Jar Molds
Silicone molds for casting jars and lidded vessels - candle jars, storage jars, relief-embossed containers, boxes and cottage-shaped keepsakes. Most sets cast the body and the lid as separate pieces designed to seat together, which turns a decorative cast into a functional object you can price accordingly.
A jar is two casts that have to fit
The lid is where jar molds succeed or fail. Both pieces shrink slightly as they cure, and if you cast them from different mixes or on different days at different temperatures, the fit drifts. Cast the body and lid from the same batch, in the same session, and they seat properly. This is the single most useful habit for jar casting.
Candle jars need plaster, not resin
If a jar will hold a burning candle, cast it in plaster. Plaster handles sustained heat; resin softens and can discolour. For storage jars, trinket boxes and anything decorative, resin is fine and gives you translucency and colour options plaster cannot.
Relief and embossed surfaces
The embossed jar molds hold fine raised pattern, which is exactly the detail that gets lost if you demold early or use too wet a mix. Let these cure fully and mix on the thicker side. Once cast, a dry-brushed highlight over raised relief makes the pattern read from across a room - it is the cheapest way to make a plaster jar look like a ceramic one.
