diff --git a/src/libslic3r/GCode/CoolingBuffer.cpp b/src/libslic3r/GCode/CoolingBuffer.cpp
index 167dad0..f5befae 100644
--- a/src/libslic3r/GCode/CoolingBuffer.cpp
+++ b/src/libslic3r/GCode/CoolingBuffer.cpp
@@ -799,8 +799,12 @@ std::string CoolingBuffer::apply_layer_cooldown(
     auto change_extruder_set_fan = [this, layer_id, layer_time, &new_gcode, &bridge_fan_control, &bridge_fan_speed]() {
 #define EXTRUDER_CONFIG(OPT) m_config.OPT.get_at(m_current_extruder)
         int min_fan_speed = EXTRUDER_CONFIG(min_fan_speed);
-        //B15
-        int enable_auxiliary_fan = EXTRUDER_CONFIG(enable_auxiliary_fan);
+        //B15//Y26
+        int enable_auxiliary_fan;
+        if (m_config.opt_bool("seal_print"))
+            enable_auxiliary_fan = EXTRUDER_CONFIG(enable_auxiliary_fan);
+        else
+            enable_auxiliary_fan = EXTRUDER_CONFIG(enable_auxiliary_fan_unseal);
         //B25
         int enable_volume_fan = EXTRUDER_CONFIG(enable_volume_fan);
         int fan_speed_new = EXTRUDER_CONFIG(fan_always_on) ? min_fan_speed : 0;
diff --git a/src/libslic3r/Preset.cpp b/src/libslic3r/Preset.cpp
index b4d28c9..9e7b733 100644
--- a/src/libslic3r/Preset.cpp
+++ b/src/libslic3r/Preset.cpp
@@ -518,6 +518,8 @@ static std::vector<std::string> s_Preset_filament_options {
     "filament_vendor", "compatible_prints", "compatible_prints_condition", "compatible_printers", "compatible_printers_condition", "inherits",
     //B15
     "enable_auxiliary_fan",
+    //Y26
+    "enable_auxiliary_fan_unseal",
     //B24
     "volume_temperature",
     //B25
@@ -532,6 +534,8 @@ static std::vector<std::string> s_Preset_filament_options {
     "disable_rapid_cooling_fan_first_layers",
     //Y23
     "filament_shrink",
+    //Y26
+    "seal_print",
     //w15
     "filament_wipe_distance"
 };
diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index a2c056a..a758c1e 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -529,6 +529,13 @@ void PrintConfigDef::init_fff_params()
     def->max = 65;
     def->set_default_value(new ConfigOptionInts { 0 });
 
+//Y26
+    def = this->add("seal_print", coBool);
+    def->label = L("Seal");
+    def->tooltip = L("Sealing box printing will be more stable and reliable, but the heat dissipation of the model will be poor. "
+                   "Determine whether to unpack and print according to the actual situation.");
+    def->set_default_value(new ConfigOptionBool(true));
+
     def = this->add("before_layer_gcode", coString);
     def->label = L("Before layer change G-code");
     def->tooltip = L("This custom code is inserted at every layer change, right before the Z move. "
@@ -2199,15 +2206,24 @@ void PrintConfigDef::init_fff_params()
     def->mode = comExpert;
     def->set_default_value(new ConfigOptionBool(false));
 
-    //B15
+    //B15//Y26
     def = this->add("enable_auxiliary_fan", coInts);
-    def->label = L("Rapid Cooling Fan Speed");
-    def->tooltip = L("This setting represents the  PWM your rapid cooling fan needs to work.");
+    def->label = L("Seal");
+    def->tooltip = L("This setting represents the PWM your rapid cooling fan needs to work when the printing is sealing.");
     def->sidetext = L("%");
     def->min = 0;
     def->max = 100;
     def->mode = comExpert;
-    def->set_default_value(new ConfigOptionInts { 35 });
+    def->set_default_value(new ConfigOptionInts { 100 });
+
+    def = this->add("enable_auxiliary_fan_unseal", coInts);
+    def->label = L("Unseal");
+    def->tooltip = L("This setting represents the PWM your rapid cooling fan needs to work when the printing is unsealing.");
+    def->sidetext = L("%");
+    def->min = 0;
+    def->max = 100;
+    def->mode = comExpert;
+    def->set_default_value(new ConfigOptionInts { 0 });
 
