Radon Top Hats are designed to provide a highly effective seal around service pipes in a gas membrane system. Where service pipework needs to penetrate a gas barrier membrane, you need to use these pre-formed Radon Top Hats to create a gas-tight seal. 
SIGMA GPS Top Hats have been manufactured from polymers that protect properties and occupants from harmful ground gases like radon. 
 
Each Top Hat comes supplied with 1x Jubilee Clip per unit.
 
*This product cannot be immediately ordered online and are advertised at £0.00 (POA) due to shipping being calculated based on quantity and location.
 
Please contact us for a quotation.
01256 657 011 or Sales@straight2site.co.uk