Silotherm ep-71, flame retardant neutral silicone sealant, cartridge 0.4 kg

Advantages and disadvantages

Fireproof sealants have a number of advantages that distinguish them favorably from materials with a similar purpose:

• resistance to high-temperature action, no burnouts (for a range of media);
• high degree of adhesion to most building and finishing materials;
• the absence of hazardous substances in the composition, the release of toxins when heated;
• dielectric properties;
• no deformation, cracking due to elasticity;
• the ability to withstand vibration, UV radiation, radiation exposure, the influence of moisture, detergents, microbial activity;
• long period of operation (up to 40 years);
• availability of convenient forms and various volumes for sale.

The disadvantages include the increased cost of such products compared to conventional sealants, but this pays off with a lot of advantages.

Organosilicon sealants

The basis of polyorganosiloxane (organosilicon) sealants is liquid organosilicon rubbers (molecular weight 20,000-100,000) of linear structure, containing side alkyl or aryl and terminal hydroxyl groups.

Mostly polydimethylsiloxanes and polymethylphenylsiloxanes have been used industrially.

Composition of organosilicon sealants:

• silicone rubber,
• mineral fillers (highly dispersed SiO₂, TiO₂, ZnO, etc.),
• curing agents - monomeric or polymeric polyfunctional organosilicon compounds (for example, orthosilicic acid esters, alkyltriacetoxysilanes).

A typical silicone sealant contains (in parts by weight):

• rubber - 100,
• SiO₂ (grades U-333-30,
• methyltriacetoxysilane - 6.

Vulcanization of organosilicon sealants

Vulcanization proceeds vigorously at room temperature. The reaction mechanism consists in the interaction of the terminal hydroxyl groups of polyorganosiloxanes with the functional groups of curing agents. As a result of vulcanization, compositions having the consistency of pastes or viscous liquids turn into a rubbery material. Depending on the nature of the vulcanizing agent, this reaction takes place in the presence of catalysts or under the influence of moisture in the air. Catalysts (organotin compounds, some amines) are usually used in combination with orthosilicic acid esters.

The sealing paste and the catalyst are stored separately (the latter is in a sealed container) and mixed before use (two-component silicone sealants). The pot life of such organosilicon sealants is 1-6 hours, the duration of their vulcanization at room temperature is 12-48 hours. In the presence of alkyltriacetoxysilanes, the sealants cure when exposed to moisture in the air. Such sealants, containing all the necessary ingredients (one-component silicon-edge sealants), are stored in sealed tubes. The duration of vulcanization after extrusion of the sealant from the tube depends on the thickness of the applied layer (for example, with a layer thickness of 3 mm, it is 24 hours).

Characteristics of vulcanized silicone sealants:

• satisfactory physical and mechanical properties,
• high weather resistance,
• moisture resistance,
• low corrosiveness towards metals,
• unstable to the action of fuel oil,
• designed for operation in air at temperatures from -70 to 300 ° C.
• for their attachment to metal and other surfaces, special subcoats are used (for example, P-11, P-12E, primers SS-4004, SS-4056).

A special group of sealants based on liquid polyorganosiloxanes are compositions containing foaming agents. At room temperature, as a result of the simultaneous foaming and vulcanization processes, a rubber-like porous material (density 0.4-0.7 g / cm 3) is formed from such sealing compounds, mainly with closed pores.

Characteristics of foam sealants based on liquid polyorganosiloxanes:

• good dielectric properties,
• water absorption within 0.8-1.3% (30 days at room temperature),
• brittleness temperature is about -76 ° С,
• dielectric properties:
  1. Dielectric loss tangent - 0.0 01 - 0.0 4
  2. Specific volumetric electrical resistance Hom m (ohm cm) - 20-45000 (2 * 10 12 -4, 5 * 10 15)
  3. Specific surface electrical resistance, Volume (ohm) - 40 - 1500 (4 * 10 13 -1, 5 * 10 15)

Popular manufacturers

Of course, today a very large number of companies and brands are represented on the market that are engaged in the production of silicone sealant. To simplify the selection and save time, we present the most popular ones. Some of them have a narrower application, such as, for example, a fire retardant sealant.

