Liquitex Professional Slow-Dri Gel Additive 237ml. Slow drying time by 40%, without affecting colour opacity, so you can work it for longer.

Key Features
Extends the open time of your gel colour/medium by 40% so it is blendable and workable for longer
Maintains the same level of transparency
Thickens and increases viscosity
Retains brush/knife marks
Ideal for dry and hot climates

How to Use
Start by adding up to 25% of Slow-dri to your colour/medium with a knife
Mix in slowly and thoroughly, and use
If you're working over a long period of time, mix into colour on the palette to keep it fresh and skin-free for longer
As this is an additive – with no acrylic binders - do not add more than 25% to your colour/medium and do not mix with other additives. This can cause the acrylic film to break down, leaving it sticky and prone to shrinkage
Do not use with any non-acrylic media