{"product_id":"antminer-s21-plus-thermal-grease-steel-mesh-stencil","title":"Antminer S21+ (Plus) Thermal Grease Steel Mesh Stencil","description":"\u003ch2\u003eAntminer S21+ (Plus) Thermal Grease Steel Mesh Stencil – Laser-Cut 3-Layer Hashboard Silicone Application Tool\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003ethermal grease steel mesh stencil\u003c\/strong\u003e is engineered for the \u003cstrong\u003eAntminer S21+ (Plus)\u003c\/strong\u003e air-cooled hashboard. It features a \u003cstrong\u003ethree-layer design — Left, Right and BOT\u003c\/strong\u003e — perfectly matched to the S21+ hashboard ASIC chip array through a \u003cstrong\u003eprecision laser-cutting process\u003c\/strong\u003e. The mesh lets a technician control both the \u003cstrong\u003eposition\u003c\/strong\u003e and the \u003cstrong\u003ethickness\u003c\/strong\u003e of the silicone thermal grease layer, so every ASIC chip receives an even, repeatable deposit that improves chip-to-heatsink heat conduction and lifts steady-state hash-rate stability. Available as \u003cstrong\u003eLeft + Right stencils, BOT stencil alone, or the Full Kit (all three layers)\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eThree-Layer Design — Left, Right \u0026amp; BOT\u003c\/h3\u003e\n\u003cp\u003eThe S21+ hashboard ASIC array doesn't sit as a single flat zone — it splits across distinct regions, and a single one-size mesh almost never aligns cleanly across all of them. This stencil set addresses that geometry directly with \u003cstrong\u003ethree matched layers\u003c\/strong\u003e: the \u003cstrong\u003eLeft and Right stencils\u003c\/strong\u003e handle the side chip arrays, and the \u003cstrong\u003eBOT stencil\u003c\/strong\u003e handles the bottom chip array. Each layer is laser-cut to its own footprint, so the apertures sit exactly over the chips they are meant to cover. The Full Kit gives complete hashboard coverage; the Left + Right or BOT options let a repair shop replace only the section it actually uses on a given workflow.\u003c\/p\u003e\n\u003ch3\u003eWhy Steel Mesh Beats Manual Application\u003c\/h3\u003e\n\u003cp\u003eManual thermal grease application is the single biggest source of post-repair temperature variance on a S21+ hashboard: thick on one chip, thin on the next, smears bridging onto neighbouring components. Using a steel mesh enforces a \u003cstrong\u003euniform deposit across the full chip array in a single pull\u003c\/strong\u003e — more uniform, faster, and with significantly higher coverage of the chip top surface than freehand greasing. The downstream effect is straightforward: better thermal interface → better heat dissipation → lower ASIC temperatures → fewer thermal-throttling events and a hash rate that holds at spec instead of decaying.\u003c\/p\u003e\n\u003ch3\u003eLaser-Cut Precision for S21+ Hashboard ASIC Layout\u003c\/h3\u003e\n\u003cp\u003eThe apertures are produced by \u003cstrong\u003eprecision laser cutting\u003c\/strong\u003e, not stamping — laser-cut edges release silicone cleanly without the residual smear stamped meshes leave behind, and the hole geometry stays inside tight tolerance to the S21+ chip footprint. The result on a refurbished hashboard: \u003cstrong\u003econtrolled grease thickness, uniform coverage of the chip top, and no over-application onto the surrounding board\u003c\/strong\u003e, which keeps voltage rails and signal lines clean.\u003c\/p\u003e\n\u003ch3\u003eChoose Your Configuration\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eLeft + Right Stencil\u003c\/strong\u003e — for refurbishment work that only touches the two side chip arrays (most common partial-rebuild scenario). \u003cstrong\u003eBOT Stencil\u003c\/strong\u003e — when the bottom array is the only section being re-greased. \u003cstrong\u003eFull Kit (Left + Right + BOT)\u003c\/strong\u003e — for a complete hashboard rebuild, new-miner commissioning, or any repair shop building out a permanent S21+ bench setup. Spare layers are easy to add later if a single stencil sees heavy wear before the others.\u003c\/p\u003e\n\u003ch3\u003eApplication Workflow\u003c\/h3\u003e\n\u003cp\u003ePower off the miner and let the hashboard cool before disassembly. Strip the existing thermal compound from the chip tops and the heatsink contact surface with isopropanol and a lint-free wipe. Position the relevant stencil (Left, Right or BOT) over the matching chip array, dispense silicone thermal grease across the surface, and pull cleanly with a flat scraper or squeegee. Lift the stencil straight up — do not slide — to leave even gel deposits on every chip. Repeat for each layer of the array if you are running the Full Kit. Lower the heatsink straight down onto the chips and clamp at the recommended torque before re-energising the miner.