The most common brands:

• Loctite;
• "Silotherm";
• "Moment";
• Ceresit;
• Ciki-Fix.

Loctite

One of the most trusted manufacturers supplying high quality products is Loctite. The sealants of this company are of true German quality, since it itself is a division of the Henkel Group. The product of this manufacturer is widely used in various industries.

Elox-Prom

A worthy representative of Russia in the market of protective coatings is products that are manufactured under the brand name "Silotherm". The main names of the products of this company are "Silotherm" EP 120 and EP 71, these are high-temperature sealants. That is why the main areas of use are: fire-resistant insulation or sealing of cables at the entrance to junction boxes. Delivery of sealant from this manufacturer is possible both in buckets and disposable tubes.

The range of the company:

• silicone fire retardant materials;
• silicone heat-conducting and dielectric materials;
• sealed cable penetrations and more.

"Moment"

Moment is a Russian brand. It is owned by the same German concern Henkel Group. On the territory of the Russian Federation, production is represented by a household chemicals plant (Leningrad region). The main products are glue and sealant. The company's products are supplied in 85 ml tubes and 300 ml and 280 ml cartridges.

The assortment of this brand:

• contact adhesive;
• glue for wood;
• polyurethane foam;
• wallpaper glue;

• adhesive tapes;
• stationery glue;
• Super glue;
• tile products;
• epoxy adhesive;
• sealants;
• assembly glue;
• alkaline batteries.

Moment sealants:

• seam restorer;
• silicone universal;
• sanitary;
• for windows and glass;
• neutral universal;
• neutral general construction;
• for aquariums;
• for mirrors;
• silicotek - protection against mold for 5 years;
• high temperature;
• bituminous;
• frost-resistant.

Ceresit

The next representative of the Henkel Group is Ceresit. The company that created this brand was founded in 1906 under the name Dattelner Bitumenwerke. And already in 1908 she produced the first sealant of this brand. Almost 80 years later, Henkel bought the brand. The company's product range includes materials for cladding, flooring, paint, waterproofing, sealing, etc.

Range of sealants:

• universal polyurethane;
• acrylic;
• sanitary silicone;
• universal silicone;
• glass sealant;
• elastic sealant;
• heat resistant;
• highly elastic;
• bituminous.

Packaging - 280 ml or 300 ml.

Ciki-Fix

The most economical solution in terms of price is the Ciki-Fix sealant. Application - various minor construction and repair work. The area of ​​use is external and internal work. The colors are white and transparent. The quality meets European standards. Packaging - 280 ml cartridge.

Features of choice

In order to accurately choose a product, it is necessary to understand exactly where this material will be used, as well as what properties, basic or additional, it should have.

The main factors for the correct determination of the characteristics that form the final result - a successful purchase:

you need to determine the color scheme - for sealing joints in the flooring, you can use dark colors, for example, gray;
special attention should be paid to the fact that it is better to use a fire-resistant sealant ("Silotherm") for seams of surfaces with an increased risk of fire;
if renovation is planned in the bathroom, the white color of the seal is ideal for this. In such rooms, due to humidity, fungus often multiplies, which causes mold to appear in the joints of the shower stall or other seams - use a sanitary type of product.

Mode of application

For high-quality adhesion of the glue to the material, the surface should be prepared for work. It is necessary to remove dust and various contaminants, degrease the joints, cracks and other places intended for grouting with a special compound. The sealant is produced in tubes of 300 or 600 ml. For work, you need a plunger construction gun, into which a tube with a cut off top and a dispenser is inserted.

The prepared, dried joints or seams are filled with silicone, the excess should be removed with a damp cloth. If the glue mass is still frozen in the wrong place, it can be removed with a solvent. The appearance of the film occurs quite quickly, but the full drying of the working surface occurs in a day. Drying time depends on the thickness of the applied silicone layer.

In the next video, you will find instructions on how to use Penosil General Silicone neutral silicone sealant.

Silotherm EP-71

One-component silicone heat-resistant sealant

One-component silicone fire-resistant neutral sealant Silotherm EP-71 is a material based on a silicone elastomer with increased reliability.

