Williamsburg Extender Medium 150ml

Wlliamsburg extender medium is a semi-transparent moderate drier used to extend oil paint without altering its consistency. When used in oil painting, do not exceed the maximum ratio of 1:1 extender to paint. The use of this oil painting additive will increase the paint’s tendency to yellow over time.

• A mixture of marble dust and Barium Sulfate
• Add to a maximum ratio of 1:1 extender to paint
• Use as an additive only
• Available in a 150ml tube