Medical grade High Consistency Rubber (HCR)
for Healthcare Applications
Medical grade High Consistency Rubber for Healthcare Applications
Elkem Silicones understands the importance of durability and processability when producing parts for the healthcare market. Silbione™ High Consistency Rubbers (HCRs) are two component platinum-catalyzed heat cure rubbers designed for high strength molding and extrusion processes.
The excellent mechanical characteristics of Silbione™ HCRs make them ideal for a variety of medical device applications including molded medical device parts, balloon catheters and extruded tubing. Our expanding Silbione™ product line offer advantages for producing high quality parts for the healthcare market including easy milling and extrusion, good clarity, high mechanical strength, temperature resistance and high-performance physical properties.
Elkem Silicones offers the following ranges for High Consistency Rubber (HCR) under the Silbione™ brand:
| Brand | Name | Characteristics | LONG TERM IMPLANTATION * | MEDICAL GRADE** |
| Silbione™ BIOMEDICAL | HCRA M5 | Extrusion, high perf. Polyaddition 2K |
♦ | |
| Silbione™ | HCRA 45 | Extrusion, high perf. Polyaddition 2K |
♦ | |
| Silbione™ | HCRA 42 | Extrusion, general Polyaddition 2K |
♦ | |
| Silbione™ | HCRU 44 | Peroxyde curing | ♦ |
* 30 days and more inside the body
** less than 29 days inside the body
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Platinium Curing 2K, Extrusion, High Performance for Long Term Implantation
| Silbione™ poduct | Durometer ShA |
Tensile MPa / psi |
Elongation % |
Tear Strength kNm-1 / ppi |
Specific density |
Appearance | Long Term Implantation support* |
| HCRA M520 A+B | 20 | 8,6 / 1250 | 1 000 | 39 / 225 | 1,11 | Clear | ♦ |
| HCRA M530 A+B | 30 | 11,7 / 1700 | 1 000 | 44 / 250 | 1,12 | Clear | ♦ |
| HCRA M540 A+B | 40 | 11,4 / 1650 | 975 | 44 / 250 | 1,13 | Clear | ♦ |
| HCRA M550 A+B | 50 | 11,4 / 1650 | 950 | 52 / 300 | 1,14 | Clear | ♦ |
| HCRA M560 A+B | 60 | 10,7 / 1550 | 775 | 46 / 265 | 1,15 | Clear | ♦ |
| HCRA M565 A+B | 65 | 10,3 / 1500 | 725 | 44 / 250 | 1,17 | Clear | ♦ |
| HCRA M570 A+B | 70 | 10 / 1450 | 700 | 41 / 235 | 1,18 | Clear | ♦ |
| HCRA M580 A+B | 80 | 8,6 / 1250 | 650 | 39 / 225 | 1,20 | Clear | ♦ |
Platinium Curing 2K, Extrusion, High Performance
| Silbione™ poduct | Durometer ShA |
Tensile MPa / psi |
Elongation % |
Tear Strength kNm-1 / ppi |
Specific density |
Appearance | Biocompatibility support* |
| HCRA 4520 A+B | 20 | 8,6 / 1250 | 1 000 | 39 / 225 | 1,11 | Clear | ♦ |
| HCRA 4530 A+B | 30 | 11,7 / 1700 | 1 000 | 44 / 250 | 1,12 | Clear | ♦ |
| HCRA 4540 A+B | 40 | 11,4 / 1650 | 975 | 44 / 250 | 1,13 | Clear | ♦ |
| HCRA 4550 A+B | 50 | 11,4 / 1650 | 950 | 52 / 300 | 1,14 | Clear | ♦ |
| HCRA 4560 A+B | 60 | 10,7 / 1550 | 775 | 46 / 265 | 1,15 | Clear | ♦ |
| HCRA 4565 A+B | 65 | 10,3 / 1500 | 725 | 44 / 250 | 1,17 | Clear | ♦ |
| HCRA 4570 A+B | 70 | 10 / 1450 | 700 | 41 / 235 | 1,18 | Clear | ♦ |
| HCRA 4580 A+B | 80 | 8,6 / 1250 | 650 | 39 / 225 | 1,20 | Clear | ♦ |
Platinium Curing 2K, Extrusion, General Purpose
| Silbione™ poduct | Durometer ShA |
Tensile MPa / psi |
Elongation % |
Tear Strength kNm-1 / ppi |
Specific density |
Appearance | Biocompatibility support* |
| HCRA 4250 A+B | 50 | 8,2 / 1200 | 400 | 21 / 120 | 1,14 | Hazy | ♦ |
| HCRA 4265 A+B | 65 | 8,8 / 1275 | 600 | 30 / 170 | 1,16 | Hazy | ♦ |
Peroxyde Curing**
| Silbione™ poduct | Durometer ShA |
Tensile MPa / psi |
Elongation % |
Tear Strength kNm-1 / ppi |
Specific density |
Appearance | Biocompatibility support* |
| HCRU 4440 | 48 | >8,5 / >1160 | > 450 | >25 / >142 | 1,10 | Clear | ♦ |
| HCRU 4460 | 62 | >8,5 / >1160 | > 360 | >28 / >160 | 1,15 | Clear | ♦ |
| HCRU 4470 | 70 | >8,5 / >1160 | > 330 | >30 / >170 | 1,18 | Clear | ♦ |
*Silbione™ grade materials have been tested for biocompatibility according to applicable ISO 10993 and/or USP Class VI standards. They are not supported for implantation over 30 days.
**HCRU is an uncatalyzed base: typical properties were achieved with the addition of a peroxide catalyst.The typical properties listed above are not intended for use in preparing specifications. For test methods and specifications, please contact an Elkem representative.
User has sole responsibility to determine product suitability for intended uses and applications.