     //B25
     def = this->add("enable_volume_fan", coInts);
diff --git a/src/libslic3r/PrintConfig.hpp b/src/libslic3r/PrintConfig.hpp
index 2be9e53..0ce1beb 100644
--- a/src/libslic3r/PrintConfig.hpp
+++ b/src/libslic3r/PrintConfig.hpp
@@ -837,6 +837,8 @@ PRINT_CONFIG_CLASS_DERIVED_DEFINE(
     ((ConfigOptionBool,               chamber_temperature))
     //B24
     ((ConfigOptionInts,               volume_temperature))
+    //Y26
+    ((ConfigOptionBool,               seal_print))
     ((ConfigOptionFloat,              bridge_acceleration))
     ((ConfigOptionInts,               bridge_fan_speed))
     ((ConfigOptionBools,              enable_dynamic_fan_speeds))
@@ -854,6 +856,8 @@ PRINT_CONFIG_CLASS_DERIVED_DEFINE(
     ((ConfigOptionInts,               enable_volume_fan))
     //B15
     ((ConfigOptionInts,               enable_auxiliary_fan))
+    //Y26
+    ((ConfigOptionInts,               enable_auxiliary_fan_unseal))
     ((ConfigOptionFloat,              default_acceleration))
     ((ConfigOptionInts,               disable_fan_first_layers))
     //B39
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index ff39a31..693ce6f 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -345,6 +345,8 @@ class FreqChangedParams : public OG_Settings
     wxButton*       m_wiping_dialog_button{ nullptr };
     wxSizer*        m_sizer {nullptr};
 
+//Y26
+    std::shared_ptr<ConfigOptionsGroup> m_og_filament;
     std::shared_ptr<ConfigOptionsGroup> m_og_sla;
     std::vector<ScalableButton*>        m_empty_buttons;
 public:
@@ -354,6 +356,8 @@ public:
     wxButton*       get_wiping_dialog_button() { return m_wiping_dialog_button; }
     wxSizer*        get_sizer() override;
     ConfigOptionsGroup* get_og(const bool is_fff);
+//Y26
+    ConfigOptionsGroup* get_og_filament();
     void            Show(const bool is_fff) override;
 
     void            msw_rescale();
@@ -363,12 +367,16 @@ public:
 void FreqChangedParams::msw_rescale()
 {
     m_og->msw_rescale();
+//Y26
+    m_og_filament->msw_rescale();
     m_og_sla->msw_rescale();
 }
 
 void FreqChangedParams::sys_color_changed()
 {
     m_og->sys_color_changed();
+//Y26
+    m_og_filament->sys_color_changed();
     m_og_sla->sys_color_changed();
 
     for (auto btn: m_empty_buttons)
@@ -624,8 +632,38 @@ FreqChangedParams::FreqChangedParams(wxWindow* parent) :
     choice = dynamic_cast<Choice*>(m_og_sla->get_field("pad"));
     choice->suppress_scroll();
 
+    //Y26
+    m_og_filament = std::make_shared<ConfigOptionsGroup>(parent, "");
+    DynamicPrintConfig* filament_config = &wxGetApp().preset_bundle->filaments.get_edited_preset().config;
+
+    m_og_filament->set_config(filament_config);
+    m_og_filament->hide_labels();
+
+    m_og_filament->m_on_change = [filament_config, this](t_config_option_key opt_key, boost::any value) {
+        Tab* tab_filament = wxGetApp().get_tab(Preset::TYPE_FILAMENT);
+        if (!tab_filament) return;
+
+        if (opt_key == "seal_print") {
+            tab_filament->update_dirty();
+            tab_filament->reload_config();
+            tab_filament->update();
+        }
+    };
+
+    line = Line { "", "" };
+
+    option = m_og_filament->get_option("seal_print");
+    option.opt.label = L("Seal");
+    line.append_option(option);
+    line.append_widget(empty_widget);
+
+    m_og_filament->append_line(line);
+    m_og_filament->activate();
+
     m_sizer = new wxBoxSizer(wxVERTICAL);
     m_sizer->Add(m_og->sizer, 0, wxEXPAND);
+//Y26
+    m_sizer->Add(m_og_filament->sizer, 0, wxEXPAND);
     m_sizer->Add(m_og_sla->sizer, 0, wxEXPAND);
 }
 
