Proteus Waterproofing

Proteus Pro System Plus Roof Waterproofing System

Manufacturer: Proteus Waterproofing 

Materials: Polyurethane 

Proteus Pro-System Plus Roof Waterproofing Systems have a finished thickness of 1.8 or 2.2 mm, and consist of:
• Proteus Pro-System Plus — a single-component, liquid-applied, moisture-triggered, aliphatic polyurethane. Available in standard colours of Mid Grey and Light Grey.
• Pro-Prime(1) SA — a primer for concrete substrates
• Pro-Epoxy Primer— a two-part primer for the treatment of previously untreated metal surfaces and for spot priming of areas of corroded metal after preparation
• Pro-Force — a non-woven glass fibre reinforcing mat which is embedded in the polyurethane while still wet, and available for use in strips to cover individual cracks, joints or details
• Pro-Carrier Membrane SA — a self-adhesive membrane for fully bonding over substrates with open joints, such as insulation boards, as a supporting layer
• Pro-Aggregate — to provide a non-slip finish to the final coat

(1) Pro-Prime is a registered trademark of Proteus Waterproofing Limited

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Number: 21/5980
Issue date: 11/01/2022

Approved for use on

Flat Roofs Pitched Roofs 

Proteus Pro-System Plus Roof Waterproofing Systems are satisfactory for use as a waterproofing layer on new and existing, flat and pitched limited access roofs.


Concrete Insulation Boards Metal PUR or PIR Insulation Reinforced Bituminous Membranes Single Ply Membranes - EPDM Single Ply Membranes - PVC Single Ply Membranes - TPO Timber 

The systems are suitable for use on the following substrates:
• concrete (primed)
• bituminous roofing felt, including mineral surfaced
• single-ply membranes including PVC, TPO and EPDM. The Certificate holder should be consulted with regard to the appropriate primer
• metal (primed)
• Pro-Carrier Membrane SA
• existing coatings/roof paints
• timber in conjunction with Pro-Carrier Membrane SA
• polyisocyanurate (PIR) foam insulation boards in conjunction with Pro-Carrier Membrane SA.


25 Years 

Proteus Pro-System Plus Roof Waterproofing Systems will achieve an initial life expectancy of at least 25 or 30 years depending on the specification used.

Installation Requirements

Installation of the systems must be carried out only by specialist roofing contractors trained and approved by the Certificate holder.

Fire Safety

When tested to DD CEN/TS 1187 : 2012, Test 4 and classified in accordance with BS EN 13501-5 : 2016, the following system achieved a BROOF(t4) classification:
• a first coat of Proteus Pro-System Plus applied at 1.0 litre per m2 reinforced with Pro-Force reinforcement, and a topcoat of Proteus Pro-System Plus applied in two coats at 0.7 litres per m2
• Pro-Carrier Membrane SA
• a layer of Primer 600
• 80 mm thick PIR insulation board adhered using polyurethane adhesive
• self-adhesive vapour control layer
• 18 mm plywood substrate.

The designation of other specifications should be confirmed by reference to the requirements of the documents supporting the national Building Regulations.

In England and Wales the system, when used in pitches of greater than 70°, excluding upstands,
should not be used on buildings that have a storey at least 18 m above ground level and which contain
one or more dwellings, an institution, a room for residential purposes (excluding any room in a hostel,
hotel or boarding house), student accommodation, care homes, sheltered housing, hospitals or
dormitories in boarding schools.

In Scotland the system, when used in pitches of greater than 70°, excluding upstands, should not be
used on buildings that have a storey more than 11 m above ground level.

Roofs incorporating the components have been tested to DD CEN/TS 1187 : 2012, Test 1.

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Proteus Waterproofing

21a Sirdar Road
Brook Road Industrial Estate

T : 01268 777871

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