Sikashield Hot Melt Structural Waterproofing System

Manufacturer: Sika 

Materials: Hot Applied Polymer Modified Bitumen (Hot Melt) 

The Sikashield Hot Melt Structural Waterproofing System comprises:

  • Sikashield Hot Melt 50/70 — a polymer-modified bitumen, blended with other additives, which is hot-applied in two layers to provide a waterproofing membrane with a nominal coating thickness of 6 mm
  • Sikeshield Roof F-50 UK — a non-woven polyester reinforcement fleece with a nominal weight of 50 g·m-2 which is embedded between the two layers of Sikashield Hot Melt 50/70
  • Sikashield Roof Access Layer UK — a glass fibre reinforced polymer modified bitumen membrane with a nominal weight of 2 kg·m-2
    , for use as a protection membrane
  • Sikashield E40G Sand UK — a sand-surfaced, polyester reinforced polymer modified bitumen membrane with a nominal weight of 4.8 kg·m-2
    , for use as a protection membrane
  • Sikashield E50 MG UK — a mineral finished, polyester reinforced polymer-modified bitumen membrane with a nominal weight of 5 kg·m-2
    , for use as a protection membrane

BBA logo

Number: 19/5682
Issue date: 27/04/2023

Approved for use on

Flat Roofs Green Roofs Inverted Roofs Protected Roofs Roof Gardens 

The Sikashield Hot Melt Structural Waterproofing System is satisfactory for use as a protected waterproofing layer on flat roofs (including those with zero fall) and podiums with limited access in:

  • inverted roof specifications
  • protected roof specifications, eg covered by paving or other suitable protection
  • green roofs (extensive) and roof garden (intensive) specifications.


Design Life of the Roof 

The system, when fully protected and subject to normal service conditions, will provide an effective barrier to the transmission of moisture for the design service life of the roof in which it is incorporated.

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

An estimate cannot be given for the life of green roof and roof garden specifications owing to the nature of use. However, under normal circumstances, it should be significantly greater than for open coverings.

Installation Requirements

The system must only be installed by contractors who have been trained and approved by the Certificate holder. Details of these are available from the Certificate holder.

Fire Safety

In the opinion of the BBA, a roof incorporating the system will be unrestricted under the national Building Regulations in the following circumstances:

  • protected or inverted roof specifications, including an inorganic covering listed in the Annex of Commission Decision 2000/553/EC, can be considered to be unrestricted under the national Requirements
  • a roof garden covered with a drainage layer of gravel 100 mm thick and a soil layer 300 mm thick
  • irrigated roof gardens and green roofs.

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

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

  • Downloads


Sika House
Miller Street

T : 01772 259781

Website disclaimer:

“The information contained in this Website is for general information purposes only. The information is provided by manufacturer members and their accreditation certifications and while we endeavour to keep the information up to date and correct, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with regard to information or products. Any reliance you place on such information is therefore strictly at your own risk.

LRWA Is not an accreditation body and does not test products or have a role in determining whether a product or system is fit for purpose. An agrément certificate is only issued for a successful product or system following a detailed assessment including both laboratory testing and inspections by the certificate provider.”