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Waterproofing & Membranes

Longseal 100 Tanking Membrane

From £79.00 Per Roll

Longseal bitumen-based tanking membranes are cold-applied membranes for use with tanking applications; creating a water-barrier to prevent water passage in underground structures including:

  • Internal and External tanking of underground structures
  • Car Park and Roof Decks
  • Lift Shafts and Retaining Walls
  • Reservoirs

Longseal 100 meets the requirements of BS/EN13969.

 Next Day Delivery Available
 £98 per roll or £79 per roll when ordering 10+
 5 Litre Primer only £21.95 each

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Rubber Bitumen Thickness 1.40mm
Polyethylene Backing 0.10mm
Total Thickness 1.50mm
Roll Width 1050mm
Roll Length 19.05m
Roll Weight 34kgs
Potential Coverage
(Subject to standard overlaps)
20m²

Key Features

  • Excellent overlap integrity due to bitumen to bitumen joint using zip strip 
  • Factory controlled thickness 
  • Rapid and easy cold application 
  • Flexible and accommodating giving excellent bond to substrate 
  • Non-hazardous and resistant to dilute acids and alkalis 
  • High performance protection against surface and ground water and soluble salts such as sulphates and chlorides 
  • Capable of resisting a 6 metre head of water when fully supported

Longseal 100 Application

Firstly, it is important that the surface is clean and free from dust and grit, as well as having no cavities and cracks visible. If cavities or cracks are apparent in the surface, use a mastic filler before applying the primer to smooth the surface ready for the waterproof membrane. Then, a primer can be applied to improve bonding in certain applications. Once the primer is applied, then the membrane can be administered. The membrane should then be immediately covered with a cementitious screed or similar protective layer. 

Tanking membrane Schematic
Physical PropertiesValueTest Method
Membrane Strength

Length 4.2 N/mm

Width 4.8 N/mm

ASTM D638
% Elongation of membrane

Length 210%

160% Width

>1300

ASTM D638
Water penetration at Joint NIL MOAT 27 (5.1.4)
Vapour Resistance 600MNs/g BS3177
Puncture Resistance 220N ASTM E154

Storage

The membrane rolls must be stacked on end and stored in dry, well-ventilated buildings, out of direct sunlight or other major sources of heat. Storage conditions should be adjusted before application to bring the temperature of the rolls to within the relevant specified application range.

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Delivery Information

We are able to arrange delivery to your home, premises, or site, at a time convenient to you. We can liaise with your site manager to organise safe and quick offloading where necessary.


Please enquire for more information.

Card image

Delivery Information

We are able to arrange delivery to your home, premises, or site, at a time convenient to you. We can liaise with your site manager to organise safe and quick offloading where necessary.


Please enquire for more information.




I need this item ASAP, what can you do? We usually are able to offer next day delivery on stock items. The best way to find out is to call us and we'll try to go the extra mile to help you out.

I need [number of] [product] by [date]. Is this possible? Clearly the complexity of the project, product, process is the limiting factor, but we do try to offer the fastest turnaround possible. Please contact us with your specific requirements and we'll get back to you with a response.

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NEXT DAY DELIVERY On all our stock products

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On all our stock items

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