diff --git a/addons/product/static/src/product_catalog/kanban_record.xml b/addons/product/static/src/product_catalog/kanban_record.xml
index 83e43d941b0..219ae519618 100644
--- a/addons/product/static/src/product_catalog/kanban_record.xml
+++ b/addons/product/static/src/product_catalog/kanban_record.xml
@@ -8,7 +8,7 @@
              t-on-click="onGlobalClick"
              t-ref="root">
             <div class="d-flex flex-column h-100"
-                 t-att-class="{'o_product_added': productCatalogData.quantity || productCatalogData.readOnly}">
+                 t-att-class="{'o_product_added': productCatalogData.quantity}">
                 <t t-call="{{ templates[this.constructor.KANBAN_BOX_ATTRIBUTE] }}"
                    t-call-context="this.renderingContext"/>
                 <t t-component="orderLineComponent" productId="props.record.resId" t-props="productCatalogData"/>
diff --git a/addons/product/static/src/product_catalog/order_line/order_line.js b/addons/product/static/src/product_catalog/order_line/order_line.js
index d1363221a0d..78a7de40de8 100644
--- a/addons/product/static/src/product_catalog/order_line/order_line.js
+++ b/addons/product/static/src/product_catalog/order_line/order_line.js
@@ -9,7 +9,8 @@ export class ProductCatalogOrderLine extends Component {
         quantity: Number,
         price: Number,
         readOnly: { type: Boolean, optional: true },
-    }
+        warning: { type: String, optional: true},
+    };
 
     //--------------------------------------------------------------------------
     // Private
diff --git a/addons/product/static/src/product_catalog/order_line/order_line.xml b/addons/product/static/src/product_catalog/order_line/order_line.xml
index ead4e0ebc8c..9571e50b90b 100644
--- a/addons/product/static/src/product_catalog/order_line/order_line.xml
+++ b/addons/product/static/src/product_catalog/order_line/order_line.xml
@@ -6,10 +6,19 @@
         <t t-portal="`#product-${props.productId}-price`">
             <span class="o_product_catalog_price">Unit price: <t t-out="price"/></span>
         </t>
-        <span t-if="props.readOnly" class="my-2 pt-3 border-top">
+        <div 
+            t-if="props.readOnly and props.warning"
+            class="text-danger text-truncate my-2 pt-3 border-top">
+            <i class="fa fa-warning" t-att-title="props.warning"/>
+            <span 
+                class="px-1" 
+                t-att-title="props.warning"
+                t-out="props.warning"/>
+        </div>
+        <span t-elif="props.readOnly" class="my-2 pt-3 border-top" t-out="props.warning">
             You can't edit this product in the catalog.
         </span>
-        <div t-else="" class="d-flex justify-content-end">
+        <div t-else="" class="d-flex justify-content-end align-items-center">
             <div t-if="isInOrder()"
                     class="input-group o_product_catalog_quantity o_product_catalog_cancel_global_click w-50">
                 <button class="btn btn-primary border"
@@ -27,7 +36,16 @@
                     <i class="fa fa-plus"/>
                 </button>
             </div>
-            <div class="ms-auto o_product_catalog_buttons o_product_catalog_cancel_global_click">
+            <t t-elif="props.warning">
+                <i class="fa fa-warning text-warning" t-att-title="props.warning"/>
+                <span 
+                    class="text-truncate text-warning px-1" 
+                    t-att-title="props.warning"
+                    t-out="props.warning"/>
+            </t>
+            <div 
+                class="ms-auto o_product_catalog_buttons o_product_catalog_cancel_global_click"
+                style="min-width: max-content;">
                 <button t-if="!isInOrder()"
                         t-on-click.stop="() => this.env.addProduct()"
                         class="btn btn-secondary">
diff --git a/addons/purchase/models/purchase_order.py b/addons/purchase/models/purchase_order.py
index 0f701344515..b2575eb2888 100644
--- a/addons/purchase/models/purchase_order.py
+++ b/addons/purchase/models/purchase_order.py
@@ -869,6 +869,10 @@ class PurchaseOrder(models.Model):
                 'id': product.uom_id.id,
             },
         }
+        if product.purchase_line_warn_msg:
+            product_infos['warning'] = product.purchase_line_warn_msg
+        if product.purchase_line_warn == "block":
+            product_infos['readOnly'] = True
         if product.uom_id != product.uom_po_id:
             product_infos['purchase_uom'] = {
                 'display_name': product.uom_po_id.display_name,
diff --git a/addons/purchase/models/purchase_order_line.py b/addons/purchase/models/purchase_order_line.py
index e3cc9f9e6c6..17b0d5ba4f7 100644
--- a/addons/purchase/models/purchase_order_line.py
+++ b/addons/purchase/models/purchase_order_line.py
@@ -482,7 +482,8 @@ class PurchaseOrderLine(models.Model):
         the product is read-only or not.
 
