diff --git a/core/api.txt b/core/api.txt
index e215126378..499de5e3c3 100644
--- a/core/api.txt
+++ b/core/api.txt
@@ -636,6 +636,13 @@ ion-modal,event,ionModalDidPresent,void,true
 ion-modal,event,ionModalDidUnload,void,true
 ion-modal,event,ionModalWillDismiss,OverlayEventDetail,true
 ion-modal,event,ionModalWillPresent,void,true
+ion-modal,css-prop,--background
+ion-modal,css-prop,--border-color
+ion-modal,css-prop,--border-radius
+ion-modal,css-prop,--border-style
+ion-modal,css-prop,--border-width
+ion-modal,css-prop,--height
+ion-modal,css-prop,--width
 
 ion-nav-pop
 
diff --git a/core/src/components/button/button.scss b/core/src/components/button/button.scss
index f9011a42a8..9bc3c4ad7a 100644
--- a/core/src/components/button/button.scss
+++ b/core/src/components/button/button.scss
@@ -41,6 +41,9 @@
   --width: auto;
   --overflow: hidden;
   --ripple-color: currentColor;
+  --border-width: initial;
+  --border-color: initial;
+  --border-style: initial;
 
   display: inline-block;
 
diff --git a/core/src/components/modal/modal.ios.scss b/core/src/components/modal/modal.ios.scss
index 8262155797..8c8770d979 100644
--- a/core/src/components/modal/modal.ios.scss
+++ b/core/src/components/modal/modal.ios.scss
@@ -4,14 +4,13 @@
 // iOS Modals
 // --------------------------------------------------
 
-.modal-wrapper-ios {
-  // hidden by default to prevent flickers, the animation will show it
-
-  @include transform(translate3d(0, 100%, 0));
-
-  @media only screen and (min-width: $modal-inset-min-width) and (min-height: $modal-inset-min-height-small) {
-    @include border-radius($modal-ios-border-radius);
-
-    overflow: hidden;
+@media only screen and (min-width: $modal-inset-min-width) and (min-height: $modal-inset-min-height-small) {
+  :host {
+    --border-radius: #{$modal-ios-border-radius};
   }
 }
+
+.modal-wrapper {
+  // hidden by default to prevent flickers, the animation will show it
+  @include transform(translate3d(0, 100%, 0));
+}
diff --git a/core/src/components/modal/modal.md.scss b/core/src/components/modal/modal.md.scss
index af2fe9aef8..aabfa3d6f7 100644
--- a/core/src/components/modal/modal.md.scss
+++ b/core/src/components/modal/modal.md.scss
@@ -5,16 +5,15 @@
 // Material Design Modals
 // --------------------------------------------------
 
-.modal-wrapper-md {
+@media only screen and (min-width: $modal-inset-min-width) and (min-height: $modal-inset-min-height-small) {
+  :host {
+    --border-radius: 2px;
+    --box-shadow: #{$modal-inset-box-shadow};
+  }
+}
+
+.modal-wrapper {
   @include transform(translate3d(0, 40px, 0));
 
-  @media only screen and (min-width: $modal-inset-min-width) and (min-height: $modal-inset-min-height-small) {
-    @include border-radius(2px);
-
-    box-shadow: $modal-inset-box-shadow;
-    overflow: hidden;
-  }
-
   opacity: .01;
-
 }
diff --git a/core/src/components/modal/modal.scss b/core/src/components/modal/modal.scss
index 9510f46f9b..99d94c41eb 100644
--- a/core/src/components/modal/modal.scss
+++ b/core/src/components/modal/modal.scss
@@ -3,7 +3,25 @@
 // Modals
 // --------------------------------------------------
 
-ion-modal {
+:host {
+  /**
+   * @prop --background: Background of the modal content
+   * @prop --border-color: Border color of the modal content
+   * @prop --border-radius: Border radius of the modal content
+   * @prop --border-width: Border width of the modal content
+   * @prop --border-style: Border style of the modal content
+   * @prop --height: Height of the modal content
+   * @prop --width: Width of the modal content
+   */
+  --width: 100%;
+  --height: 100%;
+  --overflow: hidden;
+  --border-radius: 0;
+  --border-width: 0;
+  --border-style: none;
+  --border-color: transparent;
+  --background: #{$background-color};
+
   @include position(0, 0, 0, 0);
 
   display: flex;
@@ -15,32 +33,36 @@ ion-modal {
   contain: strict;
 }
 
-ion-modal-controller {
-  display: none;
-}
-
-
-@media not all and (min-width: $modal-inset-min-width) and (min-height: $modal-inset-min-height-small) {
-  ion-modal ion-backdrop {
-    display: none;
-  }
-}
-
 .modal-wrapper {
-  @media only screen and (min-width: $modal-inset-min-width) and (min-height: $modal-inset-min-height-small) {
-    width: $modal-inset-width;
-    height: $modal-inset-height-small;
-  }
+  @include border-radius(var(--border-radius));
 