@@ -639,6 +677,8 @@ void FreqChangedParams::Show(const bool is_fff)
 {
     const bool is_wdb_shown = m_wiping_dialog_button->IsShown();
     m_og->Show(is_fff);
+//Y26
+    m_og_filament->Show(is_fff);
     m_og_sla->Show(!is_fff);
 
     // correct showing of the FreqChangedParams sizer when m_wiping_dialog_button is hidden
@@ -651,6 +691,12 @@ ConfigOptionsGroup* FreqChangedParams::get_og(const bool is_fff)
     return is_fff ? m_og.get() : m_og_sla.get();
 }
 
+//Y26
+ConfigOptionsGroup* FreqChangedParams::get_og_filament()
+{
+    return m_og_filament.get();
+}
+
 // Sidebar / private
 
 enum class ActionButtonType : int {
@@ -1328,6 +1374,12 @@ ConfigOptionsGroup* Sidebar::og_freq_chng_params(const bool is_fff)
     return p->frequently_changed_parameters->get_og(is_fff);
 }
 
+//Y26
+ConfigOptionsGroup* Sidebar::og_filament_chng_params()
+{
+    return p->frequently_changed_parameters->get_og_filament();
+}
+
 wxButton* Sidebar::get_wiping_dialog_button()
 {
     return p->frequently_changed_parameters->get_wiping_dialog_button();
@@ -5847,7 +5899,6 @@ void Plater::calib_pa_pattern(const double StartPA, double EndPA, double PAStep)
             }
         }
     }
-    gcode << "\n";
     gcode << "\nM107\nM106 P2 S0\nM106 P3 S0\n";
 
     auto pa_end_gcode = printer_config->opt_string("end_gcode");
diff --git a/src/slic3r/GUI/Plater.hpp b/src/slic3r/GUI/Plater.hpp
index f5c6186..1d6eca8 100644
--- a/src/slic3r/GUI/Plater.hpp
+++ b/src/slic3r/GUI/Plater.hpp
@@ -102,6 +102,8 @@ public:
     wxPanel*                presets_panel();
 
     ConfigOptionsGroup*     og_freq_chng_params(const bool is_fff);
+//Y26
+    ConfigOptionsGroup*     og_filament_chng_params();
     wxButton*               get_wiping_dialog_button();
     void                    update_objects_list_extruder_column(size_t extruders_count);
     void                    show_info_sizer();
diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index d7a3809..b0d54f7 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -1121,6 +1121,14 @@ void Tab::on_value_change(const std::string& opt_key, const boost::any& value)
         og_freq_chng_params->set_value("brim", val);
     }
 
+//Y26
+    if (opt_key == "seal_print")
+    {
+        ConfigOptionsGroup* og_filament_chng_params = wxGetApp().sidebar().og_filament_chng_params();
+        DynamicPrintConfig* filament_config = &wxGetApp().preset_bundle->filaments.get_edited_preset().config;
+        og_filament_chng_params->set_value("seal_print", filament_config->opt_bool("seal_print"));
+    }
+
     if (opt_key == "wipe_tower" || opt_key == "single_extruder_multi_material" || opt_key == "extruders_count" )
         update_wiping_button_visibility();
 
@@ -1410,6 +1418,18 @@ void Tab::update_frequently_changed_parameters()
     }
 }
 
+//Y26
+void Tab::update_frequently_filament_changed_parameters()
+{
+    ConfigOptionsGroup* og_filament_chng_params = wxGetApp().sidebar().og_filament_chng_params();
+    const bool is_fff = supports_printer_technology(ptFFF);
+
+    if (is_fff)
+    {
+        og_filament_chng_params->set_value("seal_print", m_config->opt_bool("seal_print"));
+    }
+}
+
 void TabPrint::build()
 {
     m_presets = &m_preset_bundle->prints;
@@ -2230,6 +2250,8 @@ void TabFilament::build()
         line.append_option(optgroup->get_option("first_layer_bed_temperature"));
         line.append_option(optgroup->get_option("bed_temperature"));
         optgroup->append_line(line);
+        //Y26
+        optgroup->append_single_option_line("seal_print");
         //B24
         optgroup->append_single_option_line("volume_temperature");
 
