diff --git a/.changeset/real-jokes-walk.md b/.changeset/real-jokes-walk.md
new file mode 100644
index 0000000000..0fcf031829
--- /dev/null
+++ b/.changeset/real-jokes-walk.md
@@ -0,0 +1,7 @@
+---
+'@siemens/ix-angular': patch
+'@siemens/ix': patch
+'@siemens/ix-vue': patch
+---
+
+build: remove internal polyfills
diff --git a/packages/angular/src/app-initialize.ts b/packages/angular/src/app-initialize.ts
index 786457d95c..5c35442b0e 100644
--- a/packages/angular/src/app-initialize.ts
+++ b/packages/angular/src/app-initialize.ts
@@ -8,7 +8,7 @@
  */
 
 import { defineCustomElements as iconsDefineCustomElements } from '@siemens/ix-icons/loader';
-import { applyPolyfills, defineCustomElements } from '@siemens/ix/loader';
+import { defineCustomElements } from '@siemens/ix/loader';
 
 let didInitialize = false;
 
@@ -22,9 +22,8 @@ export const appInitialize = (doc: Document) => {
 
       didInitialize = true;
 
-      await applyPolyfills();
+      defineCustomElements();
       await iconsDefineCustomElements();
-      await defineCustomElements();
     }
   };
 };
diff --git a/packages/core/.eslintignore b/packages/core/.eslintignore
index 6a2148d724..68102d276f 100644
--- a/packages/core/.eslintignore
+++ b/packages/core/.eslintignore
@@ -1,2 +1,3 @@
 playwright-ct.config.ts
 playwright.config.ts
+stencil.config.ts
diff --git a/packages/core/component-doc.json b/packages/core/component-doc.json
index 7829b7f199..bfd76cc3cd 100644
--- a/packages/core/component-doc.json
+++ b/packages/core/component-doc.json
@@ -2,8 +2,8 @@
   "timestamp": "",
   "compiler": {
     "name": "@stencil/core",
-    "version": "4.13.0",
-    "typescriptVersion": "5.4.2"
+    "version": "4.18.3",
+    "typescriptVersion": "5.4.5"
   },
   "components": [
     {
diff --git a/packages/documentation/static/code-runtime/html/src/main.js b/packages/documentation/static/code-runtime/html/src/main.js
index 43f87d00a2..9dc5853f03 100644
--- a/packages/documentation/static/code-runtime/html/src/main.js
+++ b/packages/documentation/static/code-runtime/html/src/main.js
@@ -7,10 +7,9 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-import { applyPolyfills, defineCustomElements } from '@siemens/ix/loader';
+import { defineCustomElements } from '@siemens/ix/loader';
 import './styles/global.css';
 
 (async () => {
-  await applyPolyfills();
-  await defineCustomElements();
+  defineCustomElements();
 })();
diff --git a/packages/html-test-app/src/main.js b/packages/html-test-app/src/main.js
index 27b10e80f6..9a17961cb5 100644
--- a/packages/html-test-app/src/main.js
+++ b/packages/html-test-app/src/main.js
@@ -7,10 +7,9 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-import { applyPolyfills, defineCustomElements } from '@siemens/ix/loader';
+import { defineCustomElements } from '@siemens/ix/loader';
 import 'example-styles/dist/global.css';
 
 (async () => {
-  await applyPolyfills();
-  await defineCustomElements();
+  defineCustomElements();
 })();
diff --git a/packages/html-test-app/src/preview-examples/init.js b/packages/html-test-app/src/preview-examples/init.js
index b8657f996d..c2b45fa684 100644
--- a/packages/html-test-app/src/preview-examples/init.js
+++ b/packages/html-test-app/src/preview-examples/init.js
@@ -8,7 +8,7 @@
  */
 
 import { defineCustomElements as ixIconsDefineCustomElements } from '@siemens/ix-icons/loader';
-import { applyPolyfills, defineCustomElements } from '@siemens/ix/loader';
+import { defineCustomElements } from '@siemens/ix/loader';
 import 'example-styles/dist/global.css';
 import './placeholder-logo';
 
@@ -71,9 +71,8 @@ function setBodySizes() {
 }
 
 (async function init() {
-  await applyPolyfills();
   await ixIconsDefineCustomElements();
-  await defineCustomElements();
+  defineCustomElements();
 
   detectThemeSwitching();
   setBodySizes();
diff --git a/packages/vue/src/plugin.ts b/packages/vue/src/plugin.ts
index a4b2a5449d..3bf54345ee 100644
--- a/packages/vue/src/plugin.ts
+++ b/packages/vue/src/plugin.ts
@@ -1,10 +1,8 @@
-import { applyPolyfills, defineCustomElements } from '@siemens/ix/loader';
+import { defineCustomElements } from '@siemens/ix/loader';
 import { Plugin } from 'vue';
 