-  @media only screen and (min-width: $modal-inset-min-width) and (min-height: $modal-inset-min-height-large) {
-    width: $modal-inset-width;
-    height: $modal-inset-height-large;
-  }
+  width: var(--width);
+  height: var(--height);
 
-  width: 100%;
-  height: 100%;
+  border-width: var(--border-width);
+  border-style: var(--border-style);
+  border-color: var(--border-color);
 
-  contain: strict;
+  background: var(--background);
+
+  overflow: var(--overflow);
   z-index: 10;
 }
 
+@media only screen and (min-width: $modal-inset-min-width) and (min-height: $modal-inset-min-height-small) {
+  :host {
+    --width: #{$modal-inset-width};
+    --height: #{$modal-inset-height-small};
+    --ion-safe-area-top: 0px;
+    --ion-safe-area-bottom: 0px;
+    --ion-safe-area-right: 0px;
+    --ion-safe-area-left: 0px;
+  }
+}
+
+@media only screen and (min-width: $modal-inset-min-width) and (min-height: $modal-inset-min-height-large) {
+  :host {
+    --width: #{$modal-inset-width};
+    --height: #{$modal-inset-height-large};
+  }
+}
diff --git a/core/src/components/modal/modal.tsx b/core/src/components/modal/modal.tsx
index c9309e1021..2da4ee967b 100644
--- a/core/src/components/modal/modal.tsx
+++ b/core/src/components/modal/modal.tsx
@@ -16,7 +16,8 @@ import { mdLeaveAnimation } from './animations/md.leave';
   styleUrls: {
     ios: 'modal.ios.scss',
     md: 'modal.md.scss'
-  }
+  },
+  scoped: true
 })
 export class Modal implements ComponentInterface, OverlayInterface {
 
@@ -29,6 +30,7 @@ export class Modal implements ComponentInterface, OverlayInterface {
 
   @Prop({ connect: 'ion-animation-controller' }) animationCtrl!: HTMLIonAnimationControllerElement;
   @Prop({ context: 'config' }) config!: Config;
+
   /** @internal */
   @Prop() overlayIndex!: number;
 
diff --git a/core/src/components/modal/readme.md b/core/src/components/modal/readme.md
index 2c6c43b241..cf27eabc19 100644
--- a/core/src/components/modal/readme.md
+++ b/core/src/components/modal/readme.md
@@ -156,6 +156,19 @@ Type: `Promise<void>`
 
 
 
+## CSS Custom Properties
+
+| Name              | Description                        |
+| ----------------- | ---------------------------------- |
+| `--background`    | Background of the modal content    |
+| `--border-color`  | Border color of the modal content  |
+| `--border-radius` | Border radius of the modal content |
+| `--border-style`  | Border style of the modal content  |
+| `--border-width`  | Border width of the modal content  |
+| `--height`        | Height of the modal content        |
+| `--width`         | Width of the modal content         |
+
+
 ----------------------------------------------
 
 *Built with [StencilJS](https://stenciljs.com/)*
diff --git a/core/src/components/modal/test/basic/index.html b/core/src/components/modal/test/basic/index.html
index 6ef7261f6a..0e31026fde 100644
--- a/core/src/components/modal/test/basic/index.html
+++ b/core/src/components/modal/test/basic/index.html
@@ -8,6 +8,15 @@
   <link href="../../../../../css/ionic.bundle.css" rel="stylesheet">
   <link href="../../../../../scripts/testing/styles.css" rel="stylesheet">
   <script src="../../../../../dist/ionic.js"></script>
+
+  <style>
+  :root {
+    --ion-safe-area-top: 20px;
+    --ion-safe-area-bottom: 20px;
+    --ion-safe-area-right: 20px;
+    --ion-safe-area-left: 20px;
+  }
+  </style>
 </head>
 
