diff --git a/rbx_binary/src/serializer/state.rs b/rbx_binary/src/serializer/state.rs
index acecadca8..504403914 100644
--- a/rbx_binary/src/serializer/state.rs
+++ b/rbx_binary/src/serializer/state.rs
@@ -449,7 +449,7 @@ impl<'dom, 'db, W: Write> SerializerState<'dom, 'db, W> {
                 // There's no assurance that the default SharedString value
                 // will actually get serialized inside of the SSTR chunk, so we
                 // check here just to make sure.
-                if let Cow::Owned(Variant::SharedString(sstr)) = &default_value {
+                if let Variant::SharedString(sstr) = default_value.borrow() {
                     if !self.shared_string_ids.contains_key(sstr) {
                         self.shared_string_ids.insert(sstr.clone(), 0);
                         self.shared_strings.push(sstr.clone());
diff --git a/rbx_dom_lua/src/database.json b/rbx_dom_lua/src/database.json
index 4047d1b81..6066ab1d8 100644
--- a/rbx_dom_lua/src/database.json
+++ b/rbx_dom_lua/src/database.json
@@ -511,6 +511,9 @@
             ]
           }
         },
+        "ModelMeshData": {
+          "SharedString": ""
+        },
         "ModelMeshSize": {
           "Vector3": [
             0.0,
@@ -22232,6 +22235,9 @@
             ]
           }
         },
+        "ModelMeshData": {
+          "SharedString": ""
+        },
         "ModelMeshSize": {
           "Vector3": [
             0.0,
@@ -27034,6 +27040,9 @@
             ]
           }
         },
+        "ModelMeshData": {
+          "SharedString": ""
+        },
         "ModelMeshSize": {
           "Vector3": [
             0.0,
@@ -30797,6 +30806,9 @@
       "Superclass": "PartOperation",
       "Properties": {},
       "DefaultProperties": {
+        "AeroMeshData": {
+          "SharedString": ""
+        },
         "Anchored": {
           "Bool": false
         },
@@ -30877,6 +30889,9 @@
         "ChildData": {
           "BinaryString": ""
         },
+        "ChildData2": {
+          "SharedString": ""
+        },
         "CollisionGroup": {
           "String": "Default"
         },
@@ -30954,6 +30969,12 @@
         "MeshData": {
           "BinaryString": ""
         },
+        "MeshData2": {
+          "SharedString": ""
+        },
+        "PhysicalConfigData": {
+          "SharedString": ""
+        },
         "PhysicsData": {
           "BinaryString": ""
         },
@@ -35598,6 +35619,9 @@
         }
       },
       "DefaultProperties": {
+        "AeroMeshData": {
+          "SharedString": ""
+        },
         "Anchored": {
           "Bool": false
         },
@@ -35762,6 +35786,9 @@
         "MeshId": {
           "Content": ""
         },
+        "PhysicalConfigData": {
+          "SharedString": ""
+        },
         "PhysicsData": {
           "BinaryString": ""
         },
@@ -36534,6 +36561,9 @@
             ]
           }
         },
+        "ModelMeshData": {
+          "SharedString": ""
+        },
         "ModelMeshSize": {
           "Vector3": [
             0.0,
@@ -37314,6 +37344,9 @@
       "Superclass": "PartOperation",
       "Properties": {},
       "DefaultProperties": {
+        "AeroMeshData": {
+          "SharedString": ""
+        },
         "Anchored": {
           "Bool": true
         },
@@ -37394,6 +37427,9 @@
         "ChildData": {
           "BinaryString": ""
         },
+        "ChildData2": {
+          "SharedString": ""
+        },
         "CollisionGroup": {
           "String": "Default"
         },
@@ -37471,6 +37507,12 @@
         "MeshData": {
           "BinaryString": ""
         },
+        "MeshData2": {
+          "SharedString": ""
+        },
+        "PhysicalConfigData": {
+          "SharedString": ""
+        },
         "PhysicsData": {
           "BinaryString": ""
         },
@@ -39644,6 +39686,9 @@
         }
       },
       "DefaultProperties": {
+        "AeroMeshData": {
+          "SharedString": ""
+        },
         "Anchored": {
           "Bool": false
         },
@@ -39724,6 +39769,9 @@
         "ChildData": {
           "BinaryString": ""
         },
+        "ChildData2": {
+          "SharedString": ""
+        },
