Small construction sites and large retail chains offer the consumer a huge selection of mixtures for various purposes. The leading position in terms of popularity is occupied by the products of the famous German concern Henkel, which is produced under the Ceresit brand. On the shelves of construction stores you can see various adhesives of this brand, leveling mixtures, primers, grouts for ceramic tiles and many other products.
We will focus on the waterproofing composition produced by this manufacturer under the marking Ceresit CR-65. In this article, we will find out what characteristics this product is endowed with, what properties it has, how to use it correctly, where the mixture (waterproofing) CR-65 can be used.
Scope of application
Judging by consumer reviews, the Ceresit mixture is intended forcarrying out waterproofing works on non-deformable concrete bases. The composition can be applied to any surface (ceiling, walls, floor) in order to create a waterproof coating. At the same time, it can be used both indoors and outdoors. The main task of such insulation is to prevent the occurrence of dampness and the penetration of moisture into buildings. Customer reviews indicate that the Ceresit CR-65 waterproofing mixture is most often used:
- For waterproofing concrete and brick surfaces.
- Applying a protective layer inside and outside basements and underground facilities.
- Creating waterproofing in rooms with a high level of humidity: kitchens, toilets, industrial premises.
- For waterproofing monolithic pools, bathtubs, water storage tanks.
- As a protective layer to prevent the destruction of underground tunnels and hydraulic structures from water and frost.
- To protect the foundation of buildings.
Basic Features
Dry mix (waterproofing) consists of Portland cement, polymer with mineral additives and various modifiers. The product is sold in the form of a dry composition, packed in 25 kg bags. Judging by the feedback from consumers, in the hardened state, the coating has the following properties:
- excellent vapor permeability;
- low temperature resistance;
- environmentally friendly;
- water resistant;
- strength;
- no shrinkage;
- hydrophobicity;
- resistance to s alt and alkali.
Liquid composition perfectly droops into the cracks, depressions and pores of the surface, resulting in a reliable coating that prevents the penetration of even the smallest particles of water.
Ceresit CR-65 Waterproofing Compound: Specifications
Now let's look at the technical characteristics of this product. The information from the manufacturer, located on the product packaging, says the following:
- To prepare a working composition for 25 kg of dry mix, you will need 6.5-7 liters of liquid. If the application of the mass will be carried out with a spatula, the amount of water should be reduced to 5.5 liters.
- The prepared mixture is usable for the first two hours.
- Perform work on applying a waterproofing layer should be at a temperature of +5 to +30 degrees.
- Humidity in the room at the time of surface treatment should be no more than 60%.
- Adhesion of the composition with the surface - 1.0 MPa.
- Compressive strength after two days - 10.0 MPa, and after 28 days - 15.0 MPa.
- Hardened composition easily tolerates more than 100 freezing cycles.
- Treated surfaces can be used at temperatures from -50 to +70 degrees.
Three days after applying the composition, installation of ceramic tiles can begin. Endurancethe coating acquires hydraulic loads 5 days after application.
Before you go to the store for a purchase, every master will want to understand how cost-effective Ceresit CR-65 waterproofing mixture is. Material consumption in these calculations plays a very important role. The manufacturer informs us that for the treatment of each square of the surface we need from 3 to 8 kg of dry mix. This figure varies depending on the thickness of the protective layer and the number of treatments.
Preparing the base for processing
Before proceeding with the application of the finished solution, it is necessary to thoroughly prepare the surface. It should be sufficiently dense, even and durable. Before processing, it is cleaned of various contaminants and dust-free. Falling off plaster, paint and all kinds of delamination must be removed. All cracks and depressions are embroidered and smeared with special compounds.
A cleaned and even base is abundantly spilled with water, preventing its accumulation and the formation of streaks. After that, you can apply the mixture. Waterproofing products of this brand can be used together with Ceresit CO-81 water repellent, which improves the performance of the first material several times.
How to prepare a working solution?
In order to avoid mistakes during work, you need to know how to properly prepare the Ceresit waterproofing mixture. Reviewsconsumers and the manufacturer say that a strictly measured amount of water with a temperature of +15 to +25 degrees should be taken to mix the solution. Both components are combined and mixed with a low speed mixer until lumps disappear. After the first kneading, the mixture is left for 5 minutes, after which it is kneaded again.
Applying the mixture
Those who have not yet encountered this product are probably interested in how difficult the liquid waterproofing mixture (Ceresit CR-65/25) is to work. Consumer feedback suggests that there is nothing difficult in this process. Anyone can do this kind of work. In addition, consumers mention the quality of this material. Judging by their reviews, it will last a long time without causing trouble.
Waterproofing "Ceresit" is applied in at least 2 layers. During the first pass, a muffler is used. All subsequent layers are applied with a spatula or brush in cross directions on a frozen (but not dry) first layer. As a result, the entire treated surface should have a coating of the same thickness. The operation of the coating can be started after 5 days.
