Icopal Siplast Primer

Icopal Siplast Primer

Icopal Siplast Primer is a low viscosity, black, bitumen priming solution consisting of high quality elastomeric bitumen and hydrocarbon solvent. It is designed to penetrate and seal dusty or porous substrates of masonry, concrete, cementitious screeds or renders, existing bituminous or asphalt waterproofing, structural steelwork and other metals, prior to the application of bituminous membranes

Product Availability

Product Code Description Container Size
3101970 Icopal Siplast Primer 25 L



Performance Data:
Colour: Black
Coverage Rate: 3 - 11 m²/litre (depending on porosity)
Application Rate: 0.1 - 0.3 litres/ m² (depending on porosity)
Drying Time: 1 to 3 hours (depending on ambient temperature)
Application Limits: +5 °C to + 30 °C (surfaces must be free of ice and water)
Container Size: 25 L


Application Benefits

Icopal S.A. Primer is applied using a brush or solvent resistant roller, allowing for easy, simple installation. The Icopal S.A. Primer has been formulated to have high tack properties making it ideally suited to upstands and vertical applications. The instant grab of the primer secures the membrane for a watertight seal once cured. 

Surface Preparation

Ensure the substrate is structurally sound, free of surface laitance, oils, grease, dirt, moss, lichen, and loose material.

The surface should be smooth and free from sharp projections and loose debris, and any material which would hinder adhesion.

Application Conditions

Apply only when atmospheric and substrate temperatures are greater than 5 °C. The surface of the substrate should be clean and dry and must be 3 °C above the dew point. If the surface is below or at dew point temperature, moisture can form at the surface and affect coating adhesion and drying.

Application Method

Apply a thin coat by brush or roller ensuring the primer is well applied into the surface while avoiding pooling of the primer. Apply at a rate of approximately 0.1 to 0.3 litres/m².

Once dry, ensure the primed surface is kept free of dust prior to the application of the bituminous membrane.

Drying Time

Allow to dry thoroughly before over coating. Drying time is dependent upon ambient temperature, atmospheric conditions and substrate porosity however Icopal Siplast Primer can be dry within two hours at 23 °C..


Icopal S.A. Primer is compatible with most building materials with which it is likely to come in to contact with. However, spillage onto hydrocarbon based materials, such as bitumen membranes and mastic asphalt, may cause some softening of those surfaces if left unattended. It is not suitable for use in combination with polystyrene or soft pvc products.

    Contact Icopal 0161 8654444

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