The resin 1:1 mix ratio by volume, kit volume is volume mixed, is the total volume 500ml kit = 250ml resin A + 250ml hardener B (Total 500ML) Bulk 1L kit = 2X (250ml resin A + 250ml hardener B) (Total 1L) Bulk 1.5L Kit = 3X (250ml Resin A + 250ml Hardener B) (Total 1.5L) Bulk 2L Kit = 4X (250ml Resin A + 250ml Hardener B) (Total 2L) Tips for operation This product is 1:1 fast cure resin, each time mixed, pour No more than 150ml total, (that is 75ml A + 75ml B, A must be ≥ B), with a thickness range of ≤1.2" to avoid bursting. and you can go as deep as you like,just make sure to work in stages. stay under 1.2" per pour. after the surface film cures begin your second pour.