Rattling sound from brake pads

[solanog]

I change the brake pads of my '90 Accord a week ago but the car had some rattles besides the ones from the steering which I've been told are "natural" in this cars (90-93 Accords), by the way is this true or it can be fixed at a reasonable cost?
So this weekend I took the pads off and put some silicone on the bases and edges (were they don't contact the discs) the rattling stopped. Pads weren't genuine from Honda, is this siliconizing O.K or is there other more reasonable method of stopping this noises? BTW discs are new Brembos too.