Dirko HT (red)
mofakult AG
Zug
Key information
- Publication date:30 October 2025
- Workload:100%
- Contract type:Permanent position
- Place of work:Zug
Dirko HT
(red)
Description and application area Dirko HT red (acetoxy curing) is a high-quality, high-temperature resistant, one-component sealant based on silicone that exhibits permanently elastic behavior. It has very good adhesion to all common metals, cast iron, plastics (except PE, PP, and PTFE), and glass. By reacting with moisture in the air, Dirko HT red crosslinks to silicone. The product is characterized by a very wide range of applications. 1. General product information Chemical base
Acetoxy silicone
Curing
Room temperature curing (RTV) Components
One-component
Color
Red
Consistency
Pastose, stable, permanently elastic in the cured state Temperature range
-60°C to +300°C (up to +315°C for 24h) Maximum gap
2.0 mm pH value
Neutral
Electrical conductivity
Insulating
Resistance to
Mineral oils (also with additives), synthetic oils, 0
Lubricating greases, coolants, UV radiation, cold 20
2 and hot water, saltwater, cleaning agents, /7
0 weak acids and alkalis l ani Possible application areas
Valve cover, oil pan, water and oil pump, gi rO Differential housing, transmission housing, gear s .r a e D ölwanne, thermostat housing, control housing, b egg sn
Axle cover, flange connection, headlight, ui ar rl eE H
Taillight, battery box e© hci lg nü rp sr u r ed t bi ElringKlinger AG elb st
Max-Eyth-Straße 2 | D-72581 Dettingen/Erms ne mu Fon +49 7123 724-799 | Fax +49 7123 724-798 koD s elring@elring.de | www.elring.com e d r eb eh rU Dirko HT
(red)
2. Technical data
2.1 General properties
Measurement
Value
Test standard
Shore A hardness
30 - 5
DIN 53505
Density
1.1 - 0.2 g/ml
DIN 53479
Skin formation time
5 - 10 min
DIN EN ISO 291
(23°C, 50% relative humidity) Curing time approx. 4.5 mm / 24 h DIN EN ISO 291
(23°C, 50% relative humidity) E-modulus 100%
0.6 - 0.2 N/mm²
DIN EN ISO 8339
Elongation at break
600 - 100 %
DIN 53504
Tensile strength
2.9 - 0.2 N/mm²
DIN 53504
02
02
/7
0 la ni gir
O s a .rD e be gg sn ui rl ar eE H e© hci lg nü rp sr u r ed t bi ElringKlinger AG elb st
Max-Eyth-Straße 2 | D-72581 Dettingen/Erms ne mu Fon +49 7123 724-799 | Fax +49 7123 724-798 koD s elring@elring.de | www.elring.com e d r eb eh rU Dirko HT
(red)
2.2 Media resistance
To demonstrate the media resistance of the sealant, the test specimen is stored in the respective medium for the specified duration. Afterwards, the tensile shear strength is determined (ISO 4587). The following table shows the percentage deviation of the tensile shear strength from the initial value after storage in the medium.
Deviation
Temperature
Medium
Property from initial value [%] [°C]
250 h
500 h
1000 h
Elongation at break (%)
250
-2
4
31
Tensile strength (N/mm²)
250
44
43
32
Air
Elongation at break (%)
285
50
62
83
Tensile strength (N/mm²)
285
1
-15
-20
Elongation at break (%)
120
21
33
45
Engine oil
Tensile strength (N/mm²)
120
-9
-15
-50
Water/
Elongation at break (%)
95
1
11
-12
Glycol
(50/50)
Tensile strength (N/mm²)
95
84
87
69
02
02
/7
0 la ni gir
O s a .rD e be gg sn ui rl ar eE H e© hci lg nü rp sr u r ed t bi ElringKlinger AG elb st
Max-Eyth-Straße 2 | D-72581 Dettingen/Erms ne mu Fon +49 7123 724-799 | Fax +49 7123 724-798 koD s elring@elring.de | www.elring.com e d r eb eh rU Dirko HT
(red)
2.3 Curing speed The curing speed depends on temperature and humidity. The higher the temperature and humidity, the faster Dirko HT red crosslinks to silicone. The lower diagram shows the time development of the curing speed under standard climate (23°C/50% r.H.). 2.4 Surface adhesion
The adhesion of Dirko HT red on different surfaces plays an essential role when used as a flange seal. The following values show the tensile shear strength measured at a sealing gap of 1 mm (ISO 4587). Substrate
Tensile shear strength
02
0
[N/mm²]
2/
7 0 l
Steel (galvanized)
0.90 a nig ir
Aluminum
2.00
O sa
Polyamide 6.6
0.60
.rD e be gg sn ui rl ar eE
H e© hci lg nü rp sr u r ed t bi ElringKlinger AG elb st
Max-Eyth-Straße 2 | D-72581 Dettingen/Erms ne mu Fon +49 7123 724-799 | Fax +49 7123 724-798 koD s elring@elring.de | www.elring.com e d r eb eh rU Dirko HT
(red)
3. General notes
3.1. Instructions for use and processing:
1.
