Silicone B20 for orthoplasty - Soft Silicone B20 is used with the Podorsil A catalyst. The dosage of catalyst A and silicone B is done in equal parts: • 50% B20 50% A for a soft hardness • 50% B45 50% A for a firm hardness For protective orthoplasty, B20 is used pure or mixed with a little B45 (from 5 to 20% for complex protective orthoses). Comfort orthoplasty: • Tear resistance: 7 KN/m • Excellent elasticity: 300% - Exceptional elongation at break • Sanding after 12h Color: Dark beige Shore: 20