The Antminer S21 Hydro Thermal Grease Fixture is a precision silicone application tool engineered specifically for S21 Hydro hashboards. It guarantees even silicone-grease distribution across every hash board ASIC chip, preventing the overheating failures and performance degradation that follow uneven thermal paste coverage. Built from a high-grade steel mesh, the fixture is shop-floor durable and reusable across hundreds of maintenance cycles.
Over time, factory thermal grease deteriorates, causing poor heat transfer and reduced hash rate stability. This fixture lets a technician apply a fresh, uniform layer in a single pass — keeping ASIC chips cool, hash rate stable, and operating margins intact. It is a critical tool on any S21 Hydro repair bench where uniform thermal interface is the difference between a board that ships at full hash rate and one that keeps coming back.
Prevent ASIC Chip Overheating & Extend Your S21 Hydro's Lifespan
Original-compatible design for Antminer S21 Hydro hashboards.
Ensures even thermal paste coverage for efficient cooling across the full hashboard area.
Prevents ASIC chip failures caused by overheating.
Durable steel mesh construction for long-term workshop use.
Extends miner lifespan and maintains stable hash rates after every service.
S21 Hydro Maintenance Workflow
Bring the hashboard to a clean, level workstation. Clean the existing thermal compound from the heat-spreader and ASIC tops with isopropyl alcohol. Position the fixture over the hashboard so the apertures align with the chip array, apply silicone thermal grease across the surface, and pull cleanly with the squeegee. Lift the fixture vertically to leave even deposits on every chip. Reassemble the heat sink with the standard torque pattern and you are ready to retest. The same fixture is reusable across the full fleet, so a single tool covers a multi-rig refurbishment programme.
Antminer S21 Hydro Stencil Specifications
Feature
Details
Compatibility
Antminer S21 Hydro Hashboards
Material
High-grade steel mesh
Function
Even thermal grease application
Usage
Maintenance & thermal paste replacement
Key Benefit
Prevents ASIC chip overheating & extends miner life
Maintaining an S21 Hydro fleet across multiple sites? Email contact@lys-sz.com for fixture sets and bulk thermal-paste pricing. Worldwide shipping from our Shenzhen warehouse.
Shipping & Customs
🇺🇸🇪🇺 USA & European Union (DDP):
Orders are delivered DDP (Delivered Duty Paid). All customs duties, import taxes, and fees are included — no additional charges on delivery.
🌍 Rest of world:
Orders ship from China. Depending on your country, local customs authorities may apply import duties or taxes. Any such fees are set by your local authorities and are not included in the product price.
Get dedicated B2B pricing on this part and across our full catalog —
quote response within 24 hours, payment by T/T USD bank wire,
and DDP delivery available for US & EU customers (and other lanes on request).
Volume tiers
DDP for US & EU
T/T USD wire
24h response