• Medium Shore A 18–22 Polyaddition Silicone, 500 g
  • Medium Shore A 18–22 Polyaddition Silicone, 500 g
  • Medium Shore A 18–22 Polyaddition Silicone, 500 g
  • Medium Shore A 18–22 Polyaddition Silicone, 500 g
  • Medium Shore A 18–22 Polyaddition Silicone, 500 g
  • Medium Shore A 18–22 Polyaddition Silicone, 500 g

Medium Shore A 18–22 Polyaddition Silicone, 500 g

  • Medium-viscosity polyaddition silicone, ideal for compensatory, protective and moderately corrective orthotics
  • Cures at room temperature with a fast working time
  • 1:1 mixing ratio, easy to mould
  • 1 x 250 ml jar of Base + 1 x 250 ml jar of Activator + 2 measuring spoons
  • Shore A 18–22

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Product description

Medium Shore A 18–22 polyaddition silicone for podiatry.

An elastomer based on a special silicone polymer developed for the manufacture of strong, functional and long-lasting foot orthoses.

Thanks to its high plasticity, excellent mechanical properties and medium hardness, this polyaddition podiatric silicone enables the creation of orthoses offering a perfect balance between comfort, support and compensatory capacity.


Function: Medium Silicone is particularly suitable for the manufacture of toe orthoses that require a good level of support and containment, whilst maintaining a high level of comfort for the patient. Its medium hardness makes it ideal for protective and compensatory devices designed to reduce localised pressure, improve toe alignment and promote correct load distribution whilst walking.

It is the ideal solution for professionals seeking a versatile material, positioned between extremely soft silicones and those with a higher corrective capacity.


Curing: curing takes place at room temperature through a rapid polymerisation reaction that leads to the formation of the final polymer. This process guarantees linear shrinkage close to zero, ensuring dimensional stability, precision during fabrication and a long service life for the orthosis.


Linear shrinkage: linear shrinkage refers to the dimensional change in the silicone following catalysis. In Medium silicone, this is approximately 0.1 per cent, an extremely low value that allows the orthosis to retain the shape modelled by the professional almost unchanged. This ensures greater precision, dimensional stability and a better fit to the patient’s foot.


Pot life: the time available for shaping the orthosis is one of the most important aspects when working with silicone. During this time, the material retains the correct consistency for processing after the two components have been mixed. In Medium Polyaddition Silicone, the pot life is approximately 1 minute and 30 seconds. This means that once mixed, the practitioner has sufficient time to blend the product, mould the orthosis and position it correctly on the patient.


Catalysis: after mixing, the silicone begins the catalysis process, increasing in consistency until it sets completely in less than 5 minutes. During this phase, the polymerisation reaction continues until the polymer is fully formed, which is responsible for the orthosis’s elastic properties and final stability.

This balance between working time and curing speed enables the creation of precise and comfortable orthoses whilst optimising operating times in the podiatry practice.


Mixing: mixing in a 1:1 ratio ensures the correct balance between the reactive components of the system. Precise dosing promotes a complete polymerisation reaction, allowing the formation of a stable and homogeneous elastomeric structure. Alterations to the mixing ratios could affect the catalysis times and the final mechanical properties of the material, compromising the performance of the resulting orthosis.


Functional characteristics

Ideal for compensatory and protective podiatric orthoses

Optimal balance between comfort, support and containment

High flexibility, strength and durability

Excellent mechanical properties and dimensional stability

No significant shrinkage after curing

Easy to mould

Cures at room temperature


Contents of the pack

  • 1 x 250 ml jar of Base B
  • 1 x 250 ml jar of Activator A
  • 2 measuring spoons


Class I medical device

How to use

How to use Medium polyaddition podiatric silicone?

Hints

To preserve the silicone’s performance, it is important always to work in a clean environment and avoid cross-contamination between the two components. 

Certain substances may inhibit the polymerisation reaction, compromising the material’s proper curing. Always use clean, dry tools, gloves and spoons. Do not use with latex, talcum-powdered gloves, oils or solvents, as these may alter the curing process. Store the product at a temperature between 5°C and 27°C.

Details
Final hardness: Shore A 20 ±2
Mixing ratio: 1:1 (Parte A + Parte B)
Pot Life: circa 1'30''
Setting time: inferiore a 5 minuti
Linear retraction: circa 0,1%
Class I medical device: Classe I
Basic Jar B: 250 ml
Activator A Jar: 250 ml
Measuring spoon: 2
Frequently asked questions
Can you add more hardener to speed up the setting process?
Ensure the 1:1 ratio is maintained: altering it may compromise the catalytic process and the final properties of the orthosis.
Why isn’t the silicone curing properly?
Check the dosage, the uniformity of the mixture and for any contamination with latex, talcum powder, oils or solvents.
Can the same spoon be used for both ingredients?
Use separate measuring containers to prevent contamination between the base and the activator.
Is the working time the same as the setting time?
No. The first refers to the time available for modelling; the second concerns the curing of the material.
Why might the silicone fail to cure properly even if the components have been mixed?
The presence of contaminants may inhibit the polymerisation reaction and impair catalysis. Work in a clean area, using clean, dry instruments, gloves and spoons, and avoid contact with latex, talcum powder, oils and solvents.
At what temperature should podiatric silicone be stored?
Store the product at a temperature between 5 °C and 27 °C, ensuring it remains within the specified range to maintain its performance.
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