Colour blocking: let’s play!
While cement blocks on a patio are extremely practical, they can also be pretty boring. Make a statement and
paint them in bright colours – ready for a fiesta!
1 Acid etch the surface with a solution of hydrochloric acid to remove laitance, or treat uncured cement as follows: dilute one part hydrochloric acid with two parts water, and scrub with a steel brush; more than one application may be necessary to achieve a paintable surface. Don’t forget to wear protective gloves.
2 Paint the blocks with a sponge roller and PVA in the colours of your choice. Apply two coats, allowing sufficient drying time in-between. Tip
Don’t paint all the blocks; rather create a checkerboard effect by painting alternate pavers in black and white, or play with a variety of colours to add a fun element to a kiddies’ play area.
IMPORTANT This treatment is only suitable for a low-traffic area. To extend the longevity of the paint, seal the blocks with a clear exterior sealant such as New Spectra Paints’ Stiro Bonding Sealer after they’ve dried thoroughly. However, this will make the blocks more slippery when wet.
Shopping list • hydrochloric acid • Dulux Exterior Matt PVA in the colours of your choice • exterior sealant (optional) Tools • steel brush • protective gloves • sponge roller • paint tray • mixing bowl