Your Cart

Ceresit ZU Insulation and Fibreglass Mesh Adhesive ǀ Base Coat Render ǀ 25kg

Ceresit ZU Insulation and Fibreglass Mesh Adhesive (Base Coat Render) - 25kg
Ceresit ZU Insulation and Fibreglass Mesh Adhesive ǀ Base Coat Render ǀ 25kg
  • Assumed consumption: Reinforced layer: approx. 4.0 kg/m2
  • Assumed consumption: Fixing boards: approx. 5.0 kg/m2
  • Approximate coverage per one bag - 4-6m2
  • Temperature of application: from +5 °C to +25 °C
  • Mixing ratio: 4.5÷5.0 l of water per 25 kg
Estimated delivery:
In Stock
£ 23.94
Ex VAT: £ 19.95
  • Brand: Ceresit®
  • Model: ZU EWI
  • Weight: 25.00kg
  • SKU: ZU
  • Product code: P1-406
  • MPN: Ceresit ZU Base-Coat and Adhesive

Options available

Ceresit ZU Adhesive and Reinforcing Mortar (25kg Base Coat Render) is a two-in-one product designed to secure polystyrene boards and fiberglass mesh within a complex system of external walls insulation

ZU is flexible and durable powder, used for fixing expanded polystyrene (EPS) boards and for making a reinforced protective layer.

ZU should be poured into the measured amount of cool clean water and stirred with the drill by means of a mixer until the homogenous mass is obtained without lumps.

Mixed mortar should be applied 2mm to 3mm layer on EPS boards using smooth, steel trowel.

Faster or slower setting of the mortar may occur in different weather conditions. 

For mesh reinforcing protective layer 10cm overlaps should be kept to avoid cracking.

The properly applied ZU mortar when pressed should cover minimum 40% of the boards.

Protection of scaffolding during application is recommended.

The applied layer should be protected from rain.


1. Fixing EPS (Expanded Polystyrene) boards

The ready mortar should be applied with a trowel along the board edges forming a strip of 3÷4 cm wide and a few spots with the diameter of approx. 8 cm. 

Then immediately, the board should be pressed to the wall with a few slight blows of a long float. 

The properly applied mortar when pressed should cover minimum 40% of its surface. 

In case of even, smooth substrates the mortar should be applied by means of a toothed long float (teeth 10mm - 12 mm).

The boards should be fixed tightly one at the other in one surface with the preservation of ”brick like manner” of vertical connection.


2. Preparing the reinforced layer 

Prepared mortar should be applied 2-3 mm layer on EPS-boards using smooth, steel trowel.

On fresh layer glass fibre net should be set (10 cm overlaps should be kept). 

Then the next layer can be applied (thickness 1 mm) and smoothed in order to net wasn’t visible.

Fresh stains should be cleaned with water while hardened elements should be mechanically removed only.


Key Points:

 · Flexible

 · Durable

 · 2 in 1 product

 · Good adhesion

 · Resistant to weather conditions


Assumed consumption:

 · Fixing boards: approx. 5.0 kg/m2

 · Reinforced layer: approx. 4.0 kg/m2

 · Approx. coverage 4-6m2 per bag



During preparing the reinforced layer work on sunny walls is inadvisable. 

Application should be performed in dry conditions with the substrate and ambient temperature from +5°C to +25°C. 

All the data refer to the temperature of +20°C and relative air humidity of 60%.

ZU powder mortar shows irritated properties and cement and lime content causes alkali reaction when mixed with water.

Therefore skin and eyes should be protected. In case of contact with eyes, they should be rinsed with water and the general practitioner should be consulted.


*Further information may be found in our Downloads section.

Fairly easy access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet


non returnable bagged product.

Board covarage 5.00 m2
Colour Grey
Consistancy Powder
Material Cement based - Mortar
Shelf Life 12 months
Application Temperature from +5 °C to +25 °C
Shipping method Rigid Vehicle ǀ Courier
Applications External Wall Insulation
ETA Notification Yes
Features Flexible and durable powder
Manufacturer Henkel Ceresit®

Write a review

Note: HTML is not translated!
Bad Good

We deliver insulation materials to Mainland UK only. Deliveries to Highlands, Northern Ireland, Isle of Wight etc.. might be possible at additional cost.
We offer free delivery on most of the orders above £300 (excluding VAT) (except special products - shipping cost via courier - products marked ''Request A Quote'')

Delivery of some insulation materials might be extended due to the current situation (Covid-19, stock shortages, allocations).
If you need materials quickly please contact us - we will do our best to help you source materials needed.

We do not deliver on weekends and bank holidays. Sometimes we can deliver on Saturdays - please check with us before placing the order.
If you need any further information please contact us tel. 02081910776

We can help to calculate price per m2 or linear meter (one meter in length) cost, please just contact us via phone 02081910776, email or live chat. Alternatively, you can work it out yourself quickly and easily: to get cost per meter square please divide price shown in orange area by ''Required area (m2)'' Example price of £28.80 divided by board coverage 2.88m2 = cost of £10.00 per m2.


No matter whether you choose a local installer or a national company, there’s a few tips to help you find the right installer for your home insulation improvements, such as asking for recommendations and making sure that they’re part of a certification scheme. This makes sure that they have the right skills and standards of workmanship to carry out the installation, and you can be sure that they know exactly what they are doing.


1. Thermal inspection picture in portfolio

It’s worth seeing a installer’s previous work. There’s no harm asking if you can see any properties nearby that they’ve installed insulation in. Best way would be to see Infrared Thermal Imaging Inspections. Thermal cameras spot small, but key changes in temperature in different areas of a house, identifying problematic areas that the human eye never could and some that a visual inspection could only hypothesize.

2. Reviews

Along with checking recommendations and previous work, finding reviews online can often be a great way to find out if they provide a good service or not. However, it’s best not to solely rely on reviews you may find or review websites, as there’s no controlling who writes them.

3. Compare prices

Comparing prices will also ensure companies can’t take advantage of you and give you a fair price. 

4. Word of Mouth

The best way to find a great insulation installer is through recommendations. Make sure you ask friends and family. They will most likely give you their honest opinion and can tell you from first hand experience.


Whether you require a wall, cladding, external wall, loft or floor insulation fitted, you can find and hire your local insulation installers from popular UK web pages. A simple internet search will return thousands of potential installers near your area.



We are the stockist of construction materials and related products for both trade and DIY from most recognizable brands in the UK like Cordek, RCM, Promat, Rockwool, Isover, Celotex, Xtratherm, Ursa, Low-E, Cedral, Kingspan, Dufaylite, British Gypsum, K-rend, Ecotherm, Iko enertherm, Kay-Metzeler, Terrawool to allow you to complete your insulation job on time at competitive prices and the highest standards.


Whether you are a large company or a DIYer, if you need a large amount of insulation materials, we can offer quantity discounts at the best prices. Please contact us and our friendly customer service will try to find the best and cheapest solutions for you. We value your time and we will try to deliver the products as soon as possible at a reasonable price to your construction site or house. The UK's leading insulation supplier near you and your needs. Price List available upon request.
Ceresit ZU Insulation and Fibreglass Mesh Adhesive (Base Coat Render) - 25kg
Ceresit ZU Insulation and Fibreglass Mesh Adhesive ǀ Base Coat Render ǀ 25kg
£ 23.94