         "CollisionGroup": {
           "String": "Default"
         },
@@ -39801,6 +39849,12 @@
         "MeshData": {
           "BinaryString": ""
         },
+        "MeshData2": {
+          "SharedString": ""
+        },
+        "PhysicalConfigData": {
+          "SharedString": ""
+        },
         "PhysicsData": {
           "BinaryString": ""
         },
@@ -65305,6 +65359,9 @@
             ]
           }
         },
+        "ModelMeshData": {
+          "SharedString": ""
+        },
         "ModelMeshSize": {
           "Vector3": [
             0.0,
@@ -68951,6 +69008,9 @@
       "Superclass": "PartOperation",
       "Properties": {},
       "DefaultProperties": {
+        "AeroMeshData": {
+          "SharedString": ""
+        },
         "Anchored": {
           "Bool": false
         },
@@ -69031,6 +69091,9 @@
         "ChildData": {
           "BinaryString": ""
         },
+        "ChildData2": {
+          "SharedString": ""
+        },
         "CollisionGroup": {
           "String": "Default"
         },
@@ -69108,6 +69171,12 @@
         "MeshData": {
           "BinaryString": ""
         },
+        "MeshData2": {
+          "SharedString": ""
+        },
+        "PhysicalConfigData": {
+          "SharedString": ""
+        },
         "PhysicsData": {
           "BinaryString": ""
         },
@@ -74842,6 +74911,9 @@
             ]
           }
         },
+        "ModelMeshData": {
+          "SharedString": ""
+        },
         "ModelMeshSize": {
           "Vector3": [
             0.0,
@@ -75024,6 +75096,9 @@
             ]
           }
         },
+        "ModelMeshData": {
+          "SharedString": ""
+        },
         "ModelMeshSize": {
           "Vector3": [
             0.0,
@@ -75128,6 +75203,12 @@
         "HSRAssetId": {
           "Content": ""
         },
+        "HSRData": {
+          "SharedString": ""
+        },
+        "HSRMeshIdData": {
+          "SharedString": ""
+        },
         "HistoryId": {
           "UniqueId": "00000000000000000000000000000000"
         },
@@ -75422,6 +75503,12 @@
         "HSRAssetId": {
           "Content": ""
         },
+        "HSRData": {
+          "SharedString": ""
+        },
+        "HSRMeshIdData": {
+          "SharedString": ""
+        },
         "HistoryId": {
           "UniqueId": "00000000000000000000000000000000"
         },
@@ -75602,6 +75689,12 @@
         "HSRAssetId": {
           "Content": ""
         },
+        "HSRData": {
+          "SharedString": ""
+        },
+        "HSRMeshIdData": {
+          "SharedString": ""
+        },
         "HistoryId": {
           "UniqueId": "00000000000000000000000000000000"
         },
diff --git a/rbx_reflection_database/CHANGELOG.md b/rbx_reflection_database/CHANGELOG.md
index 769ac318e..cbdb9a31e 100644
--- a/rbx_reflection_database/CHANGELOG.md
+++ b/rbx_reflection_database/CHANGELOG.md
@@ -3,7 +3,9 @@
 ## Unreleased Changes
 * Update to Roblox version 647.
 * `Model.WorldPivotData`'s default value is now `null`. ([#450])
+* `SharedString` properties now have default values. ([#458])
 
+[#458]: https://github.com/rojo-rbx/rbx-dom/pull/458
 [#450]: https://github.com/rojo-rbx/rbx-dom/pull/450
 
 ## 0.2.12+roblox-638 (2024-08-22)
diff --git a/rbx_reflection_database/database.msgpack b/rbx_reflection_database/database.msgpack
index 2aeee98d9..f28eaf475 100644
Binary files a/rbx_reflection_database/database.msgpack and b/rbx_reflection_database/database.msgpack differ
diff --git a/rbx_reflector/src/defaults.rs b/rbx_reflector/src/defaults.rs
index f62976023..fadf0462b 100644
--- a/rbx_reflector/src/defaults.rs
+++ b/rbx_reflector/src/defaults.rs
@@ -62,8 +62,8 @@ fn apply_instance_defaults(database: &mut ReflectionDatabase, instance: &Instanc
         let property_name = Cow::Owned(property_name.clone());
 
         match property_value.ty() {
-            // We skip these types because their defaults aren't useful.
-            VariantType::Ref | VariantType::SharedString => continue,
+            // We skip the Ref type because its default value is not useful.
+            VariantType::Ref => continue,
 
             _ => class
                 .default_properties