• 26/04/2022
• Categories: Coating materials

Bitumen mastic for waterproofing of roofs with their hands

Roofing mastic allows to build the roof without the roll material, thereby reducing the turnaround time without sacrificing quality. The main advantage of mastic coating prior to roll — no seams.

Where the use of mastic:

• the construction of a new mastic roofs;
• roof repair: smoothing concrete or cement screed, the elimination of potholes with a depth not greater than 5 mm, on roll roofing;
• waterproofing in the construction of pools and fountains, laying tiles;
• corrosion protection of metal structures;
• the gluing roll materials for roofing;
• waterproofing at joints of roofing parapets, chimney, ventilation, drainage funnels.

Mastic is applicable for all types of roofs: slate, tile, metal, pitched, rolled, concrete and other.

Types of mastic ↑

The mastic is prepared by combining binder of organic substances, mineral fillers and processing AIDS. Upon drying the sealant forms an elastic waterproof film.

By way of mastic are of two types:

• cold — do not require special preparation at a temperature above +5° C, you only need to stir;
  if the temperature is lower, the mastic is heated to 60-70° C;
• hot — preheated to the desired temperature.

Both have good moisture resistance and adhesive properties. Some mastic prevent the occurrence of mold and mildew. Often used cold substance, the hot used mainly for gluing of rolled materials based on bitumen.

Types of mastic differ in the type of binder:

• bitumen;
• tarry;
• bitumen based;
• bitumen-polymer.

Good popular bitumen-polymer and bitumen-latex mastic.

Bitumen-polymer has high strength and flexibility, prevents the development of mold and mildew.

The composition of the essential for to seal the seams between the strips of roll material and joints of roofing with a perpendicular passing by the pipes. During solidification the composition of the film is formed without joints and seams that retain integrity even when the deformation of the roof. Easy to apply like paint.

The bitumen-latex mastic — two-component composition obtained by mixing the bitumen and latex emulsion prior to application.

The advantages of this type:

• the material has a fine structure, so spreads itself evenly over the surface, penetrates all the hard to reach places;
• latex gives the composition an enviable elasticity — can be stretched 5 times;
• coating the surface of any shape, even without prior training;
• high adhesion and heat resistance of the coating;
• you can add pigment to vary the colour of the roof.

The disadvantages include the possibility to crack and break under deformation at low temperatures, so it is best not to put mechanical stress on the cold.

In asphalt mastic is asbestos or its derivatives, fine brick, quartz or limestone powder. Also the filler is a reinforcing material in the mastic, ensuring its strength under deformation.

Bitumen roofing mastic is used for gluing roofing felt or pergamina, tarry — for by roofing material.

The purpose of the mastic are divided into several types:

• adhesive for roofing and waterproofing;
• used for the device mastic roofing;
• waterproofing-asphalt — used for vapor barrier;
• to protect the layer from corrosion folgoizol

In the cold as there are materials:

• hardening;
• the remaining soft.

According to the method of dilution roofing mastic are divided into three types:

• razmeshivatsya with water;
• with organic solvents;
• with solvent-containing liquid organic substances.

The consistency of the materials are:

• single component;
• two-component.

Single-component mastic is a ready-based composition of the solvent, the evaporation of volatile substances which triggers curing. Capacity in which such compositions are sold, must be sealed to prevent premature curing of the mastic.

This does not apply polyurethane mastic that hardens upon contact with water vapor present in the air. Cured polyurethane compositions retain the same size. Mastic is retained throughout the year after opening with proper sealing of closed containers.

Two-component mastics are composed of two substances are mixed before the beginning of the application. Each component separately can be stored for up to a year.

All materials of the construction value must meet quality standards:

1. The absence of large filler particles.
2. Weight should be homogeneous.
3. The content of harmful substances is regulated.
4. Should be easy to use and easily applied to the surface of.
5. Heat resistance — no lower than +70° C.
6. The bitumen-latex mastic roofing waterproof and resistant to microorganisms.
7. Glued part of the rolled material must adhere to.
8. The lifetime of the material is not less than the stated.
9. Quality mastic, though dense, but lighter than water. The number of weight the sold containers of material should not exceed the value, otherwise it is counterfeit.

Bitumen mastic for waterproofing of roofs with his own hands ^ a

Relatively good material for waterproofing can be made independently, which also saves finances.

For the preparation of pastes with your hands you will need:

• pieces of bitumen;
• some bricks and metal Chan;
• combustible material for a bonfire.

Cooking instructions ↑

Of bricks going vertical an improvised oven in the center of which kindled a fire. On top put a metal pan in it are placed the pieces of the bitumen, previously chopped into small pieces. Bitumen is melted in the liquid mass, from which the boiling process will evaporate the excess fluid. During cooking a lot of stir with a wooden stick, spotted pieces of debris to catch. If you stopped to make foam, then excess liquid has evaporated and the bitumen is ready.

A VAT mass is removed from the heat and you can cook paste. The full cooking time — 3 hours.

