diff --git a/Core/include/Acts/Material/AccumulatedSurfaceMaterial.hpp b/Core/include/Acts/Material/AccumulatedSurfaceMaterial.hpp
index 12c233a37e2..7107410bfec 100644
--- a/Core/include/Acts/Material/AccumulatedSurfaceMaterial.hpp
+++ b/Core/include/Acts/Material/AccumulatedSurfaceMaterial.hpp
@@ -37,7 +37,7 @@ class AccumulatedSurfaceMaterial {
   /// Default Constructor - for homogeneous material
   ///
   /// @param splitFactor is the pre/post splitting directive
-  explicit AccumulatedSurfaceMaterial(double splitFactor = 0.);
+  AccumulatedSurfaceMaterial(double splitFactor = 0.);
 
   /// Explicit constructor with only full MaterialSlab,
   /// for one-dimensional binning.
diff --git a/Core/include/Acts/Material/HomogeneousVolumeMaterial.hpp b/Core/include/Acts/Material/HomogeneousVolumeMaterial.hpp
index 0bb49452cd3..91005dcae55 100644
--- a/Core/include/Acts/Material/HomogeneousVolumeMaterial.hpp
+++ b/Core/include/Acts/Material/HomogeneousVolumeMaterial.hpp
@@ -25,7 +25,7 @@ class HomogeneousVolumeMaterial : public IVolumeMaterial {
   /// Explicit constructor
   ///
   /// @param material is the material held by this
-  explicit HomogeneousVolumeMaterial(const Material& material);
+  HomogeneousVolumeMaterial(const Material& material);
 
   /// Copy Constructor
   ///
diff --git a/Core/include/Acts/Material/ISurfaceMaterial.hpp b/Core/include/Acts/Material/ISurfaceMaterial.hpp
index ebeb5ff45af..a379e18e715 100644
--- a/Core/include/Acts/Material/ISurfaceMaterial.hpp
+++ b/Core/include/Acts/Material/ISurfaceMaterial.hpp
@@ -38,7 +38,7 @@ class ISurfaceMaterial {
   /// Constructor
   ///
   /// @param splitFactor is the splitting ratio between pre/post update
-  explicit ISurfaceMaterial(double splitFactor) : m_splitFactor(splitFactor) {}
+  ISurfaceMaterial(double splitFactor) : m_splitFactor(splitFactor) {}
 
   /// Constructor
   ///
diff --git a/Core/include/Acts/Material/InterpolatedMaterialMap.hpp b/Core/include/Acts/Material/InterpolatedMaterialMap.hpp
index 5c0f1014fe9..eb792539871 100644
--- a/Core/include/Acts/Material/InterpolatedMaterialMap.hpp
+++ b/Core/include/Acts/Material/InterpolatedMaterialMap.hpp
@@ -247,8 +247,7 @@ class InterpolatedMaterialMap : public IVolumeMaterial {
   /// @brief Create interpolated map
   ///
   /// @param [in] mapper Material map
-  explicit InterpolatedMaterialMap(Mapper_t&& mapper)
-      : m_mapper(std::move(mapper)) {}
+  InterpolatedMaterialMap(Mapper_t&& mapper) : m_mapper(std::move(mapper)) {}
 
   /// @brief Create interpolated map
   ///
diff --git a/Core/include/Acts/Material/MaterialInteraction.hpp b/Core/include/Acts/Material/MaterialInteraction.hpp
index 0a02bf1e398..e3b078d310a 100644
--- a/Core/include/Acts/Material/MaterialInteraction.hpp
+++ b/Core/include/Acts/Material/MaterialInteraction.hpp
@@ -32,11 +32,11 @@ struct InteractionVolume {
 
   /// Constructor from tracking volume
   /// @param tv The tracking volume
-  explicit InteractionVolume(const TrackingVolume* tv) : trackingVolume(tv) {}
+  InteractionVolume(const TrackingVolume* tv) : trackingVolume(tv) {}
 
   /// Constructor from detector volume
   /// @param dv The detector volume
-  explicit InteractionVolume(const Experimental::DetectorVolume* dv)
+  InteractionVolume(const Experimental::DetectorVolume* dv)
       : detectorVolume(dv) {}
 
   /// Forward the geometry identifier
diff --git a/Core/include/Acts/Material/PropagatorMaterialAssigner.hpp b/Core/include/Acts/Material/PropagatorMaterialAssigner.hpp
index 0f4d3275545..5c3c0fa0339 100644
--- a/Core/include/Acts/Material/PropagatorMaterialAssigner.hpp
+++ b/Core/include/Acts/Material/PropagatorMaterialAssigner.hpp
@@ -98,7 +98,7 @@ class PropagatorMaterialAssigner final : public IAssignmentFinder {
  public:
   /// @brief  Construct with propagator
   /// @param propagator
-  explicit PropagatorMaterialAssigner(propagator_t propagator)
+  PropagatorMaterialAssigner(propagator_t propagator)
       : m_propagator(std::move(propagator)) {}
 
   /// @brief Method for generating assignment candidates for the
diff --git a/Core/include/Acts/Material/ProtoVolumeMaterial.hpp b/Core/include/Acts/Material/ProtoVolumeMaterial.hpp
index d26769c790a..38206e8f6dc 100644
--- a/Core/include/Acts/Material/ProtoVolumeMaterial.hpp
+++ b/Core/include/Acts/Material/ProtoVolumeMaterial.hpp
@@ -35,7 +35,7 @@ class ProtoVolumeMaterial : public IVolumeMaterial {
   ///
   /// @param binUtility a BinUtility determining the granularity
   ///        and binning of the material on the volume
-  explicit ProtoVolumeMaterial(const BinUtility& binUtility);
+  ProtoVolumeMaterial(const BinUtility& binUtility);
 
   /// Copy constructor
   ///
diff --git a/Core/src/Material/VolumeMaterialMapper.cpp b/Core/src/Material/VolumeMaterialMapper.cpp
index 8074ed52d04..ca7c00b5730 100644
--- a/Core/src/Material/VolumeMaterialMapper.cpp
+++ b/Core/src/Material/VolumeMaterialMapper.cpp
@@ -498,7 +498,7 @@ void Acts::VolumeMaterialMapper::mapMaterialTrack(
           sfIter++;
         }
       }
-      rmIter->volume = InteractionVolume{volIter->volume};
+      rmIter->volume = volIter->volume;
       rmIter->intersectionID = currentID;
       rmIter->intersection = rmIter->position;
     }