Silotherm EP-71 is a more advanced analogue of the Iceberg 701 fire-resistant sealant.

The initial consistency of the sealant is thixotropic, which makes it possible to use the fire-resistant sealant Silotherm EP-71 on vertical surfaces. The use of sealant Silotherm EP-71 can be carried out both manually and with the help of specialized pneumatic pistols.

Sealant Silotherm EP-71 is repairable, which provides for the possibility of restoration in case of mechanical and other damage.

Silotherm EP-71 neutral fire retardant sealant photo.

Application

One-component silicone fire-resistant neutral sealant Silotherm EP-71 is an effective barrier against water, smoke, gas, pressure and fire.

Sealant Silotherm EP-71 is manufactured in three standard versions:

performed by Silotherm EP-71 (trade mark S-200K) used for: - Sealing and sealing joints in building structures; execution of universal cable penetrations of passive fire protection systems SPO-E; - Sealing of cable products (sealing of cable terminations EK, EU couplings, EA connecting systems) - Cable termination, connecting and transition couplings EK and EC; local sealing of various types of cavities, joints, expansion joints with a given fire resistance limit; - Fire-, smoke-, water-proof cable seals in pipes of small diameter and cable entries into junction boxes; - Fire-resistant sealing, sealing and fixing of doors and glass units.

performed by SILOTERM EP-71M it is used for: - Execution of fire-resistant electrical insulating coatings, as well as anti-corrosion coatings of construction materials and assemblies;

performed by SILOTERM EP-71 kNS used for: - For bonding dissimilar materials where an elastic flame retardant connection is required.

Silotherm EP-71 meets the requirements:

• TU 2257 - 003 - 33680530 - 2003 “Silicone fire-resistant neutral sealant Silotherm EP-71”;
• “Special conditions for the supply of equipment, instruments, materials and products for nuclear power facilities”;
• NPB 237-97 * “Building structures. Test methods for fire resistance of cable penetrations and sealed cable glands ”;
• SNiP 21-01-97 * “Fire safety of buildings and structures”.

Main technical characteristics of Silotherm EP-71

Note: * the parameter can be changed at the suggestion of the Customer.

Special technical characteristics of the compound Silotherm EP-71

One-component silicone fire-resistant neutral sealant Silotherm EP-71 has a number of unique properties:

• Moisture resistance - the sealant can be used in conditions of 100% humidity;
• Radiation resistance - permissible integral dose of radiation - 1.25x10 8 Rad;
• The formation of a vulcanite crust in a fire or the effect of coking, in which the outer side of the sealant, which is affected by the fire, turns into a durable vulcanite composition that prevents the passage of smoke and fire;
• The effect of auto-sealing in case of a fire, in which, due to the special properties of the sealant Silotherm EP-71, the partition or assembly seam retains its integrity during the entire time of exposure to the fire;
• Qualification for special operating conditions at nuclear power plants;
• High electrical insulating properties;
• Explosion proof.

Production and supply of sealant Silotherm EP-71

The entire production cycle of Seloterma EP-71 sealant, such as: order preparation, supply of components, incoming control, technological preparation, production, is carried out according to the ISO-9001 quality assurance system.

Sealant Silotherm EP-71 is supplied in cartridges or folium tubes. The guaranteed shelf life of the material is 12 months from the date of manufacture.

All necessary certificates are available.

Appointment

As noted earlier, this material is used to perform work on the insulation of seams or joints. Work using this product can be done both indoors and outdoors. It is used for household and industrial purposes, for example, the Loctite brand, whose products we will consider below.

The main areas of application are as follows:

• sealing the joints of window frames both inside and outside the room;
• sealing the seams of drainpipes;
• used for roofing;
• filling joints on furniture and window sills;
• installation of mirrors;
• plumbing installation;
• sealing the junction of the bath and sinks to the walls.

What is it?

The composition of the silicone resembles a viscous, soft and elastic structure, which, when solidified, seals cracks, cracks and seams. Solid components such as sand, quartz and silicon are involved in the creation of a sealant, this gives strength and reliability to the treated surface.

