app/assets/stylesheets/material/base/_grid.scss in material-sass-4.0.0.alpha5 vs app/assets/stylesheets/material/base/_grid.scss in material-sass-4.0.0.alpha6

@@ -26,6 +26,17 @@
 //
   @if $enable-grid-classes {
     .row {
       @include make-row;
     }
+
+    .no-gutters {
+      margin-right: 0;
+      margin-left: 0;
+
+      > .col,
+      > [class*="col-"] {
+        padding-right: 0;
+        padding-left: 0;
+      }
+    }
   }