diff --git a/packages/mdc-floating-label/gss_gss.scss b/packages/mdc-floating-label/gss_gss.scss
new file mode 100644
index 00000000000..935490bbc41
--- /dev/null
+++ b/packages/mdc-floating-label/gss_gss.scss
@@ -0,0 +1,32 @@
+// NOTE: This file is a duplicate of mdc-floating-label.scss.
+// This duplicate is required to make the Sass file compatible with MSS.
+// MSS Sass uses @require and @provide, these are invalid at-rules outside google3.
+
+// Copyright 2017 Google Inc.
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+@use '@material/base/mixins' as base-mixins;
+@use './mixins';
+
+@provide 'mdc.floatinglabel';
+
+@include base-mixins.emit-once('mdc-floating-label') {
+  @include mixins.core-styles;
+}
diff --git a/packages/mdc-notched-outline/gss_gss.scss b/packages/mdc-notched-outline/gss_gss.scss
new file mode 100644
index 00000000000..e15de2edfd2
--- /dev/null
+++ b/packages/mdc-notched-outline/gss_gss.scss
@@ -0,0 +1,33 @@
+// NOTE: This file is a duplicate of mdc-notched-outline.scss.
+// This duplicate is required to make the Sass file compatible with MSS.
+// MSS Sass uses @require and @provide, these are invalid at-rules outside google3.
+
+// Copyright 2017 Google Inc.
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+@use 'third_party/javascript/material_components_web/base/mixins' as base-mixins;
+@use './mixins';
+
+@provide 'mdc.notchedoutline';
+
+// Notched Outline is intended for use by multiple components, but its styles should only be emitted once when bundled
+@include base-mixins.emit-once('mdc-notched-outline') {
+  @include mixins.core-styles;
+}