Silicon rubber plug
Instant silicon rubber plug un vulcanized. In 20 minute give you any shape and size of plugs 4 1/2 inch x 3 inch 1/4 inch thick 5 once.
Each plug reqvire only 0.8 gram the 5 once give out 100 plugs, depend from the size.
Instruction how to make 1 plug or 100 plugs.
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