I wish I knew to, but I'm guessing 4 hours, and if it still is weak, try 6.
CYMA CM019A2 Well D91 Well D93 Tokyo Marui Uzi
D21 - Lumber D22 - Building Materials D23 - Flooring D24 - Paint D25 - Hardware D26 - Plumbing D27 - Electrical D28 - Seasonal D29 - Kitchen and Bath D30 - Millwork D59 - Decor D90 - Front end/ cashiers/ returns