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Mastic Asphalt Roofing

Permanite Limited

Mastic Asphalt has a long and successful history as a flat roof waterproofing and its proven durability makes it the ideal choice for both Contractor and Specifier.

Perminite Ltd

Ruberoid is the leading manufacturer of mastic asphalt roofing in the U.K.

Our full range of products is available from Proos Roofing Supplies.

Product Range

Mastic Asphalt for Roofing (limestone aggregate) BS 6925: 1988 Type R 988.

Although Kitemarked and covered by BSI Certification these grades are manufactured to within much narrower requirements than those set in the British Standard specification.

Roofstar B
Product Code 4101
BS 6925: 1988
Type R 988/1/B
The basic roofing grade with an asphaltic cement composition of 100% bitumen, provides proven performance at an economic price


Roofstar T
Product Code 4102
BS 6925: 1988
Type R 988/1/T25
The addition of 25% Trinidad Lake Asphalt to the asphaltic cement gives improved laying qualities and greater thermal stability

Special Grades

Specialised roofing products are also available which include Acid Resisting, Coloured and Recreational Duty Grades.

Technical Advisory Service

A comprehensive technical advisory service for mastic asphalt suppliers, contractors and specifiers is available. Contact Proos Roofing Supplies for further information.

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