diff --git a/packages/core/src/render3/interfaces/renderer.ts b/packages/core/src/render3/interfaces/renderer.ts
index f2cd45492e..7f3b640090 100644
--- a/packages/core/src/render3/interfaces/renderer.ts
+++ b/packages/core/src/render3/interfaces/renderer.ts
@@ -16,6 +16,7 @@
  */
 
 import {RendererStyleFlags2, RendererType2} from '../../render/api';
+import {TrustedHTML, TrustedScript, TrustedScriptURL} from '../../util/security/trusted_type_defs';
 import {getDocument} from './document';
 
 // TODO: cleanup once the code is merged in angular/angular
@@ -80,7 +81,9 @@ export interface ProceduralRenderer3 {
   parentNode(node: RNode): RElement|null;
   nextSibling(node: RNode): RNode|null;
 
-  setAttribute(el: RElement, name: string, value: string, namespace?: string|null): void;
+  setAttribute(
+      el: RElement, name: string, value: string|TrustedHTML|TrustedScript|TrustedScriptURL,
+      namespace?: string|null): void;
   removeAttribute(el: RElement, name: string, namespace?: string|null): void;
   addClass(el: RElement, name: string): void;
   removeClass(el: RElement, name: string): void;
@@ -157,9 +160,11 @@ export interface RElement extends RNode {
   classList: RDomTokenList;
   className: string;
   textContent: string|null;
-  setAttribute(name: string, value: string): void;
+  setAttribute(name: string, value: string|TrustedHTML|TrustedScript|TrustedScriptURL): void;
   removeAttribute(name: string): void;
-  setAttributeNS(namespaceURI: string, qualifiedName: string, value: string): void;
+  setAttributeNS(
+      namespaceURI: string, qualifiedName: string,
+      value: string|TrustedHTML|TrustedScript|TrustedScriptURL): void;
   addEventListener(type: string, listener: EventListener, useCapture?: boolean): void;
   removeEventListener(type: string, listener?: EventListener, options?: boolean): void;
 
diff --git a/packages/core/src/render3/interfaces/sanitization.ts b/packages/core/src/render3/interfaces/sanitization.ts
index 886ff809c9..3ebbb7c35a 100644
--- a/packages/core/src/render3/interfaces/sanitization.ts
+++ b/packages/core/src/render3/interfaces/sanitization.ts
@@ -6,7 +6,10 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
+import {TrustedHTML, TrustedScript, TrustedScriptURL} from '../../util/security/trusted_type_defs';
+
 /**
  * Function used to sanitize the value before writing it into the renderer.
  */
-export type SanitizerFn = (value: any, tagName?: string, propName?: string) => string;
+export type SanitizerFn = (value: any, tagName?: string, propName?: string) =>
+    string|TrustedHTML|TrustedScript|TrustedScriptURL;
diff --git a/packages/core/src/sanitization/sanitization.ts b/packages/core/src/sanitization/sanitization.ts
index 49b151a1e0..2be379e468 100644
--- a/packages/core/src/sanitization/sanitization.ts
+++ b/packages/core/src/sanitization/sanitization.ts
@@ -36,7 +36,7 @@ import {_sanitizeUrl as _sanitizeUrl} from './url_sanitizer';
  *
  * @codeGenApi
  */
-export function ɵɵsanitizeHtml(unsafeHtml: any): string {
+export function ɵɵsanitizeHtml(unsafeHtml: any): TrustedHTML|string {
   const sanitizer = getSanitizer();
   if (sanitizer) {
     return sanitizer.sanitize(SecurityContext.HTML, unsafeHtml) || '';
@@ -107,7 +107,7 @@ export function ɵɵsanitizeUrl(unsafeUrl: any): string {
  *
  * @codeGenApi
  */
-export function ɵɵsanitizeResourceUrl(unsafeResourceUrl: any): string {
+export function ɵɵsanitizeResourceUrl(unsafeResourceUrl: any): TrustedScriptURL|string {
   const sanitizer = getSanitizer();
   if (sanitizer) {
     return sanitizer.sanitize(SecurityContext.RESOURCE_URL, unsafeResourceUrl) || '';
@@ -130,7 +130,7 @@ export function ɵɵsanitizeResourceUrl(unsafeResourceUrl: any): string {
  *
  * @codeGenApi
  */
-export function ɵɵsanitizeScript(unsafeScript: any): string {
+export function ɵɵsanitizeScript(unsafeScript: any): TrustedScript|string {
   const sanitizer = getSanitizer();
   if (sanitizer) {
     return sanitizer.sanitize(SecurityContext.SCRIPT, unsafeScript) || '';