Antminer S21 Silicone Grease Application Tin Tool for Thermal Paste (Left+Right)

Antminer S21 Thermal Paste Application Stencil – Left & Right Hashboard Set

Uneven thermal paste on an Antminer S21 hashboard leads to hot spots, throttled hash rate, and premature chip failure. This precision stencil set (left + right) sits over the ASIC chip array and guides silicone grease into a perfectly uniform layer — giving every chip consistent thermal contact with the heatsink and maximising cooling efficiency.

Precision Application for Chip Installation & Heatsink Upgrades

Whether you are re-pasting after a chip replacement, converting to water cooling, or performing scheduled maintenance, the stencil eliminates the guesswork of manual paste spreading. Place the stencil, apply grease with a scraper, lift — done. The result is a controlled, repeatable layer thickness across the entire board, which is critical when working at the scale of a mining farm where dozens of S21 boards pass through the bench each week.

Complete Left & Right Coverage

The S21 hashboard has two distinct chip zones. This set includes both the left and right stencils so you can paste the full board in one session without improvising jigs or taping off sections. Each stencil is CNC-machined to match the S21 chip layout precisely.

S21 Thermal Paste Stencil Specifications

Related S21 Thermal & Repair Tools

• S21 Hydro Thermal Grease Fixture
• S21 Pro Thermal Paste Application Tool
• S21 Hydro Silicone Grease Fixture
• G19 8W Blue Thermal Gel 1 kg for S21

Re-pasting a fleet of S21 boards? Contact us at contact@lys-sz.com for stencil sets and thermal compound bundles.

Worldwide shipping from our Shenzhen warehouse.