Gracefield Parish Church is located in Ballymaguigan, a small rural community in County Londonderry, Northern Ireland. This historical building dates back from its origins as a Moravian Church which was established in 1767. Now, it is Gracefield Church of the Parish of Woodschapel in the diocese of Armagh of the Church of Ireland.

The category B2 listed church was suffering from internal fissures and cracks within the previously distempered lime plastered surfaces. KEIM Mineral Paints were chosen for this project due to their unique features and benefits as well as suitability for historical and listed buildings. Leighton Johnston Associates decision to choose KEIM was based on its breathability and durability. KEIM Mineral Paints are highly breathable, allowing moisture to escape from the walls, which is crucial for the preservations of historic buildings.

Tony Carter, Senior Sales Executive of KEIM Mineral Paints, visited the church and recommended removing all loose and flaking materials to pare back the surface to a sound edge. KEIM Fixativ was then applied to consolidate the dusty substrate, followed by KEIM Optil Grob to fill hairline cracks and equalise the textural differences on the surface. KEIM Optil was the chosen paint system, it is the premium interior paint for modern and historic architectural design, combining mineral quality with an attractive, consistent finish that will not crack.