BBA Polyurea Hot Spray – (Rayston Pure Polyurea )
we are able to offer clients and contractors an advanced hot spray Polyurea Waterproofing which also has the full BBA Certification- with the highest Fire Rating in Europe.
Life Expectancy – 25 Years (BBA independent testing) - Product Warranty 20 Years.
Application Method - the system involves a choice of 3 different Primers depending on the condition of the roof and then a final Coating of Polyurea Hot Spray waterproofing
Clean – the old asbestos roof in accordance with all Health and Safety Regulations.
Primer – here we have a choice of Primers depending on the condition of the Roof
A Primer GC - this is a Green Concrete primer which can also be used for wet/ damp asbestos cement. This is applied by Airless spray at a cover rate of 500gms per sq,m. This is a real Innovation in Europe -being able to apply even on wet/ damp surfaces.
B Polyurea Rayston X5 -this is expandable/ foaming polyurea which expands to 3-5 times its original volume. So 1mm coating can expand to between 3-5mm thickness to fill in all cracks and irregularities on the surface of the asbestos cement. This is then the Primer for this system.
C Rayston Primer 150 this is a high density structural spray foam which is ideal for very weak, brittle asbestos cement roofing, with an irregular surface. To achieve 1cm thickness you apply between 1.2-1.5kg per sqm.
Waterproofing BBA Rayston Polyurea. We have Approved Contractors who can spray 2kg per sqm onto the Primer and give a covering of 2kg per sqm of Polyurea -with INSTANT CURE-ideal for the UK weather.
Colour- the normal colour would be Dark Grey ( Ral 7011 ) which is an aromatic colour and can slightly discolour with UV light.
UV Stable Colour -if this is required we coat the polyurea with 200gms of pigmented Colodur (usually light grey Ral 7011 )