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Weber Saint-Gobain - Official website of the company

weber accelerateur monocouche

weber accelerateur monocouche
weber accelerateur monocouche

Product Benefits

  • May be used to reduce the time of scrape for through-coloured Monocouche renders
  • For use at temperatures over 5°C for Monocouche work in the winter
  • Ideal for use when hand mixing or using a diesel driven render pump (i.e. with separate mixing and pumping chambers)

Liquid additive accelerator for Monocouche renders

Product Features

About this Product

weber accelerateur monocouche is a liquid setting accelerator solution for Monocouche through-coloured renders to speed up the time to scrape during colder application periods.

Features and Benefits

  • As a liquid component it can directly replace a proportion of the product gauging water
  • If added at the correct dose it will achieve 20°C scrape times when working at 5°C.
  • Colourless liquid has no effect on the appearance of the finished product


weber accelerateur monocouche is not an antifreeze.
weber accelerateur monocouche is not suitable for warm weather work other than sample areas.

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

Sales, England and Wales
Tel: (01525) 722100
Fax: (01525) 718988

Sales, Scotland
Tel: (0141) 445 0121
Fax: (0141) 445 0122

Sales, Ireland
Tel: (028) 9335 2999
Fax: (028) 9332 3232


Send or download the documents

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

Preparation & Application


The instructions regarding the application of Monocouche renders still apply with respect to cold weather working.

The substrate must not be frozen and material should not be applied if there is a risk of frost within 24 hours.

The minimum application temperature is 5°C for all Monocouche renders.

Replace correct proportion of Monocouche mixing water with the weber accelerateur monocouche solution. Dosages are given in the application section.

Mix product in accordance with standard product recommendations using the modified gauging water.

If using an electric continuous mixer pump the feed water connected to the render pump must be modified to the correct dosage using a water butt feed.


weber accelerateur monocouche must be added to the gauging water for the Monocouche prior to adding the powder to ensure full dispersion.

The correct dosage per 25 kg bag of Monocouche is 0.1 litres of weber accelerateur monocouche. Mix addition thoroughly into gauging water before adding powder. The total modified water mix must not exceed the allowable water content for the product used.

When using a discontinuous mixer pump (such as a Putzmeister P11) the dosage per 6 bag mix is 0.6 litres of weber accelerateur monocouche replacing the same proportion of gauging water.

When using a continuous mixer pump such as an M-tec Duomix every 10 litres of gauging water must include 0.2 litres of weber accelerateur monocouche.



The usage of the Monocouche product remains the same. Refer to the appropriate product instructions.


weber accelerateur monocouche solution will accelerate the initial set time such that, at 5°C working temperature, the scrape time of a Monocouche product will be the same as that during the summer months (20°C).

Please note that the temperature of the mix may be different than that of the ambient temperature due to the water supply/ powder temperature. Due to this fact the setting period is only an given as an indication.


Packaging, Health & Safety


weber accelerateur monocouche is supplied in 20 litre plastic containers weighing 29 kg each.  A pallet of weber accelerateur monocouche consists of 32 containers with a total weight of 928 kg.

Coverage / Yield

0.1 litres of product per 25 kg bag of Monocouche.

Storage and Shelf Life

When stored airtight in a dry place at temperatures between 5°C and 30°C, shelf life is 12 months from date of manufacture. Protect from frost and heat.

Health and Safety

Contains calcium nitrate tetrahydrate (CAS No. 13477-34-4) and calcium chloride (CAS No. 10043-52-4)

Irritating to eyes.
Avoid contact with eyes and skin. In case of contact with eyes, rinse immediately with plenty of water and seek medical attention.

Wear suitable gloves and eye/ face protection.

In case of ingestion, seek medical attention immediately and show label.

Keep out of reach of children.

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