BBA Agrément Certificate
A two component, rubber/ bitumen liquid waterproofing system, designed for concrete and steel bridge and trafficked decks.
A two component, rubber/ bitumen liquid waterproofing system, designed for concrete and steel bridge and trafficked decks. Servipak® Protection Boards comprise selected fillers bound in a bitumen compound, laminated between 2 layers of durable bituminous felt. The boards are laid bonded to the Servidek membrane to provide protection against damage from hot and cold applied finishes.
Concrete surfaces to be levelled and screeded to form a uniform surface. On hardening and after bleed water evaporation, the concrete should be trowelled to produce a hard dense surface free of screed marks and exposed aggregate. Finally, lightly texture the surface with a wooden float or equivalent. Maximum deviation in surface profile shall be 10 mm over a 3 metre gauge length and any abrupt irregularities over 3 mm shall be removed or filled with high strength repair mortar.
The concrete deck should be clean, and free from ice, frost, laitance, loose aggregate, oil grease, moss, algae growth, dust and any other contaminants that could decrease adhesion between the concrete and the waterproofing system. Damp surfaces are acceptable but any surface water should be removed by sweeping or with air lances. Apply to green/ fresh concrete only when necessary. If concrete curing compounds/ membranes that could impair waterproof membrane adhesion have been used, test a sample of Servidek for adhesion to determine if removal is necessary.
Mix parts A and B of Servidek® compound on site to a combined volume of 22.5 litres and spread immediately with a squeegee at a rate of 10–12 m²/ 22.5 litre unit, depending on substrate surface and temperature.
Full thickness overlays must be laid as soon as possible after the waterproofing is installed, ideally within 48 hours. Servidek®/ Servipak® is designed to be self-protecting during the installation of all conventional bridge and trafficked deck structure overlays and wearing courses, including:
J30/10 Cold applied damp proofing
J30/130 Cold applied damp proofing . . . . . .
J31/110 Cold deck roof coating
J31/5 Cold deck roof coating
Servidek®/ Servipak® System
Dry film thickness (minimum)
Into wet coating
Joints between boards
Apply Primer B2 and Armourtape
© 2020 NBS Enterprises Ltd. All rights reserved.