@@ -2254,9 +2276,11 @@ void TabFilament::build()
         optgroup->append_line(line);
 
         optgroup->append_single_option_line("bridge_fan_speed", category_path + "fan-settings");
-        //B15
-        // optgroup->append_single_option_line("auxiliary_fan_speed", category_path + "fan-settings");
-        optgroup->append_single_option_line("enable_auxiliary_fan", category_path + "fan-settings");
+        //B15//Y26
+        line = { L("Rapido Cooling Fan Speed"), "" };
+        line.append_option(optgroup->get_option("enable_auxiliary_fan"));
+        line.append_option(optgroup->get_option("enable_auxiliary_fan_unseal"));
+        optgroup->append_line(line);
         //B25
         optgroup->append_single_option_line("enable_volume_fan", category_path + "fan-settings");
         optgroup->append_single_option_line("disable_fan_first_layers", category_path + "fan-settings");
@@ -2441,14 +2465,23 @@ void TabFilament::toggle_options()
         bool dynamic_fan_speeds = m_config->opt_bool("enable_dynamic_fan_speeds", 0);
         for (int i = 0; i < 4; i++) {
         toggle_option("overhang_fan_speed_"+std::to_string(i),dynamic_fan_speeds);
-//Y16
+//Y16//Y26
         bool auxiliary_fan = printer_config->opt_bool("auxiliary_fan");
-        toggle_option("enable_auxiliary_fan", auxiliary_fan);
+        bool seal_print = m_config->opt_bool("seal_print");
+        toggle_option("enable_auxiliary_fan", auxiliary_fan && seal_print);
+        toggle_option("enable_auxiliary_fan_unseal", auxiliary_fan && !seal_print);
 
         bool chamber_fan = printer_config->opt_bool("chamber_fan");
         toggle_option("enable_volume_fan", chamber_fan);
 
-        int auxiliary_fan_speed = m_config->opt_int("enable_auxiliary_fan", 0);
+        int auxiliary_fan_speed;
+        if (seal_print && auxiliary_fan)
+            auxiliary_fan_speed = m_config->opt_int("enable_auxiliary_fan", 0);
+        else if (!seal_print && auxiliary_fan)
+            auxiliary_fan_speed = m_config->opt_int("enable_auxiliary_fan_unseal", 0);
+        else
+            auxiliary_fan_speed = 0;
+
         if (auxiliary_fan_speed == 0)
             toggle_option("disable_rapid_cooling_fan_first_layers", false);
         else
@@ -2478,9 +2511,14 @@ void TabFilament::toggle_options()
         bool pa = m_config->opt_bool("enable_advance_pressure", 0);
         toggle_option("advance_pressure", pa);
         toggle_option("smooth_time", pa);
-//Y16
-        bool chamber_temp = printer_config->opt_bool("chamber_temperature");
+//Y16//Y26
+        bool chamber_temp = printer_config->opt_bool("chamber_temperature") && m_config->opt_bool("seal_print");
         toggle_option("volume_temperature", chamber_temp);
+        if (!chamber_temp) {
+            DynamicPrintConfig new_conf = *m_config;
+            new_conf.set_key_value("volume_temperature", new ConfigOptionInts{0});
+            load_config(new_conf);
+        }
     }
 }
 
@@ -3802,6 +3840,9 @@ void Tab::load_current_preset()
             on_presets_changed();
             if (m_type == Preset::TYPE_SLA_PRINT || m_type == Preset::TYPE_PRINT)
                 update_frequently_changed_parameters();
+//Y26
+            else if (m_type == Preset::TYPE_FILAMENT)
+                update_frequently_filament_changed_parameters();
         }
 
         m_opt_status_value = (m_presets->get_selected_preset_parent() ? osSystemValue : 0) | osInitValue;
diff --git a/src/slic3r/GUI/Tab.hpp b/src/slic3r/GUI/Tab.hpp
index 618e9e4..804d476 100644
--- a/src/slic3r/GUI/Tab.hpp
+++ b/src/slic3r/GUI/Tab.hpp
@@ -410,6 +410,8 @@ protected:
 	void			build_preset_description_line(ConfigOptionsGroup* optgroup);
 	void			update_preset_description_line();
 	void			update_frequently_changed_parameters();
+//Y26
+	void			update_frequently_filament_changed_parameters();
 	void			fill_icon_descriptions();
 	void			set_tooltips_text();