Extra-soft polyaddition silicone, Shore A 3–6, 500 g

Extra Soft Shore A 3–6 podiatric polyaddition silicone.

An elastomer based on a special silicone polymer developed for the manufacture of highly comfortable, flexible and durable foot orthoses. 

Thanks to its extra-soft formulation, high plasticity and excellent mechanical properties, this polyaddition podiatric silicone allows protective orthoses to be moulded with ease.

Function: Extra Soft Silicone is particularly suitable for the manufacture of soft digital orthoses designed to protect areas subject to friction and overloading. Ideal for creating separators, spacers, interdigital protectors and devices to reduce friction and localised pressure, ensuring maximum comfort even for the most sensitive patients.

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 processing and the long-term durability of the orthosis.

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

Pot life: the time available for moulding 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 Extra Soft 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 system’s reactive components. Precise dosing promotes a complete polymerisation reaction, enabling the formation of a stable and homogeneous elastomeric structure. Alterations to the mixing proportions could affect the catalysis times and the final mechanical properties of the material, compromising the performance of the resulting orthosis.

Functional characteristics

Extra Soft Polyaddition Silicone

Ideal for soft and comfortable podiatric orthoses

High flexibility and resistance to prolonged use

Excellent mechanical properties

No significant shrinkage after curing

Easy to mould

Cures at room temperature

Mixing ratio 1:1

Fast working time

Professional addition-cure silicone formulation

Two-component dual polyaddition silicone for custom-made orthoses

Package contents

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

Class I medical device