Febond SBR Bonding & Waterproofing Agent - 5 Litres Description Febond SBR is a styrene-butadiene co-polymer latex specifically designed for use with with cementitious mixes and as a reliable water resistant bonding agent. Ideal for concrete strengthening and repair, floor screeds and toppings, waterproofing and tanking. Application Rendering to vertical surfaces: Apply the bonding slurry to the prepared surface and apply the render while the bonding slurry is still wet or tacky, generally within 15 minutes. It is preferable to apply febond sbr modified mortars in coats to a maximum thickness of 6mm per coat, as greater thickness' can lead to slumping, however several coats can be applied in fairly rapid succession, usually within 15 to 30 minutes. Thicker coatings can be applied providing suitable formwork is used. Close the surface using a wooden float or steel trowel. Alternatively, scratch the first coat of render after application and allow to dry overnight before applying the second coat. This technique is preferred for rendering where the drying rate is low but not recommended when waterproofing. Another method is to allow the first coat of render to dry overnight and then apply a further slurry coat before applying the second coat of render. Screeds and toppings, applied to horizontal surfaces: Screeds, patches, etc based on febond sbr modified cements, can be laid to any thickness from 40mm down to 6mm minimum. After mixing, the febond sbr modified mix should be placed over the still wet bonding slurry, well compacted and struck off to level. It may then be trowelled to the required finish using a wooden float or steel trowel. Please note whenever screeds are being laid over exisiting concrete surfaces, it is important that expansion joints in the sub-floor are carried through the febond sbr modified mix. This can be done by fitting a temporary timber batten wrapped in a layer of polythene. Curing & after treatment: Correct curing of febond sbr modified mixes is important moisture cure for at least one day and then allow to dry out slowly. Initial curing is necessary to ensure hydration of the portland cement. The latex mortar must then be allowed to dry out to permit the latex particles to join together to form continuous films and strands. Storage Stir before use and protect from frost, febond sbr may be permanently damaged by freezing, particularly if thawed quickly. Shelf life Up to one year when stored under normal conditions and temperatures, 5 to 20C.