Rødvig Jurassic Mortar KKh 20/80/475

Rødvig Jurassic Mortar KKh 20/80/475
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Product Description

Rødvig Jurassic mortar KKh 20/80/475 is a premixed hydraulic lime mortar, which only requires the addition of water before use. It consists of hydrated lime (dried slaked lime), natural hydraulic lime (NHL 5) and Kronhøj Mortar Sand in the ratio 1:3:9, grain size (0-2,0) or (0-4,0).

Field of Application

Rødvig jurassic mortar KKh 20/80/475 is suitable for the bricklaying of tile and unhewn stones, for laying ridge tiles and hip tiles, as well as laying roof tiles on masonry and ridges. Furthermore, it can be used for interior floors of tile and unhewn stones, as well as plastering and pointing.


Rødvig Jurassic mortar is stored and sold in 25 kg bags (approx. 15 litres). For large projects, we can deliver in Big Bags or silo. For further information, please don't hesitate to contact us. 

Rødvig Jurassic mortar can also be delivered as a coloured 2-component mortar.

Additional Information

KALK A/S has been the market leader for many years with products used for renovation of conservation and listed buildings among others. The products can also be used for new construction because of the good physical properties of the material: 

  • Great flexibility in use
  • Great elasticity and adhesion
  • High tensile strength
  • Good porosity, which provides excellent insulation and moisture conditions

We have extensive experience in assisting clients in the use of our products. The technical guidance, which we can offer, merely serves to aid you with experiences. Therefore, we do not take on the responsibility of being planning technicians. With regards to renovation work, we can refer to technicians who are familiar with renovation work on buildings worthy of preservation. 





Rødvig Jurassic Mortar is mixed in a compulsory mixing machine for 20 min. A whisk (500-800 watt) on a drilling machine can be used for smaller portions. First, water is poured in the tub, then the dry product. Mix until homogeneous. The amount of water, which is added, depends on what the mortar is for. Don't mix more mortar than you can use in about two hours. 

When manufacturing coloured mortar, mix 1 bag of Rødvig slaked lime mortar K 100/750 with the desired colour to 2 bags of Rødvig jurassic mortar Kh 100/400. If you only need a small portion, you can mix half of a bag of Rødvig slaked lime mortar to 1 bag of Rødvig jurassic mortar Kh 100/400.


The underlying surface must be thoroughly cleaned. Loose particles and plaster flakes must be removed. To achieve the best adhesion when plastering and the like, the surface has to be rough and absorbent. Watering down the base is usually necessary when plastering. 

Limitations of Use

Ready-mixed mortars should normally be used within a few hours. Freezing point depressants or other additives should not be added. Once the mortar is mixed, you should no longer add binders, aggregates or water.

You should only work with the mortar when the temperature is above +5° and below +25°. If the mortar is used as a plastering mortar, the thickness of the layer should not exceed 2-3 times the maximum grain size per workflow. If the thickness of the layer is coming out too thick, there is a risk of cracking.


Dry products in bags should be stored in a dry environment raised from the ground on pallets with ventilation on all sides. This is so that condensation is avoided.


You can find product sheet, safety data sheet and performance declaration for Rødvig Jurassic Mortar KKh 20/80/475 by clicking on the image below.