A chemical release agent, amber in colour, which reacts with the cement to produce a smooth finish to concrete., A.P.R.A. is applied to the inner face of shuttering, form work and moulds, before the casting of concrete. A.P.R.A. is used to break the bond and allow an easy release between the cast concrete and the form work. May also be used to stop the build-up of concrete on tools, handling equipment and machinery.
How to mix concrete
Learn how to mix concrete in a wheelbarrow.
How to make coloured concrete
Coloured concrete is easy to make and a great way to improve the look of your home.
How to remove a concrete slab
Find out how easy it is the remove a concrete slab yourself.
How to level concrete
See how to give wet concrete a clean, level finish.
How to build a brick wall
The art of laying bricks is a good skill to learn if you want to take your D.I.Y. to the next level. We’ll show you what’s involved in building a brick wall.
How to install wire mesh in concrete
Steel is an excellent way to strengthen concrete structures. Learn how to lay it properly before you pour concrete.
How to dig a foundation
Before your pour any concrete footings, learn how to dig the trench correctly.
How to build a stud wall
Tips for building a stud wall inside an existing house frame