Remove sealing residues and clean the sealing surfaces with solvent.
Processing temperature (ambient / adhesion surface temperature): +5 to +35°C 4.
Apply sealant continuously and evenly. 5.
Remove excess sealant immediately to avoid dripping into the interior.
6.
Depending on the application, assembly of parts is possible immediately after application, after skin formation, or after complete curing. 7.
Assemble components according to manufacturer instructions. 8.
0
Item no. Packaging content Filling quantity Color
Package
CLP label
2
02
/7
Tube, tube key,
DE/EN/FR/IT/PT/ES/RU/
0
705.708
70 ml red
12 pieces l a
Nozzle
BG/CN/CZ/DK/EE/FI/ ni
GR/HR/HU/LT/LV/NL/ gir
O
465.766
Cartridge, nozzle
310 ml red
12 pieces s
NO/PL/RO/SE/SI/SK a .rD e be gg sn ui rl ar eE H e© hci lg nü rp sr u r ed t bi ElringKlinger AG elb st
Max-Eyth-Straße 2 | D-72581 Dettingen/Erms ne mu Fon +49 7123 724-799 | Fax +49 7123 724-798 koD s elring@elring.de | www.elring.com e d r eb eh rU Dirko HT
(red)
3.4. Disclaimer
The above information in this technical data sheet, especially suggestions for processing and application areas of our products, are based on our current knowledge and experience. Due to the different possible applications and the conditions of use and work outside our control, we assume no liability for the suitability of our products for the relevant production processes under the specific working conditions, as well as the intended processing purposes and results. To ensure such suitability, we recommend sufficient prior in-house trials and tests in any case. Any liability resulting from the information in this technical data sheet and any other written or oral advice for the present product is expressly excluded. Unless there is a case of injury to life, body, or health, we are guilty of intent or gross negligence, or liability exists under mandatory product liability law. 02
02
/7
0 la ni gir
O s a .rD e be gg sn ui rl ar eE H e© hci lg nü rp sr u r ed t bi ElringKlinger AG elb st
Max-Eyth-Straße 2 | D-72581 Dettingen/Erms ne mu Fon +49 7123 724-799 | Fax +49 7123 724-798 koD s elring@elring.de | www.elring.com e d r eb eh rU
(red)
Description and application area Dirko HT red (acetoxy curing) is a high-quality, high-temperature resistant, one-component sealant based on silicone that exhibits permanently elastic behavior. It has very good adhesion to all common metals, cast iron, plastics (except PE, PP, and PTFE), and glass. By reacting with moisture in the air, Dirko HT red crosslinks to silicone. The product is characterized by a very wide range of applications. 1. General product information Chemical base
Acetoxy silicone
Curing
Room temperature curing (RTV) Components
One-component
Color
Red
Consistency
Pastose, stable, permanently elastic in the cured state Temperature range
-60°C to +300°C (up to +315°C for 24h) Maximum gap
2.0 mm pH value
Neutral
Electrical conductivity
Insulating
Resistance to
Mineral oils (also with additives), synthetic oils, 0
Lubricating greases, coolants, UV radiation, cold 20
2 and hot water, saltwater, cleaning agents, /7
0 weak acids and alkalis l ani Possible application areas
Valve cover, oil pan, water and oil pump, gi rO Differential housing, transmission housing, gear s .r a e D ölwanne, thermostat housing, control housing, b egg sn
Axle cover, flange connection, headlight, ui ar rl eE H
Taillight, battery box e© hci lg nü rp sr u r ed t bi ElringKlinger AG elb st
Max-Eyth-Straße 2 | D-72581 Dettingen/Erms ne mu Fon +49 7123 724-799 | Fax +49 7123 724-798 koD s elring@elring.de | www.elring.com e d r eb eh rU Dirko HT
(red)
2. Technical data
2.1 General properties
Measurement
Value
Test standard
Shore A hardness
30 - 5
DIN 53505
Density
1.1 - 0.2 g/ml
DIN 53479
Skin formation time
5 - 10 min
DIN EN ISO 291
(23°C, 50% relative humidity) Curing time approx. 4.5 mm / 24 h DIN EN ISO 291
(23°C, 50% relative humidity) E-modulus 100%
0.6 - 0.2 N/mm²
DIN EN ISO 8339
Elongation at break
600 - 100 %
DIN 53504
Tensile strength
2.9 - 0.2 N/mm²
DIN 53504
02
02
/7
0 la ni gir
O s a .rD e be gg sn ui rl ar eE H e© hci lg nü rp sr u r ed t bi ElringKlinger AG elb st
Max-Eyth-Straße 2 | D-72581 Dettingen/Erms ne mu Fon +49 7123 724-799 | Fax +49 7123 724-798 koD s elring@elring.de | www.elring.com e d r eb eh rU Dirko HT
(red)
2.2 Media resistance
To demonstrate the media resistance of the sealant, the test specimen is stored in the respective medium for the specified duration. Afterwards, the tensile shear strength is determined (ISO 4587). The following table shows the percentage deviation of the tensile shear strength from the initial value after storage in the medium.
