Medical grade soft silicone elastomers used in foot care & advanced orthotics

Fragile limbs like diabetic feet can suffer irreversible damage if not handled properly. Modern insoles and orthoses typically use soft silicone elastomers (RTVs) to absorb part of the body weight or pressure and prevent further damage to the limb.  In the field of foot care, they can also be used to make soft inlays and custom podology inserts.

With the concerns of specialists and patients in mind, Elkem Silicones has developed a full range of medical grade RTVs. Their superior biocompatibility according to ISO 10993 reduces occurrence of irritation and sensitization on fragile skin. The specific viscoelastic properties of silicone ensure sufficient shock and weight absorption while maintaining enough rebound. In addition, Silbione™ RTVs are recognized for their outstanding compromise between low viscosity and high mechanical performances, which makes the manufacturing of insoles and orthoses quick and efficient while preserving a high durability of the end product. 

Our range of Silbione™ RTV includes:

  • Kneadable 2-component pastes for custom podology inserts
  • Extremely soft materials (down to 11 durometer in Shore 00) for sensitive limb parts
  • Colored grades to differentiate the sole inlays
  • Low tack surface grades for easy demolding and increased comfort

 

 

 Silbione™ Reference

Color

Hardness ShA (Sh00)

Viscosity Pa.s at 23°C

Maximum working time 23°C

Tear strength N/mm

Cytotoxicity
Skin sensitization
Skin Irritation
(ISO 10993)

Comment

RTV 4335

Pink

35

Paste

2’

 

♦ ♦ ♦

Podology paste

RTV 4345

Brown

45

Paste

1’50’’

 

♦ ♦ ♦

Podology paste

RTV 4511

trans or blue

(11)

1.2

60'

 

♦ ♦ ♦

cushion & shoe inlay

RTV 4515

skin

(15)

1.5

7'

 

♦ ♦ ♦

cushion & shoe inlay

RTV 4404

Translucent

4

0.9

40’

9

♦ ♦ ♦

Multi-purpose

RTV 4407

Translucent

7

1

20’

1

♦ ♦ ♦

Low mechanicals

RTV 4408

Translucent

4

0.9

40’

9

♦ ♦ ♦

Multi-purpose

RTV 4408 CLR

Transparent

7

1

20’

1

♦ ♦ ♦

Transparent

RTV 4410

Skin or Trans

10

1.9

70’

15

♦ ♦ ♦

Multi-purpose

RTV 4410 LD

White

10

5.2

35’

6.5

♦ ♦ ♦

Low density

 

Learn more about our Silbione™ RTVs on the dedicated product page or by downloading our brochure.

 

At Elkem silicones, we are dedicated people located around the globe, committed to your success. Whether you are looking for a product recommendation, for customized silicone solutions, or for regulatory support, we have the people in place when and where you want them. If you have a medical device project, contact us and our experts will be there to help.