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About EPT SEALER
The superior properties unique to EPT SEALER contribute significantly to an increase in the reliability of various products.
EPT SEALER fills various types of gaps, to shut out heat, water, sound, or vibration. Highly functional sealing properties have been developed by blending EPDM rubber foam, which offers the best durability and weather resistance among general rubber material, with Nitto Denko’s unique adhesive technology. Superior resistance to heat and chemicals allows stable and consistent performance over long periods of time. A wide range of types are available depending on usage, from flame retardant to soft or high-compression. The superior performance of EPT SEALER is recognized by various domestic and international industries, and is used in automotives, housing, and home appliances.
Features
- The main constituent is EPDM rubber foam, which boasts superior heat, weather and chemical resistance (to acids and alkalis) compared to general purpose rubbers.
- Excellent foaming technology enables control of expansion from 3 to 20 times the original size.
- Variety of cell structures, such as closed, semi-closed and open cells, are available with Nitto Denko’s extensive foaming process technology.
Structure
Properties
Each 10cm×10cm test specimen was compressed at 10mm/min until the preset thickness was reached. The compression load was then measured after a 10-second delay.
Test specimens prepared using a #1 dumbbell die were exposed to each temperature. At the end of each time interval, the test specimens were attached at 500mm/min, and the maximum breaking elongation was measured. Retained elongation was calculated as a percentage of a new specimen’s elongation.
Each test specimen was placed in a sunshine carbon weather meter and taken out after a set time to measure the elongation by stretching at 500mm/min. Retained elongation was calculated as a percentage of a new specimen’s elongation.
Water-tightness
| Compression[%] | Leakage condition | |||
|---|---|---|---|---|
| No.6800 | No.685 | EE-1000 | EV-1000 | |
| 50 | ○ | △ | × | × |
| 60 | ○ | △ | △ | × |
| 70 | ○ | ○ | ○ | × |
| 80 | ○ | ○ | ○ | ○ |
○：No leakage after 30min. △:Leakage within 30min. ×:Leakage within
【Test method】U-shaped 10mm wide test specimens were punched out and placed between acrylic and aluminum plates for compression to a press load. The test specimens were then filled with water to a depth of 100mm and checked for leakage.
【Test method】U-shaped 10mm wide test specimens were punched out and placed between acrylic and aluminum plates for compression to a press load. The test specimens were then filled with water to a depth of 100mm and checked for leakage.
Chemical Resistance
| Compression [%] | Tensile strength [N/cm2] | |||
|---|---|---|---|---|
| No.6800 | No.685 | EE-1000 | EV-1000 | |
| Initial | 35 | 10 | 8.0 | 5.0 |
| Acid(1%H2SO4) | 30 | 10 | 7.5 | 4.5 |
| Alkali(1%NaOH) | 36 | 9.8 | 7.1 | 4.3 |
*20°C×168himmersion
Comparison of Weather Resistance
* Each test specimen was placed in a sunshine carbon weather meter and taken out after a set time to measure the elongation by stretching at 500mm/min. Retained elongation was calculated as a percentage of the specimen’s new elongation.
Well-balanced Properties
Environmental Measures （Safety）
Product Variation
| Foam type | Series name | Product No. | Color | Adhesive | Structure | ||
|---|---|---|---|---|---|---|---|
|
No.6800 Series |
No.6800 | Black | Foam only | |||
| No.680 | Rubber adhesive | No substrate (single-coated) |
|||||
| No.681 | Acrylic adhesive | No substrate | |||||
| No.6801 | Non-woven cloth substrate | ||||||
| No.6801P | Film substrate | ||||||
|
No.685 Series |
No.685 | Foam only | ||||
| No.686 | Acrylic adhesive | Non-woven cloth substrate | |||||
| No.686P | Film substrate | ||||||
| No.687 | Rubber adhesive | Fabric substrate | |||||
| No.686G | Gray | Acrylic adhesive | Non-woven cloth substrate | ||||
| No.686H | White | ||||||
| EE-1000 Series |
EE-1000 | Black | Foam only | ||||
| EE-1010 | Acrylic adhesive | Non-woven cloth substrate | |||||
| EE-1010P | Fabric substrate | ||||||
| EE-1040 | Rubber adhesive | Fabric substrate | |||||
| EC-100 Series *UL-94 HF-1 certified foam |
EC-100 | Foam only | |||||
| EC-110 | Acrylic adhesive | Non-woven cloth substrate | |||||
| EC-111P | Film substrate | ||||||
| EC-140 | Rubber adhesive | Fabric substrate | |||||
| EC-200 Series *UL-94HBF certified foam |
EC-200 | Foam only | |||||
| EC-210 | Acrylic adhesive | Non-woven cloth substrate | |||||
| EC-210P | Film substrate | ||||||
| EC-240 | Rubber adhesive | Fabric substrate | |||||
| EV-1000 Series |
EV-1000 | - | Foam only | ||||
| EV-1010 | Black | Acrylic adhesive | Non-woven cloth substrate | ||||
| EV-1010P | Film substrate | ||||||
| EV-1040 | - | Rubber adhesive | Fabric substrate | ||||
Applications
Door mirrors
Rear combination lights
Door trim
Air conditioners
Ventilators
Door speakers
