BoPin 770 High Temperature Silicone Sealant

Product Description

Specialized heat-resistant acetoxy silicone engineered to withstand extreme temperatures up to 300°C. Ideal for heating systems, automotive applications, and industrial installations requiring thermal stability and gas-tight seals.

Colour

Black

Custom

Extreme Temperature Resistance: Maintains properties from -40°C to +300°C
Thermal Cycling Stability: Remains flexible after repeated heating and cooling
Excellent Adhesion: Strong bonding to metals, glass, and ceramic surfaces
Non-Sagging Formula: Perfect for vertical and overhead applications
Fast Initial Curing: Forms skin within 8-15 minutes for quicker project completion
Vibration Resistant: Maintains seal integrity in equipment with movement or vibration

Application

Heating system connections and flues
Stove, oven, and fireplace sealing
HVAC ducting and components
Industrial equipment operating at high temperatures
Automotive gasket making and sealing
Heat exchanger and boiler sealing

Applicable Materials

Metals (steel, aluminum, cast iron)
Glass and ceramics
Engineered composites
Heat-resistant plastics
Enamelware
Fiberglass insulation materials

Package

300ml cartridge (12 units per box)

其他信息

Base Material	Acetoxy silicone
Curing System	Acetoxy cure (moisture curing)
Density	1.04 g/cm³
Hardness (Shore A)	25±5
Elongation at Break	>400%
Movement Capability	±20%
Temperature Resistance	-40°C to +300°C
Application Temperature	+5°C to +40°C
Skin Formation Time	8-15 minutes (23°C/50% RH)
Curing Time	2-3mm/24 hours (23°C/50% RH)
Shelf Life	12 months (unopened, stored properly)
Color	Black

Surface Preparation:

Surfaces must be clean, dry, and free from dust, grease, and old sealant residues
For metals, cleaning with acetone or alcohol is recommended
Ensure surface is completely dry before application

Application Method:

Cut cartridge tip at desired angle and diameter
Apply with even pressure, ensuring complete joint filling
Tool immediately (within 5 minutes) if necessary
For best results in high-temperature applications, allow to fully cure at room temperature before exposing to heat

Joint Design:

For high-temperature applications, design joint width to account for thermal expansion
Use mineral wool or ceramic fiber backing material for high-temperature applications
Minimum joint width: 6mm
Maximum joint width: 25mm
Optimal width-to-depth ratio: 2:1

Limitation

Not suitable for continuous immersion in water or permanently wet areas
May not adhere well to alkaline surfaces like concrete without primer
Not recommended for oxygen systems due to potential oxidation
Contains acetic acid during curing; may corrode sensitive metals
Not suitable for PE, PP, Teflon, and bituminous surfaces

Application

For best results, allow sealant to cure completely at room temperature before exposing to high heat
In extreme temperature applications, gradual initial heating is recommended
For optimal adhesion to metals, light abrasion followed by solvent cleaning can improve results
Acetoxy formula releases acetic acid during curing – ensure adequate ventilation
Red color provides visual confirmation in heating system applications

Main Benefits

Application & Package

Application

Heating system connections and flues
Stove, oven, and fireplace sealing
HVAC ducting and components
Industrial equipment operating at high temperatures
Automotive gasket making and sealing
Heat exchanger and boiler sealing

Applicable Materials

Metals (steel, aluminum, cast iron)
Glass and ceramics
Engineered composites
Heat-resistant plastics
Enamelware
Fiberglass insulation materials

Package

300ml cartridge (12 units per box)

Technical Specifications

其他信息

Base Material	Acetoxy silicone
Curing System	Acetoxy cure (moisture curing)
Density	1.04 g/cm³
Hardness (Shore A)	25±5
Elongation at Break	>400%
Movement Capability	±20%
Temperature Resistance	-40°C to +300°C
Application Temperature	+5°C to +40°C
Skin Formation Time	8-15 minutes (23°C/50% RH)
Curing Time	2-3mm/24 hours (23°C/50% RH)
Shelf Life	12 months (unopened, stored properly)
Color	Black

Usage Instructions

Surface Preparation:

Surfaces must be clean, dry, and free from dust, grease, and old sealant residues
For metals, cleaning with acetone or alcohol is recommended
Ensure surface is completely dry before application

Application Method:

Cut cartridge tip at desired angle and diameter
Apply with even pressure, ensuring complete joint filling
Tool immediately (within 5 minutes) if necessary
For best results in high-temperature applications, allow to fully cure at room temperature before exposing to heat

Joint Design:

For high-temperature applications, design joint width to account for thermal expansion
Use mineral wool or ceramic fiber backing material for high-temperature applications
Minimum joint width: 6mm
Maximum joint width: 25mm
Optimal width-to-depth ratio: 2:1

Limitation & Tips

Limitation

Not suitable for continuous immersion in water or permanently wet areas
May not adhere well to alkaline surfaces like concrete without primer
Not recommended for oxygen systems due to potential oxidation
Contains acetic acid during curing; may corrode sensitive metals
Not suitable for PE, PP, Teflon, and bituminous surfaces

Tips

For best results, allow sealant to cure completely at room temperature before exposing to high heat
In extreme temperature applications, gradual initial heating is recommended
For optimal adhesion to metals, light abrasion followed by solvent cleaning can improve results
Acetoxy formula releases acetic acid during curing – ensure adequate ventilation
Red color provides visual confirmation in heating system applications