The decrease in the intensity of foaming the bitumen slowly added to the plasticizer, the composition is mixed. To increase the density of the mastic it is added to the cement. Cooking temperature is not higher than 190° C. If bubbles appear yellow or green shades, the capacity to remove from heat.

Liquid bitumen is poured into another metal container, thoroughly mixed with a liquid solvent-based gasoline or kerosene in equal proportions in the following order:

1. A container of solvent already prepared.
2. In the solvent in small portions with a bucket filled with bitumen, weight of intensively mixes until smooth. Prepares mastic or primer.

For storage, the composition is poured into plastic containers without filler.

The process of preparation of bitumen mastic it is possible to look at the video:

Roofing mastic for cold application ↑

Key benefits:

• the finished mixture, which only need to stir;
• requires no special equipment and skills for the application;
• the level of harmful fumes in the air are much lower than from the hot mastic.

The device and repair of the roof: ↑

• The surface is cleaned of dust, dirt, buildup of ice, the cracks and potholes are sealed remotename;
• processed bituminous primer;
• the composition applied in a thin layer with a stiff brush, roller brush, putty knife or filling, leveled rule;
• horizontal roof requires more layers of material on a pitched roof the water is less, so the number of layers can be reduced;
• at the joints of the cover with ventilation pipes, flue, drainage and in places of the greatest accumulations of water, it is recommended to reinforce waterproofing with reinforcement of fiberglass or glass fiber;
• to fill the blistering on the soft roof they are cut crosswise, the cavity is cleaned, dried and filled with mastic, after which the cut edges are joined and also smeared composition;
• the last layer, spread gravel or sand to protect against overheating;
• for roof coating roofing sealant provides a solid adhesive material such as hot and cold.

Specifications cold formulations some manufacturers ↑

Bitumat ↑

The material is designed for sealing cracks and seams in roof coating, sealing abutting joints, gluing roll material, vapor barrier roofing systems. Contains a herbicide that prevents the appearance of plants, mosses and lichens on the roof. Without toluene and other toxic substances.

Features:

1. the drying of the layer to 24 hours;
2. non-volatile substances — 55 %;
3. the softening temperature of the solids — 90° C;
4. adhesion:
5. concrete — 0.2 MPa;
6. with metal — 0.2 MPa;
7. vybiranie water in tech. 24 p — 0.4 %;
8. no cracks on the corner of a radius of curvature of 5 mm at temperatures of up to -5° C;
9. water resistant in tech. 72 hours at a pressure of 0.001 MPa;
10. consumption — 0.5 l/m^Two;
11. the layer thickness — 0.5 mm.

Mastic emulsion TECHNONICOL 33 ↑

Water-based bituminous product, modified latex and polymer additives, without organic solvents.

Purpose:

• installation of mastic roofs;
• waterproofing deepen in the ground or in contact with moisture structures;
• internal waterproofing of the premises.

Specifications:

1. adhesion to concrete — 0.6 MPa;
2. conventional strength — 0,7 MPa;
3. the relative stretch at break of 900 %;
4. water absorption in tech. 24 p — 0.4 %;
5. the proportion by mass of the binder substance with the emulsifier — 53-65 %;
6. maximum withstanding temperature in tech. 5 hours — 140° C;
7. no cracks when bending on the corners rounding radius of 5 mm at -25° C;
8. waterproof in tech. 24 h under a pressure of 0.1 MPa;
9. curing time — 24 to 72 hours;
10. maximum durability — 3-7 days.

Roofing mastic hot application ↑

The main advantage of hot mastic is fast curing. Roll materials bonded with such a composition, are securely held after a few minutes.

Hot mastic is pre-heated to 160-180° C, is applied with a spatula, brush or filling, spread with rule.

Characteristics of hot mastic some manufacturers ↑

TekhnoNikol № 41(Eureka) ↑

Bitumen-polymer mastic for repair, and waterproofing of the roof. Comes in a solid form.

Features:

1. softening temperature — 105° C;
2. the strength of the gluing roll material with concrete and metal is 0.15 MPa;
3. adhesion at the temperature of +20° C:
4. concrete — 0.2 MPa;
5. with metal — 0,25 MPa;
6. adhesion at -20° C:
7. concrete — 0.8 MPa;
8. with metal — 1 MPa;
9. the strength of displacement of the gluing — 4 kN/m;
10. water absorption in tech. 24 h — 1 %;
11. conventional strength — 0.2 MPa;
12. the relative stretch at break of 1100 %;

MBK-G ↑

The mastic is intended for gluing of roll material, sealing of potholes and cracks in the roof to a depth of 5 mm and obmazochnoy waterproofing.

Comes in blocks in the form of solid pieces of oxidized bitumen. Before applying melted and cooked at a temperature of 160-180° C with constant stirring. Applied to the cleaned treated primer surface.

Features:

1. Package weight — 20-40 kg;
2. softening temperature — 85° C;
3. adhesion to concrete and metal — 0.1 MPa;
4. strength displacement bonding — 4 kN/m.

For a competent treatment of the roof mastic, one way or another, you need experience and skill. If they are not, it is better to consult professional roofers.

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