Liquasil Ltd

Liquasil Ultra Rapid PeMa

Manufacturer: Liquasil Ltd 

Materials: PeMa 

Liquasil Ultra Rapid PeMA is a liquid-applied, glass-reinforced, low odour, flexible modified polyester system, available in unpigmented or pre-pigmented versions.

The system consists of:
• Liquasil Ultra Rapid PeMA Base Coat resin — a flexible, low odour, modified polyester resin
• Liquasil Ultra Rapid PeMA Top Coat resin — a flexible, low odour, modified polyester resin
• Liquasil Ultra Rapid PeMA Pigment — a pigment dispersed in polyester resin
• Liquasil PeMA Catalyst — a 40% dibenzoyl peroxide suspension in a solvent mixture
• 450gsm Chopped Strand Glass Fibre Mat — a 450 g·m–2 glassfibre mat for reinforcing the system
• Liquasil Aggregate — an optional surface finish to provide an anti-slip surface if required.


BBA logo

Number: 22/5989
Issue date: 21/02/2022

Approved for use on


Flat Roofs Green Roofs Inverted Roofs Pitched Roofs Protected Roofs Warm Ballasted Roofs Zero Falls Buried Roofs 

Liquasil Ultra Rapid PeMA is satisfactory for use as a liquid-applied roof waterproofing system on new or existing roofs with limited(1) or pedestrian access(2) in the following specifications:
• exposed warm and cold flat and pitched roofs(1)
• protected warm and cold flat and zero fall roofs (ie covered by pavers or other suitable protection)
(1)(2)
• green (extensive) flat, zero fall and pitched roofs(1)(2)
• inverted flat and zero fall roofs(1)(2)

(1) Grades approved by the Certificate holder.
(2) The advice of the Certificate holder should be sought on compatibility with the system

Substrate


Aluminium Concrete Glass Glass Reinforced Polyester Insulation Boards Mastic Asphalt Metal Plastic Reinforced Bituminous Membranes Single Ply Membranes - PVC Steel Timber 

The system is suitable for use on the following substrates:
• concrete
• asphalt
• plywood(1)
• OSB 3(1)
• reinforced bitumen membranes (including sanded and mineral surfaced reinforced bitumen membranes)
• insulation(1)
• GRP
• single-ply membranes(2)
• previously-coated surfaces(2)
• small areas of metal incidental to the roof, eg pipe upstands
• small areas of plastic-coated metal incidental to the roof(1)

(1) Grades approved by the Certificate holder.
(2) The advice of the Certificate holder should be sought on compatibility with the system.

Durability


30 Years 

The system will achieve an initial life expectancy of at least 30 years. When fully protected, and subjected to normal service conditions in an inverted roof specification with an open covering (eg aggregate pavers), the system can provide an effective barrier to the transmission of liquid water and water vapour for the design life of the roof in which it is incorporated.

In situations where maintenance or repair of any of the components in the roof structure are necessary
(eg protection layer or insulation), the durability of the membrane may be reduced. In these circumstances the Certificate holder should be consulted.

An estimation cannot be given for the life of green roof specifications owing to the nature of use; however, under normal circumstances, it should be significantly greater than for exposed waterproof coverings.

Installation Requirements


The system is only installed by specialist roofing contractors who have been trained and approved by the Certificate holder.

Fire Safety


When tested to DD CEN/TS 1187 : 2012, Test 4, and classified under BS EN 13501-5 : 2016 the following system achieved a classification of BROOF(t4) and so is unrestricted by the documents supporting the national Building Regulations with respect to distance from a boundary:
• a flat roof system consisting of primed 18 mm thick orientated strand board, a 0.6 mm thick self-adhesive vapour control layer, a 120 mm thick, foil-faced polyisocyanurate insulation board bonded with a polyurethane adhesive, one coat of Liquasil Ultra Rapid PeMA resin at 1.5 l·m-2, a layer of 450gsm Chopped Strand Glass Fibre Mat reinforcement and one coat of Liquasil Ultra Rapid PeMA resin at 0.5 l·m-2(1)
• a flat roof system consisting of primed 18 mm thick orientated strand board, a 0.6 mm thick self-adhesive vapour barrier layer, a 150 mm thick, tissue-faced polyisocyanurate insulation board bonded with a polyurethane adhesive, a 2.0 mm thick self-adhesive carrier membrane, one coat of Liquasil Ultra Rapid PeMA resin at 1.5 l·m-2, a layer of 450gsm Chopped Strand Glass Fibre Mat reinforcement and one coat of Liquasil Ultra Rapid PeMA resin at 0.5 l·m-2(2)
(1) Fire Test and Classification reports, reference Q100928-1000 and Q100928-1001 respectively, conducted by BRE Global. Report available from the Certificate holder.
(2) Fire Test and Classification reports, references 20410B and 20410B respectively, conducted by Warrington fire. Report available from the Certificate holder.

In the opinion of the BBA, a roof incorporating the system will also be unrestricted by the national Building Regulations in the following circumstances:
• when used in protected or inverted roof specifications, including an inorganic covering listed in the Annex of Commission Decision 2000/553/EC,• irrigated green roofs.

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

The system, when used in pitches of greater than 70°, excluding upstands, should not be used on buildings in England and Wales that have a storey at least 18 m above ground level and 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.

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

If allowed to dry, the plants used may allow flame-spread across the roof. This must be taken into account when selecting suitable plants, and appropriate planting, irrigation and/or protection should be applied to ensure that the overall fire-rating of the roof is not compromised.

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Unit 8 Radway Industrial Estate
Solihull
West Midlands
B90 4NR

T : 0121 709 5352

E : dave@liquasil.com

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