One-part silicone sealants are available in alkaline, acidic and neutral types. Amines dominate in alkaline formulations. Acetic acid forms the basis of acidic products.In neutral sealants, the content of alcohol or ketoxime allows you to work with any surfaces, which cannot be said about alkaline and acidic products, the components of which are incompatible with marble, cement, plaster, non-ferrous metals and some types of plastics.

Requirements for fire retardant sealing of seams

Any fireproof sealant is manufactured in accordance with existing state standards, specifications, norms and other documents regulating production. Each product must receive a certificate of conformity, which is awarded after passing tests for resistance to heat, fire, etc.

The list of requirements for fire-resistant sealants is specified in the PPB JV "Fire protection", and additions to them are reflected in Art. 87, 88 FZ No. 123. The main requirement for water and gas tight fire retardant sealants is considered to be the ability to localize the flame, limit the spread of fire, and preserve the integrity of firewalls. As stated in the regulatory documents, fireproof sealants are used for fire protection purposes. Here are the main ones:

Views

Neutral silicone sealants are marketed by a variety of manufacturers. They are classified by composition, purpose, color palette. The choice depends on the place and purpose of the application. The purpose of the composition is indicated on the package. In most cases, sealants are divided into construction, automotive and special. They are produced for indoor, outdoor, wet or dry rooms.

There are several types of silicone sealants for their intended purpose.

Plumbing and sanitary. This type of product is equipped with antifungal additives, they repel water well, therefore they are used in rooms with high humidity: bathroom, swimming pool, kitchen, bathroom. The joints of pipes and sanitary equipment are treated with sanitary silicone. It has a high degree of adhesion, tolerates aggressive detergents well, and withstands high temperature conditions.

• Automotive. Used to replace car gaskets. Silicone repels water, engine oil, but contact with gasoline is not recommended. The sealant can withstand temperatures up to +300 degrees, is strong and durable.
• Roofing. This type of sealant has enhanced adhesion to bricks, wood, bitumen, metals, plastics, ceramics and concrete. It is irreplaceable in the processing of tile joints, for sealing chimneys, roof windows and other roofing works. It tolerates any climatic conditions well.
• Construction. Neutral silicone sealant is used for all kinds of construction and repair work indoors and outdoors. It has good adhesion to plaster, metals, plastics and so on. UV resistant, will not age or discolor.

• For work with bricks and stones. These products are designed for outdoor use, are well resistant to weather conditions, tolerate temperature fluctuations, and include fungicides that stop the development of fungal formations. Has good adhesion to porous surfaces, used for grouting, joining stone, plastic, glass.
• Aquariums. The glue-sealant for glass does not contain harmful impurities and is non-toxic. Has good adhesion to glass and other smooth surfaces. Used for gluing the walls of florariums, aquariums, terrariums, vases and glossy showcases.

These are not all types of work where silicone sealant is used. In everyday life, there is always a use of a miracle glue that can "bind" any surface.

Application area of ​​fire resistant sealants

Initially, fire-fighting compounds were made on the basis of clay and cement and were used for various construction work. Nowadays, modern refractory sealants are produced with the addition of various synthetic substances, polymers, and the scope of their use has expanded significantly. They are suitable for:

• air ducts;
• fireproof windows, doors;
• pipeline networks;
• ventilation boxes;
• vehicle engines;
• heat generating units;
• electric lines;
• wire entries into equipment cases, junction boxes.

The most heat-resistant sealants ensure tightness of joints in aggressive conditions of long high-temperature exposure. They are also able to withstand extremely high temperatures and contact with undiluted acids for a short time.

Heat-resistant sealant "Silotherm EP-71"

This sealant is formulated with a tough silicone elastomer. It is used for sealing seams, joints on building structures, arranging fire protection systems, sealing cables, connecting and transition couplings, installing double-glazed windows.

A kind of sealant "Silotherm EP-71M" is used to create fire-resistant electrical insulating coatings, to perform anti-corrosion protection. The version of "Silotherm EP-71 kNS" has increased elasticity, therefore it is suitable for highly deformable joints. All remedies are different:

• radiation resistance;
• moisture resistance;
• the ability to coke under the influence of fire;
• explosion safety;
• frost resistance;
• the ability to electrical insulation.