Derbigum SP

Dual Reinforced Membrane Specified for Exposed Waterproofing

The Derbigum SP (Special Polyester) range of products has been designed to meet the specific requirements for waterproofing in exposed situations. The product is manufactured in South Africa to suit the harsh African climate and conditions.

Fields of application

The Derbigum SP range has been designed and developed for waterproofing in situations such as:

Concrete Roofs
Timber Boarded Roofs
Wide Gutters
Parking Decks
Insulated Roofs

Features

Excellent tensile strength and elasticity.
Excellent weathering properties.
Temperature stability.
High impact and fatigue resistance.

Derbigum Special Polyester 4 mm Roofing is a high performance, UV stable, polymer modified bitumen waterproofing membrane. This dual reinforced product comprises of a high strength polyester core and a top layer of reinforced glass tissue. Derbigum Special Polyester Roofing is compatible with most existing materials, and systems.

Primary Uses

SP3	SP4	SP5
Parapet Walls	Exposed Roofs	Parking Decks

Presentation

	SP3	SP4	SP5
Thickness	3 mm	4 mm	5 mm
Width	1000 mm	1000 mm	1000 mm
Length - roll	10 m	10 m	8 m
Weight - per meter 2 (approx.)	± 3.2 kg/m²	± 4.2 kg/m²	± 5.25 kg/m²
Weight - per roll (approx.)	± 32 kg	± 42 kg	± 42 kg
Polyester	≥ 100 g/m²	120 g/m²	120 g/m²
Glass Fibre	50 g/m²	50 g/m²	50 g/m²

SP4 Physical Properties

Tensile Strength	50 mm	Longitudinal 469N	Transverse 374N
Tensile Elongation		Longitudinal 40%	Transverse 55%
Tear Strength	Die No. C - ASTM D624	Longitudinal 72N	Transverse 77N
Flexibility	Derbigum SP4 was formed over mandrels diameter 100 mm, 50 mm and 20 mm at 0°C. Cracking of the surface occurred over 20 mm mandrel only.
Dimensional Stability at High Temperature	Test 28 days exposure at 80°C: movement less than 1 mm/m

Specifications are subject to change without notification. Results shown reflect the minimum performance required
and show the typical test procedures used. Actual field performance will depend on installation methods and site conditions.

Cross Section of Derbigum SP

cross section of Derbigum SP

For information on application, safety and storage, please download the data sheet.