4g of silicone Goes on watch gaskets to give watch tight seal Stands up well to heat and friction Goes on clear and odorless Seiko silicone grease 50 works great for watch gaskets and winding mechanism of automatic/mechanical movements. The lubricant will prove highly effective for reproduction and preservation of waterproofness. Apply needed amount for safe and effective lubrication that can stand up to heat and friction from operating watch parts. You get a plastic bottle of 4 grams with lid that can close to keep it safe when not in use.