Feb Febond SBR is a styrene-butadiene co-polymer latex specifically designed for use with cementitious mixes and as a reliable water resistant bonding agent.
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£53.99 +VAT
Feb Febond SBR is a styrene-butadiene co-polymer latex specifically designed for use with cementitious mixes and as a reliable water resistant bonding agent. It is used in mortar and concrete as an admixture to increase water and abrasion resistance and durability.
Ideal for concrete repair.
| Chemical Base | Styrene-butadiene copolymer latex |
| Packaging | 5ltr and 25ltr jerrys |
| Colour | White |
| Shelf Life | 12 months when stored under normal conditions and temperatures (5°C - 20°C) |
| Storage Conditions | Stir before use. Protect from frost, Feb® Febond® SBR may be permanently damaged by freezing, particularly if thawed quickly |
| Consistency | Liquid |
| Chemical Resistance | Resists mild acids, alkalis, sulphates, chlorides, urine, dung, lactic acid, sugar, etc. |
| Yield | When using as a bonding coat 1 litre of Feb® Febond® SBR will typically produce enough slurry to coat 3 square metres of substrate dependent on surface texture and thickness applied. For all normal use the standard dose of 10 litres of Feb® Febond® SBR per 50 kg Portland Cement is adequate. For extreme conditions and/or where adhesion, waterproofing, water vapour resistance or chemical resistance are critical, the dosage should be increased to 15 litres of Feb® Febond® SBR per 50kg Portland Cement. For this higher dosage, the extra water addition required is low and, therefore, use of wet aggregate may result in excessive workability. |
Surfaces to which Feb® Febond® SBR mixes are to be applied should be clean, sound and free of deleterious substances. When repairing spalled or damaged concrete, ensure that the concrete has been cut back to thoroughly sound material. Always lay to a minimum 6mm deep saw cut edge, depending upon application. Avoid “feather edging’
Bonding Slurry
Wet down absorbent surfaces, such as concrete and brick, so that they are damp but surface dry when the bonding slurry is applied. Prepare a bonding slurry of approximately 1.5 parts of OPC to 1 part of Feb® Febond® SBR by volume. The normal method of applicaton is by stiff brush scrubbing well into the surface, taking care to ensure complete coverage. A typical single slurry coat has an average thickness of 0.3 to 0.5mm and thickness’ significantly above this should
be avoided. If a second coat is necessary it should be applied at right angles to the first. Never apply more than can be comfortably over-screeded/rendered within 15 minutes.
Mixing should preferably be carried out in a forced action mixer, a Crete angle is recommended. Hand batching is only permissible when the total weight of the mix is less than 25kg. Charge the mixer with the required quantity of sand and cement and pre-mix for approximately one minute. Pour the desired quantity of Feb® Febond® BR and mix for about 30 seconds only, to minimise air entrainment. Slowly add water, whilst still mixing, until required consistency is obtained. (Stop mixer when testing consistency). The total mixing time after adding the Feb® Febond® SBR should not exceed two minutes. Owing to the strong plasticising properties of Feb® Febond® BR, rapid thinning can occur – avoid adding excessive water.
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 Feb® Febond® BR 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 Feb® Febond® SBR modified cements, can be laid to any thickness from 40mm down to 6mm minimum. After mixing, the Feb® 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. Note: Whenever screeds are being laid over existing concrete surfaces, it is important that expansion joints in the sub-floor are carried through the Feb® 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 Feb 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.
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