Sheetseal GR is a cold applied, high density polyethylene film bonded to aluminium foil and coated with a bitumen/rubber self adhesive layer with a removable reinforced silicone release paper. Sheetseal Primer is a bitumen solution.
Sheetseal GR is typically used to reduce the passage of methane gas and carbon dioxide on, or in the vicinity of landfill sites. The membrane is also suitable for use on sites contaminated by town gas installations or where other harmful gases are present. In addition, Sheetseal GR provides a water and water vapour barrier.
When designing a Type A (barrier) protection (as classified in BS 8102:2009), the product applied correctly is capable of providing the levels of protection required for grades 1, 2 & 3 basements. Sheetseal Primer is used on all vertical or inclined surfaces, to aid adhesion of the Sheetseal GR membrane.
Subject to normal conditions of use Sheetseal GR will provide an effective barrier to methane gas, water and water vapour for the life of the structure. The membrane is not designed for permanent exposure and must be protected by a screed, paving slabs, insulation etc.