Dimpled High Density Polyethylene Protection Membrane with Perforations.

abe.®drain 20 P is a dimpled high density polyethylene (HDPE) membrane with 20 mm dimples including perforated slots.

abe.®drain 20 P is used as drainage and protection membrane for roof gardens and planter boxes in conjunction with a geotextile and a waterproofing membrane such as Index Defend H. The dimples retain water and excess water is drained away thereby preventing water stagnation.

  • Good value.
  • General purpose.
  • Water retention.
  • Water resource savings.
  • Protection of the waterproofing membrane.
  • Secondary waterproofing system.
  • Thermal insulation.
  • Excellent drainage capacity.
Typical Physical Properties

See technical datasheet

Horizontal Application

The surface area must be waterproofed according to a.b.e.® Construction Chemicals’ specification. This is not a primary waterproofing membrane but is recommended for buried dual layer system applications. The first layer consisting of a 3 mm abe® unigum torch followed by an antiriot bituminous membrane Index Defend H. Lay abe.®drain 20 P in place with the dimples facing downwards. Should it be necessary to overlap, then 150 mm would be sufficient. Apply super laykold waterproofing tape    100 mm wide along the flat part of the product for this purpose. Where required place a geotextile membrane loosely on top of the abe.®drain 20 P before spreading out the soil. This is important as the soil would otherwise fill the dimples and thereby reduce water drainage Spread out the soil according to the instructions of a qualified landscaper.

Cautionary Note

Do not butt-joint sheets.


Install abe.®drain 20 P as supplied using an overlap of 150 mm between the sheets resulting in an overall coverage of 35 m2 per roll.

Model Specification

The drainage and protection membrane will be abe.®drain 20 P a dimpled high density polyethylene protection membrane as supplied by a.b.e.® Construction Chemicals.

The abe.®drain 20 P will be applied in accordance with the recommendations of a.b.e.® Construction Chemicals.


In order to guarantee the quality and characteristics of the abe.®drain 20 P product, it is recommended to use the range of accessories specifically studied for each purpose. Please consult the technical department at a.b.e.® Construction Chemicals.


abe.®drain 20 P is supplied 5 rolls per pallet and wrapped for protection.

Handling & Storage

The product has no expiry date. Keep out of direct sunlight for extensive periods. No heavy loads are to be placed or packed on top of the product.

Health & Safety

No known hazards.

Important Note

This data sheet is issued as a guide to the use of the product(s) concerned. Whilst a.b.e.® Construction Chemicals endeavours to ensure that any advice, recommendation, specification or information is accurate and correct, the company cannot – because a.b.e.® Construction Chemicals has no direct or continuous control over where and how a.b.e.® Construction Chemicals’ products are applied – accept any liability either directly or indirectly arising from the use of a.b.e.® Construction Chemicals’ products, whether or not in accordance with any advice, specification, recommendation or information given by the company.

Further Information

Where other products are to be used in conjunction with this material, the relevant technical data sheets should be consulted to determine total requirements. 

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