\u003c\/p\u003e\n\u003ch3\u003eImportant Notes — Compatibility, Storage \u0026amp; TIM Choice\u003c\/h3\u003e\n\u003cp\u003eThis stencil set is \u003cstrong\u003ecompatible only with the Antminer S21+ (Plus)\u003c\/strong\u003e air-cooled hashboard. It is \u003cstrong\u003enot compatible\u003c\/strong\u003e with the S21+ Hydro, the S21 Pro, the S21 XP, the S21 Hydro or any other S-series variant — the chip-and-heatsink footprint differs and aperture misalignment would destroy the benefit of the laser-cut precision. For best results, pair the stencil with a \u003cstrong\u003ehigh-conductivity silicone thermal grease (≥6 W\/m·K is the standard recommendation for dense ASIC hashboards)\u003c\/strong\u003e; an 8 W\/mK silicone gel is the recommended class for this hashboard density. The stencil is a precision tool: \u003cstrong\u003ehandle without bending, store flat in a dry, dust-free environment\u003c\/strong\u003e, and clean residual grease off after every session to keep aperture geometry sharp.\u003c\/p\u003e\n\u003ch4\u003eAntminer S21+ Thermal Grease Steel Mesh Specifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eProduct\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eThermal Grease Steel Mesh Stencil – Antminer S21+ (Plus)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eSteel mesh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eManufacturing Process\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003ePrecision laser cutting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eDesign\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003e3-layer set: Left, Right, BOT — each matched to its hashboard section\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eVariants Available\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eLeft + Right stencil \/ BOT stencil \/ Full Kit (all three)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eCompatibility\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eAntminer S21+ (Plus) air-cooled hashboard \u003cstrong\u003eonly\u003c\/strong\u003e — not for S21+ Hydro, S21, S21 Pro, S21 XP, S21 Hydro or S21 XP Hydro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eApplication\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eControlled-thickness silicone grease deposit on hashboard ASIC chip array\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eRecommended TIM\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eSilicone thermal grease ≥6 W\/m·K (8 W\/mK silicone gel preferred)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eReusability\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eYes — wash and dry between sessions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eUse Cases\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eHashboard repair \/ refurbishment, new-miner commissioning, periodic TIM refresh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eStorage\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eDry, dust-free, lay flat — avoid bending or sharp scratches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eCondition\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eRelated Antminer S21+ Parts \u0026amp; Thermal Tools\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/bitmain-bm1370bc-asic-chip-antminer-s21pro-s21xp-s21hydro\"\u003eBM1370BC ASIC Chip – Antminer S21+ \/ S21 Pro \/ S21 XP\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/martech-12v-5a-7000rpm-cooling-fan-14cm-antminer-s21pro-crypto-miner\"\u003eMartech 14cm 7000 RPM Cooling Fan – S21 Pro \/ S21+\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/dowsil-8w-blue-thermal-gel-1kg-asic-miner-hashboards\"\u003eDOWSIL TC-3080 8W\/mK Blue Thermal Gel 1kg – Recommended TIM\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/antminer-s21-hyd-thermal-grease-stencil-stainless-steel-positioning-frame\"\u003eAntminer S21+ Hyd Thermal Grease Stencil – Hydro Sister Tool\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRefurbishing a fleet of S21+ miners or kitting out a repair bench? \u003ca href=\"mailto:contact@lys-sz.com\"\u003eContact us at contact@lys-sz.com\u003c\/a\u003e for kit pricing and bulk thermal-grease orders. Worldwide shipping from our Shenzhen warehouse.\u003c\/p\u003e","brand":"LYS Shenzhen","offers":[{"title":"Left + Right stencil","offer_id":45501370138803,"sku":null,"price":94.0,"currency_code":"USD","in_stock":true},{"title":"BOT Stencil","offer_id":45501370171571,"sku":null,"price":54.0,"currency_code":"USD","in_stock":true},{"title":"Full kit (Left+Right+BOT Stencil)","offer_id":45501370204339,"sku":null,"price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6710\/4179\/files\/antminer-s21-plus-thermal-grease-stencil-left-right-layers.webp?v=1778562974","url":"https:\/\/lys-sz.com\/products\/antminer-s21-plus-thermal-grease-steel-mesh-stencil","provider":"LYS Shenzhen","version":"1.0","type":"link"}