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Silicone adhesives
MEMO
on gluing silicone products
A special adhesive is used for gluing silicone products in a closed loop (butt-bonding of cords or seals of complex cross-section). It is applied to a section of a dry, non-greasy surface. If it is necessary to improve the adhesion characteristics, an adhesion primer is used.
The surfaces to be bonded are joined together and held in this position until the required functional strength is achieved. The adhesive cures with air moisture at room temperature. The time of surface film formation is about 90 minutes. Complete drying of the adhesive takes 72 hours. Optimal application conditions are determined by the customer.
Adhesives sealants
DOWSIL 730 FS
Solvent-resistant fluorosilicon one-component adhesive-sealant
Description
Sealer DOWSIL 730 FS – it is a ready-to-use, non-draining, solvent-free fluorosilicon rubber paste that reacts with moisture from the air to form a strong, solid rubber. It is a liquid-resistant material that is ideal for use in many applications where resistance to fumes, splashes, and sometimes when completely submerged in fuels, oils, and solvents is required.
Sealer DOWSIL 730 FS it has good resistance to weather conditions, vibrations, humidity, ozone and extreme temperatures. It retains its elasticity over a wide temperature range.
Sealer DOWSIL 730 FS it can be applied on the ceiling or vertical surfaces without fear that it will drain, slide or peel off.
Characteristic
- One-component fluorosilicon adhesive-sealant
- Hardens at room temperature under the influence of moisture from the air
- Acetoxyl curing system
- Non-slip, pasty consistency
- Easy to apply
- After curing, it becomes a strong, elastic rubber
- Good adhesion to various materials
- Stable and elastic from -65°C to +260°C
- Retains its properties when exposed to fuels, oils, and solvents
Delivery form
Tube of 90 ml
Application
- For bonding and sealing applications where resistance to the swelling effect of fuels, solvents and oils is required.
- For assembly and / or repair of fuel systems and tanks.
- It is used for forming gaskets on site where it is impossible to use conventional gaskets due to non-standard shape and harsh environmental conditions.
- For bonding and sealing parts exposed to moisture, vibration, shock, fuel, solvents and oils for extended periods of time.
- For gluing RTI from fluorosilicon rubber compounds together and gluing them to various surfaces
|
Type of rubber curing system |
Acetate Type |
|
Colour |
White |
|
Appearance |
Non-draining paste |
|
Extrusion speed through a nozzle with a cross-section of 3.2 mm at a pressure of 0.62 MPa, g / min |
321 |
|
Time to film formation, min |
12 |
|
Time to loss of stickiness, min |
14 |
|
Specific gravity, g / cm3 |
1,44 |
|
Shore A hardness, units. |
40 |
|
Elongation at break, % |
195 |
|
Tensile strength, MPa |
3,00 |
|
Tensile strength-pattern B, kN / m |
11,9 |
|
Brittleness point, °C |
-65 |
|
Peel strength, aluminum, primed, kN / m |
6,8 |
|
Arc resistance, seconds |
124 |
|
Dielectric strength, (kV / mm) |
14,5 |
|
Dielectric constant at 100 Hz |
7,11 |
|
Dissipation factor at 100 kHz |
0,007 |
|
Volume resistance, Ohms. cm |
5,1*1013 |
|
Wednesday |
Volume swellings, % |
Change in hardness |
|
Methanol |
1,4 |
-4 |
|
JP-5 |
2,5 |
-5 |
|
Diesel fuel |
1,5 |
-5 |
|
Isopropanol |
1,7 |
-4 |
|
JP-8 |
3,1 |
-4 |
|
Exposure time, days |
0 |
1 |
3 |
7 |
14 |
|
Tested at room temperature after exposure at 149°C
|
|||||
|
Shore A Hardness |
43 |
44 |
45 |
45 |
47 |
|
Tensile strength, MPa |
2.99 |
3,38 |
3,14 |
3,03 |
2,98 |
|
Lengthening,% |
195 |
195 |
177 |
171 |
159 |
|
Tensile strength, kN / m |
11,91 |
26,97 |
9,63 |
9,11 |
8.93 |
|
Tested at room temperature after exposure at 204°C.C |
|||||
|
Shore A Hardness |
43 |
43 |
46 |
47 |
45 |
|
Tensile strength, MPa |
2.99 |
3,03 |
2,65 |
2,62 |
2,25 |
|
Lengthening,% |
195 |
173 |
140 |
138 |
128 |
|
Tensile strength, kN / m |
11,91 |
9,28 |
8,76 |
8,41 |
8.06 |
|
Surface film formation time, (23°C, 50 % rel. humidity), min. |
12 |
|
Time to loss of stickiness, min |
14 |
|
Curing time (23°C, 50% humidity), h/ 1mm |
8 |
- Sealer DOWSIL 730 FS It is mainly used for bonding, sealing and sealing joints where resistance to the effect of swelling under the influence of fuels, oils and solvents is required. Other possible use cases include:
- Sealing joints on storage tanks for various liquids
- Sealing of fuel lines and tankers
- Providing temporary patches on rubber linings
- Sealing of pipe joints in pipelines for the transport of solvents
- Forming gaskets "in place" (flanges, housings) to ensure the sealing of chemical compressors
- Forming seals where conventional gaskets are not suitable (non-standard shape or harsh environmental conditions).
