Add Hewbury’s Extender to our water-based products to create a longer open working time. Our Extender slows the drying time of the product, and can also help minimise brush strokes.

Addition rate is 1-2% volume per volume. That is 5-10ml Extender to 500ml of Hewbury Paint or our other water-based liquids.

Use sparingly. Adding more than the recommended amount will negate the quality of the product.  

Hewbury’s Extender is specially formulated for Hewbury’s water-based products – paints, sealers, primers.