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Weber Saint-Gobain - Official website of the company

weberfloor 4360 base flow rapid

weberfloor 4360 base flow rapid
weberfloor 4360 base flow rapid

Product Benefits

weberfloor 4360 base flow rapid is designed for use on: ● Concrete ● Stone/ceramics

A pumpable, self-drying levelling floor screed

Product Features

About this Product

weberfloor 4360 base flow rapid is a pumpable, self-drying, levelling screed having a rougher surface structure than ordinary levelling compounds. Before floor covering, the surface must be primed and covered with a low alkali fine smoothing compound or a levelling compound. The material is supplied as a dry powder consisting of high alumina cement, natural sand, complementary binder and additives. The product is free from slag and casein.

weberfloor 4360 base flow rapid is recommended for applications where there is a need for thick layers of 20 - 80 mm and simultaneously reducing the drying time.

Features and Benefits

▲ Rapid drying - foot traffic after 2 - 3 hours ▲ Low alkalinity ▲ Recyclable raw materials ▲ Low emissions ▲ Casein-free

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


Send or download the documents

You can either send the documents to an email address, or download it

Preparation & Application



weberfloor 4360 base flow rapid is designed for use on concrete substrates and stone/ceramics. The substrate should have a surface tensile strength of at least 1 N/mm² (pull-off strength). 

Preparation and priming

The substrate should be clean, free from dust, grease and any other impurities that may prevent adhesion. Holes and leaks in the substrate should be sealed. Floor drains etc should be protected with lids and separated with stop ends. The surface should be vacuum cleaned and primed with weberfloor 4716 primer 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 has been applied. 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.


weberfloor 4360 base flow rapid should be applied using a mixer pump approved by Weber. The material is mixed with 18% water, which corresponds to 4.5 litres per 25 kg bag. It is important to add only the specified amount of water as excess water will reduce strength, increase shrinkage and encourage segregation. Whilst mixing, the water content should be checked continuously by the flow ring test (size 68 mm x 35 mm ring) to ensure that the material is correctly mixed and free from separation and lumps of powder. Conversely reduced water content increases viscosity. The temperature of the mix should ideally be between +15°C and +20°C.


Light ventilation in the work area is necessary but windows and openings must be closed to avoid draughts during and after application. 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 is used to assist the self levelling process.

weberfloor 4360 base flow rapid can receive foot traffic after a drying time of 2 - 3 hours at an ambient temperature of +20C. A smoothing or levelling compound should be used before covering with flooring (PVC or linoleum) Ceramic and terrazzo tiles can be laid after 24 hours.  A top screed can be installed after 3 days 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.

Packaging, Health & Safety


weberfloor 4360 base flow rapid is packed in 25 kg bags on plastic wrapped pallet.

Storage and Shelf Life

When stored unopened in a cool, dry place at temperatures above 5°C shelf life is 6 months from date of manufacture.

Health and Safety

Contains cement (Contains chromium (VI). May produce an allergic reaction). Harmful by inhalation. Irritating to eyes and skin. Keep out of the reach of children. In case of contact with eyes, rinse immediately with plenty of water and seek medical help. After contact with skin, wash immediately with plenty of soap and water. Wear suitable protective clothing, gloves and eye/face protection.

For further information, please request the Material Safety Data Sheet for this product.

Health and Safety

  • Low alkalinity
  • Low emissions
  • Casein free
  • Low natural emissions

Recyclable raw materials