You can go to the following link to find information about silicone, latex and allergic reations to each material (See Conclusion Below):

www.devicelink.com/mddi/archive/01/04/002.html

CONCLUSION

The biocompatibility and the physical characteristics of polyurethane and silicone-high elongation, low modulus of elasticity, excellent recovery, and resistance to chemicals, oil, and UV light-equal and even exceed those of natural rubber latex. Such characteristics make these two polymer families especially suitable for products such as dip-molded, low-pressure medical balloons. Since both polyurethane and silicone are being manufactured at volume production rates, they can be considered viable nonallergenic alternatives to latex for a range of applications in the medical device industry.

Examples of Medical Conditions

Diabetic,      Asthma,     Penicillin Allergy,     Dairy,

Type 1  Diabetes,  Type 2 Diabetes,    

Severe Peanut Allergy,

Heart Disease,       Angina,         Atrial Fibrillation,      Pacemaker, 

Blood Thinners,      Anticoagulants,     Coumadin,     Warfarin,      Aspirin

Drug Allergies,      Penicillin,      Food allergies,      Peanut,

Insect Allergies,    Bee Stings,     Alzheimer's,    Dementia,    Memory impairment,

Anemia,      Ankylosing Spondylitis,      Asthma,      Autism,

ADD,     ADHD,      Bariatric surgery patients,      Blood Disorders,      Breathing Disorders,

Cerebral Palsy,      COPD,      Cystic Fibrosis,      Emphysema,      Epilepsy,  Seizures,

Hearing,      Sight,       Mentally Impaired,      Hypertension,      Kidney Failure,

Multiple Sclerosis,      Parkinson's Disease,      Multiple Medications,

Rare Diseases,      Stroke Risk,      Surgery,     Transplant,   Cancer Patients.