weber.floor 4160 fine flow rapid 

weber.floor 4160 fine flow rapid is a pumpable, self levelling screed compound for floors, which gives a strong surface layer for early floor covering. It is formulated from aluminous cement, sand, additional binder and chemical admixtures. The product is rapid drying and allows early floor covering. weber.floor 4160 is slag and casein free. (grain size: < 1 mm.) and is self levelling and stable in humid conditions. weber.floor 4160 is a Swedish Research and Testing Institute certified product which is P-marked and type approved and CE-marked

weber.floor 4160 is designed as an underlayment screed for use in domestic and commercial areas on a wide range of floor surfaces, where speed of application and drying is essential and where high surface strength and early floor covering is especially required. The material is suitable for use with automatic mixing pumps as well as manually by hand.

Light ventilation in the work area is necessary but windows and openings must be closed sufficiently to avoid draughts during and after application. Indoor and floor temperature should exceed +10C during and after application and for one week after that. The relative humidity of the concrete floor must not exceed 95%. Dehumidifiers must not be used for the first two days

weber.floor 4160 is designed primarily for use on concrete substrates as well as for existing floors, including wood and chipboard flooring, gypsum board, stone/ceramics. The substrate should have a surface tensile strength of at least 1N/mm2(pull off strength)

The substrate should be clean, free from dust, grease and other impurities that might prevent adhesion. Holes and leaks in the substrate should be sealed. Floor drains etc. should be protected with lids and separated with stop ends. Large irregularities (>30 mm) should be filled and should be left to set before the next application. The surface should be mechanically prepared, vacuum cleaned and primed using weber.floor 4716primer according to the instructions on the data sheet. After application, and whilst the primer is still fresh, it should be lightly brushed to ensure a complete uniform film. The function of the primer is to improve adhesion to the substrate, to prevent air bubbles and to prevent de-watering of the floor compound before hardening.

weber.floor 4160 should be applied using a mixer pump approved by maxit. The material is mixed with 21% water, which corresponds to approx. 5.25 litres per 25Kg bag. Do not use excessive water. While mixing, the water content should be checked continuously by the flow ring test to ensure that the material is correctly mixed and free from separation. It is important to add only the specified amount of water as excess water will reduce strength, increase shrinkage and encourage segregation. Conversely reduced water content increases viscosity. The temperature of the mix should ideally be between +15C and + 20C.

The maximum width of the pumpable area varies from 6-8 metres depending on the pump capacity and application thickness. Wider areas can be temporarily divided with stop-ends. Pumping is carried out in sections so that each new section is pumped as quickly as possible and to maintain a wet edge. A wide spatula or spiked roller should be used to assist the self levelling process. On timber/wooden floors a mesh should be incorporated into the screed.

The screed can receive foot traffic after a drying time of 1-3 hours at an ambient temperature of +20C. The floor covering can be installed after 24 hours depending on the layer thickness and drying conditions. High humidity of the substrate and poor drying conditions prolong the setting time. For moisture sensitive coverings, eg wooden floors, the manufacturer's instructions should be followed.

Storage time in dry conditions and closed packages is 6 months. For deliveries in bulk the storage time is 3 months; longer times may have an adverse impact on the levelling properties.

Weber's Customer Services Department has a team of experienced advisors available to provide on-site advice both at the specification stage and during application. Detailed specifications can be provided for specific projects or more general works. Site visits and on-site demonstrations can be arranged on request.

Technical helpline
Tel: (01525) 722110
Fax: (01525) 718988

Weber products are distributed throughout the UK through selected stockists and distributors. For UK sales enquiries and overseas projects, contact Weber's Sales office.

Sales office
Tel: 08703 330070 (press 1 for sales)
Fax: (01525) 718988