About this product
weber.floor 4050 medium finish floor screed is a rapid hardening, hand applied fibre reinforced flooring compound, which can be used over heated floors. It is supplied as a pre-blended powder and is designed for application between 15-100 mm. As a floating construction the recommended layer thickness is 25-50 mm. weber.floor 4050 is casein and protein free and resistant to alkaline moisture.
Field of application
weber.floor 4050 medium finish floor screed is used in most domestic and commercial floor applications that require either rapid drying slopes or levelling prior to the application of a wearing surface. weber.floor 4050 is can be used to floor heating systems with electricity or water circulation. weber.floor 4050 can be covered with ceramic tiles, stone tiles or parquet blocks. Prior to covering with PVC- and textile carpets, vinyl tiles or cork, the surface of weber.floor 4050 should be finished with weber.floor 4031fine smoothing compound.
Technical data
Substrate
The substrate should be clean, dry, free of dust, grease, and other impurities that might prevent adhesion. If it is a large area the surface should be treated by mechanical preparation by grinding or shot blasting. The surface strength of the substrate has to be at least 1 MPa (N/mm²). The substrate is vacuum-cleaned and primed with weber.floor 4716 Dispersion primer according to maxit substrate recommendations. Dry and very porous substrates must be treated twice.
Preparation and priming
The substrate should be mechanically prepared to remove impurities that might prevent adhesion and then vacuumed cleaned. Surface tensile strength of the substrate should be above 1.0 N/mm2. The substrate is primed with weber.floor 4716 primer -a mixture with water according to the instructions on the data sheets for weber.floor 4716. The function of the primer is to improve adhesion to the sub-floor, to prevent air bubbles and to prevent de-watering of the floor compound before hardening. Dry and very porous substrates (castin- situ concrete floors) must be treated twice. The temperature of the work area and substrate should be between +10 C and +25 C
Mixing
weber.floor 4050 should be mixed into 3.8- 4.5 litres of clean water (15- 18%) per bag. The material and water should be mixed using a drill fitted with a paddle or a mixer for a minimum of 2 minutes, until a paste consistency is achieved. Pot-life is approx. 20 min after mixing with water. Do not use excessive water, as the strength of the screed will be reduced. Ensure that the material is correctly mixed and free from separation.
Application
The compound should be spread with a smooth steel trowel.
After treatment
weber.floor 4050 floor screed can be covered with ceramic tiles, stone tiles or parquet blocks. Prior to covering with PVC- and textile carpets, vinyl tiles or cork, the surface of weber.floor 4050 should be finished with weber.floor 4031 fine smoothing compound. Because of the moisture expansion, a plywood board must be installed under the strip pattern parquet that is glued to the substrate. The surface underlayment should not be painted or used as a finished surface.
Drying time
If necessary, the surface can be ground and/or levelled over with weber.floor 4031 after 3-4 hours from application. The screed except foot traffic after having dried for 2-3 hours at an ambient temperature of +20˚C. Layers less than 20 mm thick can be covered after 1 day in normal levelling conditions (+20˚C, 50% RH). The thickest layers dry in approx. 3 days.
Storage and Shelf life
6 months under dry conditions.
Health and Safety
Hazardous- contains cement, which is an alkaline when wet and can cause skin irritation. Use eye protection, gloves and barrier cream and avoid prolonged skin contact. Avoid inhalation of dust.Wash skin contamination away with warm, soapy water. Remove splashes to the eyes by prolonged irrigation and consult a doctor. Do not ingest. Refer to Health and Safety Data Sheet.
Technical services
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
Sales Contact
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