 export const ixPlugin: Plugin = {
   async install() {
-    applyPolyfills().then(() => {
-      defineCustomElements();
-    });
+    defineCustomElements();
   },
 };
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index ad092e232a..16529f26f6 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -270,7 +270,7 @@ importers:
         version: 2.11.8
       '@stencil/core':
         specifier: ^4.13.0
-        version: 4.13.0
+        version: 4.18.3
       '@types/luxon':
         specifier: ^3.3.7
         version: 3.3.7
@@ -295,19 +295,19 @@ importers:
         version: 0.7.1(@typescript-eslint/eslint-plugin@6.18.1(@typescript-eslint/parser@6.18.1(eslint@8.56.0)(typescript@5.3.3))(eslint@8.56.0)(typescript@5.3.3))(@typescript-eslint/parser@6.18.1(eslint@8.56.0)(typescript@5.3.3))(eslint-plugin-react@7.33.2(eslint@8.56.0))(eslint@8.56.0)(typescript@5.3.3)
       '@stencil-community/postcss':
         specifier: ^2.2.0
-        version: 2.2.0(@stencil/core@4.13.0)
+        version: 2.2.0(@stencil/core@4.18.3)
       '@stencil/angular-output-target':
         specifier: ^0.8.3
-        version: 0.8.3(@stencil/core@4.13.0)
+        version: 0.8.3(@stencil/core@4.18.3)
       '@stencil/react-output-target':
         specifier: ^0.5.3
-        version: 0.5.3(@stencil/core@4.13.0)
+        version: 0.5.3(@stencil/core@4.18.3)
       '@stencil/sass':
         specifier: ^3.0.8
-        version: 3.0.8(@stencil/core@4.13.0)
+        version: 3.0.8(@stencil/core@4.18.3)
       '@stencil/vue-output-target':
         specifier: ^0.8.7
-        version: 0.8.7(@stencil/core@4.13.0)
+        version: 0.8.7(@stencil/core@4.18.3)
       '@testing-library/dom':
         specifier: ^8.11.0
         version: 8.20.1
@@ -3288,8 +3288,8 @@ packages:
     engines: {node: '>=14.10.0', npm: '>=6.0.0'}
     hasBin: true
 
-  '@stencil/core@4.13.0':
-    resolution: {integrity: sha512-gg+gtBWekQ08mDja8GVAUHNu+rrFhQaKZDvfhnS3l/5JbYiJddTimuDPPhuc0sR0JZL1iRdJTJSa+JbvmnQ1cQ==}
+  '@stencil/core@4.18.3':
+    resolution: {integrity: sha512-8yoG5AFQYEPocVtuoc5kvRS0Hku0MoDWDUpADRaXPVHsOFLmxR16LJENj25ucCz5GEfeTGQ/tCE8JAypPmr/fQ==}
     engines: {node: '>=16.0.0', npm: '>=7.10.0'}
     hasBin: true
 
@@ -17056,30 +17056,30 @@ snapshots:
       tsutils: 3.21.0(typescript@5.3.3)
       typescript: 5.3.3
 
-  '@stencil-community/postcss@2.2.0(@stencil/core@4.13.0)':
+  '@stencil-community/postcss@2.2.0(@stencil/core@4.18.3)':
     dependencies:
-      '@stencil/core': 4.13.0
+      '@stencil/core': 4.18.3
       postcss: 8.4.31
 
-  '@stencil/angular-output-target@0.8.3(@stencil/core@4.13.0)':
+  '@stencil/angular-output-target@0.8.3(@stencil/core@4.18.3)':
     dependencies:
-      '@stencil/core': 4.13.0
+      '@stencil/core': 4.18.3
 
   '@stencil/core@3.2.1': {}
 
-  '@stencil/core@4.13.0': {}
+  '@stencil/core@4.18.3': {}
 
-  '@stencil/react-output-target@0.5.3(@stencil/core@4.13.0)':
+  '@stencil/react-output-target@0.5.3(@stencil/core@4.18.3)':
     dependencies:
-      '@stencil/core': 4.13.0
+      '@stencil/core': 4.18.3
 
-  '@stencil/sass@3.0.8(@stencil/core@4.13.0)':
+  '@stencil/sass@3.0.8(@stencil/core@4.18.3)':
     dependencies:
-      '@stencil/core': 4.13.0
+      '@stencil/core': 4.18.3
 
-  '@stencil/vue-output-target@0.8.7(@stencil/core@4.13.0)':
+  '@stencil/vue-output-target@0.8.7(@stencil/core@4.18.3)':
     dependencies:
-      '@stencil/core': 4.13.0
+      '@stencil/core': 4.18.3
 
   '@svgr/babel-plugin-add-jsx-attribute@8.0.0(@babel/core@7.23.7)':
     dependencies: