Silicone gel for pregnant women?

I'm black16 weeks pregnant,I've 4 months old scar in my upper eyelid with no improvement.I've been advised by a doctor here to use silicon gel (plato's serum,can't find it in KSA)but my dermatologist advices me not to use anything while pregnant(she's also my friend so maybe out of OVER concern)I found another brand here in KSA :kelo-cote(Polysiloxanes,Silicone Dioxide)is it totally safe to use during pregnancy?i have old dark hypertrophic scar 3 cm long across my knee can I use it there too