Parex Historic Mortar KL
Parex® Historic Mortar KL is a traditional hydrated lime, sand, GGBS mortar. Consistent in both colour and finish, Parex® Historic Mortar KL is pumped deep into the joint, providing a complete fill and a degree of flexibility.
- Fast Application
- Cost Effective
- Complete Joint Fill
- Stain-free & Colour Consistent
Usage
Designed for gun-injection, Parex® Historic Mortar KL is suitable for use with dense masonry and brick tiles, eg. Corium Brick Cladding System, where porosity is low and suction is limited.Advantages
CHARACTERISTICS / ADVANTAGES- Fast Application
- Cost Effective
- Complete Joint Fill
- Stain-free & Colour Consistent
Packaging
25 kg Bag
Product Details
APPROVALS / CERTIFICATES
EN998-2
Shelf life
12 Months from date of manufacture
Storage conditions
Dry frost free conditions
Compressive strength
Class M5
Thermal conductivity
P=50 % 0.81 W/(m.K), P=90 % 0.88 W/(m.K)
Water absorption
0.06 kg/(m2 min0.5)
Water permeability
μ 15/35
Reaction to fire
Class A1
Application
Mixing ratio
Water 3.75 L per 25 kg
Consumption
Coverage will vary according to the width and depth of the joint - on brickwork with 10 mm joints filled to a depth of 15 mm, 1 bag of mortar will cover approximately 5.5 m2 of wall area.
APPLICATION
Instructions for Use
Joint Preparation
In order to ensure adequate bonding of the new mortar to the masonry, it is important that the old mortar is removed and that any residual dust is removed from the joint. Cut out defective mortar to a minimum depth of 8 mm or 1.5 times joint width. Flush out with compressed air or water and leave surface damp.
Mixing
Mix whole bag of powder. Place 3.75 L of clean water in a mixing tub and gradually add dry Parex® Historic Mortar KL whilst mixing (the quantity of water will vary with the colour used). Mix using a low speed/paddle mixer with clean water to produce a mortar with a consistency of finishing plaster. Allow to stand for 5 minutes and remix. To check consistency, fill the pointing gun to within 12 mm of the top and shake. Check correct consistency by filling the tube, the mortar should hang from the end of the nozzle when the tube is shaken. A ribbon of mortar should appear from the nozzle.
Placing
Keeping the nozzle just clear of the wall, inject the mortar into the joint, slightly overfilling, working from the top of the wall downwards. The mortar should be tooled off after it has formed a semi-dry surface skin and lost its initial sheen. The time this takes depends upon the absorbency of the masonry. Place the nozzle the face of the joint and inject the mortar filling the perpendiculars first and starting from the bottom of each joint. Finish the horizontal joints after 1-2 metres have been completed to the required profile. Parex® Historic Mortar may be placed at temperatures between +5 °C and +35 °C. Do not carry out jointing work if rain is expected.
FAQ
Yes, to help you with project designs, we can supply bagged samples or pointed sample panels to allow sign off from your client.
Sika's specification team are happy to support you with this.
To ensure adequate bonding of the new mortar to the masonry, it is important that the old mortar is removed to a minimum depth of twice the joint width, and that any residual dust is removed from the joint.
If the masonry is porous, joints should be wetted down priorto repointing to prevent excessive suction.
The rate at which mortar dries can be affected by the porosity of the brick/stone being pointed and associated substrate. Suction rate can be determined by applying water either by brush or spray to the brick/stone surface and observing the rate at which the water is absorbed.
Excessive suction can be controlled by spraying the area to be pointed pre and post pointing. Failure to control excessive suction may lead to the formation of cracks and fissures forming once the mortar has cured. The pointing of brick slips with very little suction, or alternatively high suction, will greatly affect the point at which the mortar may be tooled off and this factor needs to be considered from an operational perspective. This effect is even more marked at low temperatures or unusually high temperatures. It is essential to protect the pointed façade, whilst curing, during freezing or wet weather.
Sika completed the acquisition of the French company Parex on May 23, 2019. Sika and Parex are two strong companies that are highly complementary in product offering and channel penetration and this acquisition has expanded our product portfolio for the Building Finishing market. Prior to this acquisition, Parex acquired established renders, insulated facades and aggregates company Enewall Ltd, based in Scotland.
Yes, our Mineral Render, External Wall Insulation (EWI) and Pointing Mortar training sessions are aimed at contractors, applicators and distributors who are looking to expand their knowledge or improve skills. Further details can be found on our Sika Wishaw Training Centre web page.