Originally Posted by
sithjedi333
Radians custom ear plug kit, about $10 on Amazon. Very comfy and stays in ear better than off the shelf plugs.
There are some reports of the silicone not solidifying properly (read the reviews), so I tested it by mixing a little of the compound beforehand and had no problems.
Professional-made custom earplugs and earphone sleeves are amazing at noise isolation and are extremely comfortable. However, they are expensive. DIY kits can also give excellent results. Radians and other similar kits appear to be small packs of 2-part medical grade firm silicon; like the type dentists use for impressions. 1kg of this can be had for less than $10 so these packs have a nice mark-up. Problems with solidifying are likely to be issues with mixing. The temperature will also affect set times, so use from fridge if you want to have longer to play with the fit.