- Bonding or sealing parts that are exposed to moisture, vibrations, shocks, certain fuels, oils, and solvents over long periods of time
Surface preparation
All surfaces must be clean and dry. Degrease and wash off any dirt that may affect adhesion with suitable solvents: isopropyl alcohol, acetone, or methyl ethyl ketone.
Non-priming adhesion can be obtained on many substrates, such as glass, metals, and many types of conventional industrial plastics. Substrates that are usually difficult to get good adhesion to include PTFE (Teflon), polyethylene, polypropylene, and similar materials. For maximum adhesion, it is recommended to use a primer Dow Corning® 1200 OS Primer. After cleaning with a solvent, a thin layer of primer is applied Dow Corning Apply OS Primer by dipping, brushing or spraying. Allow the primer to dry for 15-90 minutes at room temperature and a relative humidity of 50% or higher.
Application
Apply the sealant DOWSIL 730 FS on one of the prepared surfaces,
then quickly cover it with another base designed for gluing.
When exposed to moisture, the newly applied material forms a primary film after about 12 minutes at room temperature and 50% relative humidity. Any manipulations with the tools must be completed before this film is formed. The surface is easily treated with a spatula. The adhesive / sealant will lose its stickiness in about 14 minutes.
Curing time
After the primary film is formed, curing continues from the surface inwards. After 24 hours (at room temperature and 50% relative humidity), the sealant is applied DOWSIL 730 FS it will cure to a depth (from the surface inwards) of approximately 3 mm. Very deep areas, especially with limited access to atmospheric moisture, will take longer to fully cure. The higher the humidity, the less time it will take to polymerize the sealant.
Before moving and packing the glued parts, the user is advised to wait a long enough time to be more confident that this will not affect the integrity of the bonding seam. This will depend on many factors and must be determined by the user on a case-by-case basis.
Compatibility
Sealer DOWSIL 730 FS releases a small amount of acetic acid during the curing process. This can lead to corrosion on some metal parts or substrates, especially in direct contact or when curing takes place in a completely enclosed space, which will not allow the release of by-products of curing.
When stored at temperatures up to 32°C in the original unopened packaging sealer DOWSIL 730 FS it has a shelf life of 18 months from the date of production. Since the sealant DOWSIL 730 FS cures due to interaction with moisture from the air, keep the container tightly closed while the product is not in use. During storage, a crust of previously used material may form on the tip of the tube or the edges of the cartridge. It is easy to remove and does not affect the remaining contents of the package.
This product has not been tested in any way for suitability for use in pharmaceuticals and medicine.
Pentelast®-1143
Silicone sealer (available at TU 2252-138-40245042-2006)
Description
Pentelast®-1143 —multifunctional one-component acid adhesive-sealant for professional use for bonding materials and sealing joints. It is used for surface sealing and insulation of equipment operating in an air environment, and protecting it from moisture. It is used as a filling compound in electronic, radio and electrical engineering. For bonding silicone rubber and gluing it to other materials. For sealing materials operating under vibration conditions. For sealing threaded connections. Used as a liquid pad
Features
- Resistant — absolutely water-resistant, weather-resistant and UV-resistant
- Durable – has increased strength when exposed to mechanical loads
- Easy and functional to use – does not require primers to increase adhesion, it is used both at low (+50 C), and at high temperatures (+400 C)
- Elastic – has high tensile and compressive properties, and retains its properties both at low temperatures (-600 C), and at high temperatures (+2500 C)
- High adhesion – exceptional adhesion strength to silicone rubber, glass, ceramics, wood, brick, plastic and artificial materials (including epoxy resin, polyester) and other surfaces
- Electrical insulation – has high dielectric properties
- Operating mode: from -600From to +2500With
Security requirements
Pentelast®-1143 It is not classified as a dangerous product and does not require special protection measures when used. The adhesive-sealant should be used in well-ventilated areas, and in case of contact with skin or clothing, it can be removed with white spirit. When frozen, it is not harmful to health. Keep out of reach of children
Packaging
Pentelast®-1143 is packaged in 310 ml cartridges.
