diff --git a/modules/product_kit/common.py b/modules/product_kit/common.py
index 8ca4476ff9..4f601cadd3 100644
--- a/modules/product_kit/common.py
+++ b/modules/product_kit/common.py
@@ -253,6 +253,9 @@ def order_line_component_mixin(prefix):
             domain=[
                 ('product.type', '=', 'kit'),
                 ])
+        line_state = fields.Function(
+            fields.Selection('get_line_states', "Line State"),
+            'on_change_with_line_state', searcher='search_line_state')
         moves = fields.One2Many('stock.move', 'origin', 'Moves', readonly=True)
         moves_ignored = fields.Many2Many(
             prefix + '.line.component-ignored-stock.move',
@@ -278,6 +281,21 @@ def order_line_component_mixin(prefix):
             super().__setup__()
             cls.__access__.add('line')
 
+        @classmethod
+        def get_line_states(cls):
+            pool = Pool()
+            Line = pool.get(f'{prefix}.line')
+            return getattr(Line, f'get_{prefix}_states')()
+
+        @fields.depends('line', f'_parent_line.{prefix}_state')
+        def on_change_with_line_state(self, name=None):
+            if self.line:
+                return getattr(self.line, f'{prefix}_state')
+
+        @classmethod
+        def search_line_state(cls, name, clause):
+            return [(f'line.{prefix}_state', *clause[1:])]
+
         @fields.depends('line', '_parent_line.product')
         def on_change_with_parent_type(self, name=None):
             if self.line and self.line.product:
diff --git a/modules/product_kit/purchase.py b/modules/product_kit/purchase.py
index f73e8b45ab..586ddd667d 100644
--- a/modules/product_kit/purchase.py
+++ b/modules/product_kit/purchase.py
@@ -7,6 +7,7 @@ from trytond.i18n import gettext
 from trytond.model import ModelSQL, ModelView, fields
 from trytond.modules.product import round_price
 from trytond.pool import Pool, PoolMeta
+from trytond.pyson import Eval
 from trytond.transaction import Transaction
 
 from .common import (
@@ -78,6 +79,17 @@ class LineComponent(
         ModelSQL, ModelView):
     __name__ = 'purchase.line.component'
 
+    @classmethod
+    def __setup__(cls):
+        super().__setup__()
+        states = {
+            'readonly': Eval('line_state') != 'draft',
+            }
+        cls.product.states = states
+        cls.quantity.states = states
+        cls.unit.states = states
+        cls.fixed.states = states
+
     def get_move(self, move_type):
         from trytond.modules.purchase.exceptions import PartyLocationError
         pool = Pool()
diff --git a/modules/product_kit/sale.py b/modules/product_kit/sale.py
index 5c82cf90ce..0177b4c9fd 100644
--- a/modules/product_kit/sale.py
+++ b/modules/product_kit/sale.py
@@ -4,6 +4,7 @@ from trytond.i18n import gettext
 from trytond.model import ModelSQL, ModelView, fields
 from trytond.modules.product import round_price
 from trytond.pool import Pool, PoolMeta
+from trytond.pyson import Eval
 from trytond.transaction import Transaction
 
 from .common import (
@@ -72,6 +73,17 @@ class LineComponent(
         ModelSQL, ModelView):
     __name__ = 'sale.line.component'
 
+    @classmethod
+    def __setup__(cls):
+        super().__setup__()
+        states = {
+            'readonly': Eval('line_state') != 'draft',
+            }
+        cls.product.states = states
+        cls.quantity.states = states
+        cls.unit.states = states
+        cls.fixed.states = states
+
     @property
     def warehouse(self):
         return self.line.warehouse