Deviation
Temperature
Medium
Property from initial value [%] [°C]
250 h
500 h
1000 h
Elongation at break (%)
250
-2
4
31
Tensile strength (N/mm²)
250
44
43
32
Air
Elongation at break (%)
285
50
62
83
Tensile strength (N/mm²)
285
1
-15
-20
Elongation at break (%)
120
21
33
45
Engine oil
Tensile strength (N/mm²)
120
-9
-15
-50
Water/
Elongation at break (%)
95
1
11
-12
Glycol
(50/50)
Tensile strength (N/mm²)
95
84
87
69
02
02
/7
0 la ni gir
O s a .rD e be gg sn ui rl ar eE H e© hci lg nü rp sr u r ed t bi ElringKlinger AG elb st
Max-Eyth-Straße 2 | D-72581 Dettingen/Erms ne mu Fon +49 7123 724-799 | Fax +49 7123 724-798 koD s elring@elring.de | www.elring.com e d r eb eh rU Dirko HT
(red)
2.3 Curing speed The curing speed depends on temperature and humidity. The higher the temperature and humidity, the faster Dirko HT red crosslinks to silicone. The lower diagram shows the time development of the curing speed under standard climate (23°C/50% r.H.). 2.4 Surface adhesion
The adhesion of Dirko HT red on different surfaces plays an essential role when used as a flange seal. The following values show the tensile shear strength measured at a sealing gap of 1 mm (ISO 4587). Substrate
Tensile shear strength
02
0
[N/mm²]
2/
7 0 l
Steel (galvanized)
0.90 a nig ir
Aluminum
2.00
O sa
Polyamide 6.6
0.60
.rD e be gg sn ui rl ar eE
H e© hci lg nü rp sr u r ed t bi ElringKlinger AG elb st
Max-Eyth-Straße 2 | D-72581 Dettingen/Erms ne mu Fon +49 7123 724-799 | Fax +49 7123 724-798 koD s elring@elring.de | www.elring.com e d r eb eh rU Dirko HT
(red)
3. General notes
3.1. Instructions for use and processing:
1.
Remove sealing residues and clean the sealing surfaces with solvent.
- 2.
- Sealing surfaces must be clean, dry, oil- and grease-free before applying the sealant to ensure secure sealing and adhesion.
Processing temperature (ambient / adhesion surface temperature): +5 to +35°C 4.
Apply sealant continuously and evenly. 5.
Remove excess sealant immediately to avoid dripping into the interior.
6.
Depending on the application, assembly of parts is possible immediately after application, after skin formation, or after complete curing. 7.
Assemble components according to manufacturer instructions. 8.
- Immediate sealing function is given. 9.
- After use, close the sealant container tightly again.
- Optimal storage conditions: cool (+5°C to +25°C) and dry
- Minimum shelf life: 24 months in unopened containers.
0
Item no. Packaging content Filling quantity Color
Package
CLP label
2
02
/7
Tube, tube key,
DE/EN/FR/IT/PT/ES/RU/
0
705.708
70 ml red
12 pieces l a
Nozzle
BG/CN/CZ/DK/EE/FI/ ni
GR/HR/HU/LT/LV/NL/ gir
O
465.766
Cartridge, nozzle
310 ml red
12 pieces s
NO/PL/RO/SE/SI/SK a .rD e be gg sn ui rl ar eE H e© hci lg nü rp sr u r ed t bi ElringKlinger AG elb st
Max-Eyth-Straße 2 | D-72581 Dettingen/Erms ne mu Fon +49 7123 724-799 | Fax +49 7123 724-798 koD s elring@elring.de | www.elring.com e d r eb eh rU Dirko HT
(red)
3.4. Disclaimer
The above information in this technical data sheet, especially suggestions for processing and application areas of our products, are based on our current knowledge and experience. Due to the different possible applications and the conditions of use and work outside our control, we assume no liability for the suitability of our products for the relevant production processes under the specific working conditions, as well as the intended processing purposes and results. To ensure such suitability, we recommend sufficient prior in-house trials and tests in any case. Any liability resulting from the information in this technical data sheet and any other written or oral advice for the present product is expressly excluded. Unless there is a case of injury to life, body, or health, we are guilty of intent or gross negligence, or liability exists under mandatory product liability law. 02
02
/7
0 la ni gir
O s a .rD e be gg sn ui rl ar eE H e© hci lg nü rp sr u r ed t bi ElringKlinger AG elb st
Max-Eyth-Straße 2 | D-72581 Dettingen/Erms ne mu Fon +49 7123 724-799 | Fax +49 7123 724-798 koD s elring@elring.de | www.elring.com e d r eb eh rU