Key product indicators
|
Brand Pentelast-1143 |
But |
B |
|
Appearance |
Homogeneous viscous (grade B) or visco-fluid (grade A) semi-transparent mass |
|
|
Colour |
Colorless or light gray |
|
|
Elongation at break,%, not less |
450 |
600 |
|
Tensile strength, MPa, not less |
2,0 |
3,5 |
|
Surface film curing time up to art. 3, min, not less |
10 |
10 |
MANNOL 9916 Gasket Maker Transparent
Description
MANNOL Gasket Maker Transparent is a high-quality one-component silicone sealant that vulcanizes to the state of silicone rubber at room temperature. It has excellent adhesive and bonding properties. It is suitable for gluing and sealing car windshields, headlights, turn signals and brake lights. Replaces rubber, paper, and cork seals. Resistant to lubricants, coolants, and water. It can be used in working with glass, plastic, ceramics and aluminum. It is easy to apply and remains flexible. After applying to a non-greasy surface, smooth and smooth using soapy water. After 24 hours, the gasket can be loaded. Operating temperatures from -40 °C to +180 °C (short-term).
Package weight: 85g
Characteristic*
| Property | Result |
| Smell | Sour |
| Colour | Transparent |
*The listed physical and chemical characteristics are typical and may change in the future with the requirements in accordance with MANNOL standards.
Method of application
The surfaces to be sealed must be clean, dry and free of grease. Apply the sealant evenly and immediately connect the surfaces without waiting for the solvent to evaporate. After applying on a clean and oiled surface, smooth and smooth the surface with a soap solution. After 24 hours, the gasket can be loaded. Operating temperatures from -40 °C to +180 °C (short-term). Store in tightly closed original packaging in a dry place at a temperature of +5 °C to +25 °C.
UNICIL AZB
Characteristic
UNICIL AZB one-component silicone adhesive-sealant, cured by air moisture at low temperature, ready to use.
Features
- Acetate curing system.
- Non-spreading.
- High elasticity from -50 to + 250°C.
- Excellent adhesion to most surfaces and types of glass, rubber, as well as polymer and metal surfaces.
- Processed at low +5 and high +40 0C temperatures.
- Good resistance to oils, acids, alkalis, various gases, weather events, including ultraviolet, water and antifreeze.
- It does not contain solvents.
Application
Universal adhesive and sealant for industrial applications.
Properties of uncured adhesive-sealant
| Type of curing system | Acetate Type |
| Colour | Transparent, White, Black |
| Density, g / cm3 | 1,03 |
| Extrusion rate, (through a 3 mm nozzle, at 0.63 N / mm2, 23 °C), ml / min | 250 |
Properties of cured adhesive-sealant
(2 mm film, 14 days of exposure at 23 °C, 50% rel. humidity level)
| Colour | Transparent, White, Black |
| Density, g / cm3 | 1,03 |
| Shore A hardness, units. | 23 |
| Elongation at break, % | 400 |
| Breaking strength, N / mm2 | 1,6 |
| Tear resistance, N / mm | 5,0 |
| Modulus at 100% elongation, N / mm2 | 0,4 |
| Joint mobility, % | 35 |
Properties of uncured adhesive-sealant
| Surface film formation time, (23°C, 50 % rel. humidity), min. | 5 |
| Curing time (23°C, 50% humidity), mm / 24 hours | 3 |
Nanensing method
Surface preparation
Surfaces must be clean, dry, dust-free, free of grease, and free of substances that may impair the adhesion of the sealant.
If it is necessary to improve the adhesion characteristics, an adhesion primer is used. On non-porous surfaces, the primer is applied with a swab or with a lint-free cloth, in a uniform thin layer. For porous surfaces, use a soft brush. If the primer is highly absorbed, it is possible to apply a second coat after the first one has dried.
Dimensions of the joint and seam.
It is necessary to take into account possible working deformations and loads. Usually, the width is 2 times the thickness.
UNICIL A3B it has high adhesion to most materials without pre-priming. Preliminary testing is recommended to optimize the application.
UNICIL A3B it has a guaranteed shelf life at temperatures from +5 to +25° C in its original packaging for 12 months. The shelf life is indicated for each batch of the product on the label.
Keeping
Storage for longer than the specified period does not indicate that the product is unsuitable. However, in this case, before using the product, it is necessary to conduct tests for compliance with the tested characteristics.
