Enduroflex System Components and Accessories

Enduroflex™ EP1 Primer

Enduroflex EP1 Primer is a water based, low viscosity, single component, white primer intended for the adhesion promotion and stain blocking on various substrates. The product is a single component liquid and is supplied in plastic containers of 4 litre and 20 litre.

Enduroflex EP1 Primer is designed to improve adhesion of the Enduroflex liquid applied waterproof coating to the following substrates:

  • PVC or EPDM Synthetic Membranes
  • Plywood / OSB boards
Technical Characteristics
Pack Size: 4 litre and 20 litre
Appearance: Liquid
Colour: White
Density 1.02 kg/L
Coverage Rate (typical): 0.2 kg/m2 (may  depend on porosity of substrate)
Application Temperature Rate:

0° to 40° C (ambient)

Drying Time: 30 minutes to 1h 45 (at 23°C and 50%RH)
1h to 1h 30 (at 10°C and 50%RH)
Shelf life: Minimum 12 months between 5°C and 30°C


Instructions For Use

Substrate Preparation

Surfaces must be clean, dry and free of frost, dust, debris, oil or grease or any material which would hinder adhesion.

Apply only when the substrate temperature 3 °C above the dew point. If the surface is below or at dew point temperature then moisture can form at the surface and affect coating adhesion and curing.


Stir opened primer to ensure uniform material consistency. Once ready, apply the white primer (0.2kg/m²) onto the prepared substrate in a flowing motion and spread thinly using a brush or roller.

The Enduroflex liquid waterproofing system can be applied above the primed surface when the white EP1 primer coating cures to form a dry transparent film finish. Depending upon atmospheric conditions, curing time can vary from 30 minutes (at 23 °C / 50 % RH) to 1h30 (at 10°C / 50%RH).

ETE / CE marking

Enduroflex Liquid Applied Waterproofing system has been evaluated against ETAG 005 as certified in European Technical Evaluation document (ETE 015/0089), which provide CE marking for the Enduroflex product range.


Read the MSDS sheet on Enduroflex Acrylic Primer carefully before application.


Keep containers in dry areas and away from freezing.
Shelf Life: Minimum 12 months between 5°C and 30°C.
In winter, if possible, keep the containers at 20°C overnight before usage for an optimum use.


    Contact Icopal 0161 8654444

    Find Local Support

    For further information contact

    Technical Support


    +44 (0) 1908 015760

    Email: technical.uk@bmigroup.com


    Sales Enquiries & Orders


    +44 (0) 843 224 7400


    +44 (0) 843 224 7401

    Email: sales.admin@bmigroup.com


    Latest News

    Standard Industries Completes Acquisition of Braas Monier to Form Global Roofing Leader


    Icopal is now part of the GAF family


    Icopal Expands Its Elastoflex Liquid Applied Waterproofing Range


    This site uses cookies in accordance with our Website Privacy Policy. By continuing to browse the site you are agreeing to our use of cookies. To browse without the use of cookies, please you can opt-out as explained in our Website Privacy Policy or adjust your cookie settings for your browser. 

    Icopal Liquid Applied Waterproofing Systems