 <body>
diff --git a/core/src/components/modal/test/custom/e2e.ts b/core/src/components/modal/test/custom/e2e.ts
new file mode 100644
index 0000000000..9e80e6ad2d
--- /dev/null
+++ b/core/src/components/modal/test/custom/e2e.ts
@@ -0,0 +1,16 @@
+import { newE2EPage } from '@stencil/core/testing';
+
+test('modal: custom', async () => {
+  const page = await newE2EPage({
+    url: '/src/components/modal/test/custom?ionic:_testing=true'
+  });
+
+  await page.click('.e2ePresentModal');
+
+  const modal = await page.find('ion-modal');
+  await modal.waitForVisible();
+  await page.waitFor(250);
+
+  const compare = await page.compareScreenshot();
+  expect(compare).toMatchScreenshot();
+});
diff --git a/core/src/components/modal/test/custom/index.html b/core/src/components/modal/test/custom/index.html
new file mode 100644
index 0000000000..c139004b71
--- /dev/null
+++ b/core/src/components/modal/test/custom/index.html
@@ -0,0 +1,98 @@
+<!DOCTYPE html>
+<html dir="ltr">
+
+<head>
+  <meta charset="UTF-8">
+  <title>Modal - Basic</title>
+  <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
+  <link href="../../../../../css/ionic.bundle.css" rel="stylesheet">
+  <link href="../../../../../scripts/testing/styles.css" rel="stylesheet">
+  <script src="../../../../../dist/ionic.js"></script>
+
+  <style>
+  .custom-modal {
+    --height: 70%;
+    --border-style: solid;
+    --border-width: 7px 0 0 0;
+    --border-color: #0d51aa;
+    --border-radius: 20px 20px 0 0;
+    align-items: flex-end;
+  }
+  </style>
+</head>
+
+<body>
+  <ion-app>
+
+    <ion-header>
+      <ion-toolbar>
+        <ion-title>Modal - Basic</ion-title>
+      </ion-toolbar>
+    </ion-header>
+
+    <ion-content padding>
+      <p>
+        <ion-button id="presentModal" class="e2ePresentModal" onclick="presentModal()">Present modal</ion-button>
+      </p>
+    </ion-content>
+    <ion-modal-controller></ion-modal-controller>
+
+  </ion-app>
+
+  <script>
+
+    async function createModal() {
+      // initialize controller
+      const modalController = document.querySelector('ion-modal-controller');
+      await modalController.componentOnReady();
+
+      // create component to open
+      const element = document.createElement('div');
+      element.innerHTML = `
+      <ion-header>
+        <ion-toolbar>
+          <ion-title>Super Modal</ion-title>
+        </ion-toolbar>
+      </ion-header>
+      <ion-content>
+        <h1>Content of doom</h1>
+        <div>Here's some more content</div>
+        <ion-button class="dismiss">Dismiss Modal</ion-button>
+      </ion-content>
+      `;
+
+      // listen for close event
+      const button = element.querySelector('ion-button');
+      button.addEventListener('click', () => {
+        modalController.dismiss();
+      });
+
+      // present the modal
+      const modalElement = await modalController.create({
+        component: element,
+        cssClass: 'custom-modal',
+      });
+      return modalElement;
+    }
+
+    async function presentModal() {
+      const modal = await createModal();
+      await modal.present();
+    }
+    async function presentCloseModal() {
+      const modal = await createModal();
+      await modal.present();
+      await modal.dismiss();
+    }
+
+    async function presentCloseModal2() {
+      const modal = await createModal();
+      modal.present();
+      setTimeout(() => {
+        modal.dismiss();
+      }, 20);
+    }
+  </script>
+</body>
+
+</html>
diff --git a/core/src/components/modal/test/standalone/index.html b/core/src/components/modal/test/standalone/index.html
index eca8049f39..7d95c0f237 100644
--- a/core/src/components/modal/test/standalone/index.html
+++ b/core/src/components/modal/test/standalone/index.html
@@ -30,6 +30,11 @@
   </style>
 
   <script>
+    customElements.define('page-one', class extends HTMLElement {
+      connectedCallback() {
+        this.textContent = 'this is a modal';
+      }
+    });
     async function presentModal() {
       const modalController = document.querySelector('ion-modal-controller');
       await modalController.componentOnReady();