The colourless resin base to Wicked Colours 4004 works as a low-build inter-coat, transparent extender for colours. 4004 appears milky in solution yet dries clear. Works as a light, protective inter-coat perfect for protecting airbrushed artwork before taping. T-shirt painter may also wish to apply a light coat or two of 4004 onto the fabric prior to painting to lock down any fabric knap. Reduce 4004 Transparent Base 10% per volume with 4011