied in 25kg bags. The water requirement to produce the mortar is 4.5 to 5.0 litres of water

Mixing Prior to Pumping

Pour the required quantity of water into a suitable mixing vessel. Slowly add the powder to the water whilst continuously mixing. Mechanical mixing is recommended. Suitable mixers include a slow speed high torque drill with a Mortar Stirrer or a forced action mixer such as Creteangle.


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