         A product is considered read-only if the order is considered read-only (see
-        ``PurchaseOrder._is_readonly`` for more details) or if `self` contains multiple records.
+        ``PurchaseOrder._is_readonly`` for more details) or if `self` contains multiple records
+        or if it has purchase_line_warn == "block".
 
         Note: This method cannot be called with multiple records that have different products linked.
 
@@ -496,6 +497,7 @@ class PurchaseOrderLine(models.Model):
                 'uom': dict,
                 'purchase_uom': dict,
                 'packaging': dict,
+                'warning': String,
             }
         """
         if len(self) == 1:
diff --git a/addons/sale/models/sale_order.py b/addons/sale/models/sale_order.py
index c410b1abd14..e1b27b98861 100644
--- a/addons/sale/models/sale_order.py
+++ b/addons/sale/models/sale_order.py
@@ -1811,7 +1811,14 @@ class SaleOrder(models.Model):
             date=self.date_order,
             **kwargs,
         )
-        return {product_id: {'price': price} for product_id, price in pricelist.items()}
+        res = {}
+        for product in products:
+            res[product.id] = {'price': pricelist.get(product.id)}
+            if product.sale_line_warn_msg:
+                res[product.id]['warning'] = product.sale_line_warn_msg
+            if product.sale_line_warn == "block":
+                res[product.id]['readOnly'] = True
+        return res
 
     def _get_product_catalog_record_lines(self, product_ids):
         grouped_lines = defaultdict(lambda: self.env['sale.order.line'])
diff --git a/addons/sale/models/sale_order_line.py b/addons/sale/models/sale_order_line.py
index 2f56f5a8f94..8a36cbbf6c7 100644
--- a/addons/sale/models/sale_order_line.py
+++ b/addons/sale/models/sale_order_line.py
@@ -1194,7 +1194,8 @@ class SaleOrderLine(models.Model):
         the product is read-only or not.
 
         A product is considered read-only if the order is considered read-only (see
-        ``SaleOrder._is_readonly`` for more details) or if `self` contains multiple records.
+        ``SaleOrder._is_readonly`` for more details) or if `self` contains multiple records
+        or if it has sale_line_warn == "block".
 
         Note: This method cannot be called with multiple records that have different products linked.
 
@@ -1205,19 +1206,24 @@ class SaleOrderLine(models.Model):
                 'quantity': float,
                 'price': float,
                 'readOnly': bool,
+                'warning': String
             }
         """
         if len(self) == 1:
-            return {
+            res = {
                 'quantity': self.product_uom_qty,
                 'price': self.price_unit,
-                'readOnly': self.order_id._is_readonly(),
+                'readOnly': self.order_id._is_readonly() or (self.product_id.sale_line_warn == "block"),
+                'warning': self.product_id.sale_line_warn_msg,
             }
+            if self.product_id.sale_line_warn_msg:
+                res['warning'] = self.product_id.sale_line_warn_msg
+            return res
         elif self:
             self.product_id.ensure_one()
             order_line = self[0]
             order = order_line.order_id
-            return {
+            res = {
                 'readOnly': True,
                 'price': order.pricelist_id._get_product_price(
                     product=order_line.product_id,
@@ -1233,8 +1239,11 @@ class SaleOrderLine(models.Model):
                             to_unit=line.product_id.uom_id,
                         )
                     )
-                ),
+                )
             }
+            if self.product_id.sale_line_warn_msg:
+                res['warning'] = self.product_id.sale_line_warn_msg
+            return res
         else:
             return {
                 'quantity': 0,