Security measures
During the vulcanization of UNISYL A3B, acetic acid vapors are released. These fumes should not be inhaled for a long time or at high concentrations. The work area should be well ventilated. It is necessary to avoid contact of uncured silicone adhesive-sealant with the eyes and mucous tissues, which can lead to their irritation. If this happens, rinse the affected area with plenty of water.
RTV 118Q
Silicone heat-resistant adhesive sealer with food grade approval.
Material Description
RTV 118 Q is a high-quality one-component colorless silicone adhesive-sealant that vulcanizes at room temperature from contact with atmospheric moisture to form a strong silicone rubber. In its initial state, it is a paste for applying on vertical and horizontal surfaces in the form of a coating or joint with a thickness of no more than 6 mm. The time of surface film formation is about 90 minutes.
Full vulcanization time is 72 hours.
During vulcanization, acetic acid vapors are released in the amount of 1 % of its own weight.
Basic Properties
- One-component material.
- Thixotropic – does not run down from vertical surfaces and retains the specified shape.It allows you to avoid spreading where necessary.
- Excellent electrical insulation properties.
- Excellent water resistance, weather resistance, ozone resistance, UV resistance.
- Wide operating temperature range (-60 °C to +260 °C).
- Excellent adhesive properties (metals, glass, ceramics, silicone rubber).
- Allowed for contact with food.
Recommended use
- Clean the surfaces to be bonded from ice, soap, dirt and grease and dry them.
- Remove the cap, cut the spout to the desired sealing diameter at an angle of 45°.
- Apply a continuous and even layer of adhesive-sealant to one of the surfaces, quickly connect the surfaces to be bonded and immediately remove excess.
- After use, squeeze the tube so that there is no air left in it and tighten the cap tightly.
Security measures
RTV 118 Q should be used in well-ventilated areas, and in case of contact with skin or mucous membranes, rinse with plenty of water. Keep out of reach of children.
Shelf life in undamaged packaging is 12 months at a temperature not exceeding 25 °C.
Product packaging
The RTV 118 Q comes in 85g tubes.
Tube consumption - 3 m of a seam with a diameter of 6 mm.
Elastosil E 43
Universal adhesive for technical applications
Characteristic
ELASTOSIL E 43 is a one-component silicone rubber cured by air moisture at low temperature, ready for use, with very high mechanical characteristics.
Features
- Acetate curing system.
- Self-expanding.
- Excellent adhesion to various materials without the use of primers • Operating temperature range:
- 200 °C – long time
- 250 °C – no more than 1 day.
Application
Universal adhesive for technical applications.
Properties of uncured rubber
| Type of curing system | Acetate Type |
| Colour | Transparent, Black |
| Density, g / cm3 | 1,09 |
| Viscosity at 230° C, MPa s | 250 |
Properties of cured rubber
(2 mm film, 14 days of exposure at 23 °C, 50% rel. humidity level)
| Colour | Transparent, Black |
| Density, g / cm3 | 1,09 |
| Shore A hardness, units. | 30 |
| Elongation at break, % | 500 |
| Breaking strength, N / mm2 | 4,5 |
| Tear resistance, N / mm | 13,0 |
Properties of uncured adhesive-sealant
| Surface film formation time, (23°C, 50 % rel. humidity), min. | 10 — 15 |
| Curing time (23°C, 50% humidity), hour/1 mm | 12 |
Application method
Surface preparation
Before applying the adhesive, the surfaces to be bonded must be cleaned of dirt, washed in toluene, white spirit, alcohol or acetone, and thoroughly dried. Then apply ELASTOSIL E 43 and wait for the film to form. Next, start gluing the material.
ELASTOSIL E 43 has high adhesion to most materials without pre-priming. Preliminary testing is recommended to optimize the application.
Keeping
ELASTOSIL E 43 has a guaranteed shelf life at temperatures from +5 to +25° C in its original packaging for 9 months. The shelf life is indicated for each batch of the product on the label. Storage for longer than the specified period does not indicate that the product is unsuitable. However, in this case, before using the product, it is necessary to conduct tests for compliance with the tested characteristics.
Security measures
During the vulcanization of ELASTOSIL E 43, about 4% by weight of acetic acid vapors are released. These fumes should not be inhaled for a long time or at high concentrations. The work area should be well ventilated. Avoid contact of non-vulcanized silicone rubber with the eyes and mucous tissues, which can lead to their irritation. If this happens, rinse the affected area with plenty of water. For more complete instructions, see the product's security certificates.
Delivery form
Cartouche with a volume of 310 ml under the "gun".
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