Mega electronics tin plating crystals 1 litre5 litre mega electronics 600 021 this tin of seno immerse tin crystals 450g for 5 litres from mega electronics is sufficient to cover 06msup2 of boards the powder is mixed with warm 50degc water allowed to cool and used at room temperature no heated tanks are required the low operating temperature allows very small tin molecules to be deposited giving a very smooth and hard surface the longer the board is left immersed the thicker