{"product_id":"antminer-s21xp-hydro-silicone-grease-stencil-stainless-steel-precision-tool","title":"Antminer S21XP Hydro Silicone Grease Stencil – Stainless Steel Precision Tool","description":"\u003ch2\u003eAntminer S21XP Hydro Silicone Grease Stencil – Stainless Steel 1:1 Precision Thermal Paste Application Tool\u003c\/h2\u003e\n\u003cp\u003eThis is a dedicated \u003cstrong\u003esilicone grease stencil\u003c\/strong\u003e for the \u003cstrong\u003eAntminer S21XP Hydro\u003c\/strong\u003e miner. The mold is designed with \u003cstrong\u003e1:1 hole positions that replicate the original Bitmain specification\u003c\/strong\u003e, so the apertures sit directly over each ASIC chip on the hashboard and over every contact zone on the matching heatsink module. Made from \u003cstrong\u003ehigh-quality stainless steel\u003c\/strong\u003e with \u003cstrong\u003esmooth, burr-free edges\u003c\/strong\u003e, the stencil delivers a uniform thermal paste layer in a single pull — precisely on the heat-dissipation areas that matter, with no smearing onto adjacent components and no risk of scratching the chip top or heatsink surface. It is the right tool for \u003cstrong\u003enew S21XP Hydro installations, thermal paste refresh and full cooling-system optimisation\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhy a Dedicated S21XP Hydro Stencil\u003c\/h3\u003e\n\u003cp\u003eGeneric stencils almost always come with the wrong aperture spacing for the S21XP Hydro hashboard. The result is misaligned coverage, uneven coat thickness, and grease pushed onto components that should stay clean. Those errors translate into \u003cstrong\u003eair bubbles in the heat-dissipation gap, reduced thermal conduction between chip and heatsink, higher operating temperatures, and ultimately hash-rate decay or thermal shutdown\u003c\/strong\u003e. A 1:1 stencil eliminates that whole failure chain by matching the OEM chip-and-heatsink geometry exactly.\u003c\/p\u003e\n\u003ch3\u003e1:1 Hole Positions — Precision Match to OEM Spec\u003c\/h3\u003e\n\u003cp\u003eThe stencil's \u003cstrong\u003ehole size and spacing are optimised for heat dissipation\u003c\/strong\u003e on the S21XP Hydro chip array. Every aperture is positioned to deposit grease only where chip-to-heatsink contact actually occurs, with thickness controlled so that the joint is full but not overfilled. The result on a refurbished hashboard: \u003cstrong\u003euniform coating thickness, reduced air entrapment, better heat conduction efficiency, and lower steady-state chip temperatures\u003c\/strong\u003e — which is what keeps a hydro miner at full hash rate over months of duty cycling instead of slowly drifting under thermal stress.\u003c\/p\u003e\n\u003ch3\u003eBurr-Free Stainless Steel for Safe Repeated Use\u003c\/h3\u003e\n\u003cp\u003eThe stencil is fabricated from \u003cstrong\u003ehigh-quality stainless steel\u003c\/strong\u003e: corrosion-resistant against coolant residue and isopropyl-alcohol cleanups, and \u003cstrong\u003enot easily deformed\u003c\/strong\u003e by repeated handling. Critically, the aperture edges are finished \u003cstrong\u003esmooth and burr-free\u003c\/strong\u003e, so the stencil cannot mark the ASIC chip tops or score the polished heatsink contact surface during alignment. Aperture geometry stays sharp run after run, and the stencil washes clean for the next session without warping.\u003c\/p\u003e\n\u003ch3\u003eWhen to Use This Stencil\u003c\/h3\u003e\n\u003cp\u003eThree workflows on the S21XP Hydro call for it: \u003cstrong\u003e(1) installing a new miner\u003c\/strong\u003e where a fresh, factory-equivalent thermal interface is the right starting point, \u003cstrong\u003e(2) replacing or refreshing thermal paste\u003c\/strong\u003e after months of duty cycling have caused pump-out, dry-out or migration of the original layer, and \u003cstrong\u003e(3) upgrading or optimising the cooling system\u003c\/strong\u003e — for example after a water-cooling plate change, a coolant-loop service, or a deliberate thermal-headroom upgrade ahead of a firmware over-clock.\u003c\/p\u003e\n\u003ch3\u003eApplication Workflow\u003c\/h3\u003e\n\u003cp\u003ePower off the miner and depressurise the cooling loop before disassembly. Strip the existing thermal compound from the hashboard chip tops and the water-cooling plate contact surface using isopropanol and a lint-free wipe. Position the stencil over the hashboard so the 1:1 apertures register cleanly with the chip array, dispense your thermal grease across the surface, and pull in one steady motion with a flat scraper or squeegee. Lift the stencil straight up — do not slide — to leave even gel deposits on every chip without smearing. Lower the water-cooling plate straight down onto the chips and clamp at the recommended torque. Re-pressurise the loop, check for leaks, and only then re-energise the miner.\u003c\/p\u003e\n\u003ch3\u003eImportant Notes — Compatibility, Storage \u0026amp; TIM Choice\u003c\/h3\u003e\n\u003cp\u003eThis stencil is \u003cstrong\u003ecompatible only with the Antminer S21XP Hydro\u003c\/strong\u003e. The chip-pattern and heatsink footprint differ from the air-cooled S21XP, the S21 Hydro and the S21+ Hydro, so do not attempt to use it on those models — aperture misalignment will destroy the whole benefit of a 1:1 stencil. For best results, pair the stencil with a \u003cstrong\u003ehigh-conductivity 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 hydro 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 S21XP Hydro Silicone Grease Stencil 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;\"\u003eSilicone Grease Stencil – Antminer S21XP Hydro\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;\"\u003eHigh-quality stainless steel, corrosion-resistant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eEdge Finish\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eSmooth, burr-free — chip and heatsink safe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eAperture Layout\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003e1:1 with original Bitmain S21XP Hydro chip-and-heatsink positions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eHole Geometry\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eSize and spacing optimised for uniform heat-dissipation coverage\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 S21XP Hydro \u003cstrong\u003eonly\u003c\/strong\u003e — not for air-cooled S21XP, S21 Hydro or S21+ Hydro\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; geometry preserved over many cycles\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;\"\u003eNew miner install, thermal paste replacement, cooling-system upgrade \/ optimisation\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 S21XP Hydro 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 – S21 Pro \/ S21 XP \/ S21+ \/ S21 Hydro\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/apw11-psu-water-cooling-plate-bitmain-antminer-s21xp-s19xphydro\"\u003eAPW11 PSU Water Cooling Plate – S21XP \/ S19XP Hydro\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-hydro-thermal-grease-fixture-precision-silicone-application-tool\"\u003eAntminer S21 Hydro Thermal Grease Fixture – Sister Tool\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRefurbishing a fleet of S21XP Hydro miners or commissioning new units? \u003ca href=\"mailto:contact@lys-sz.com\"\u003eContact us at contact@lys-sz.com\u003c\/a\u003e for stencil sets and bulk thermal-grease pricing. Worldwide shipping from our Shenzhen warehouse.\u003c\/p\u003e","brand":"LYS Shenzhen","offers":[{"title":"Default Title","offer_id":45497890537651,"sku":null,"price":49.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6710\/4179\/files\/antminer-s21xp-hydro-stencil-thermal-grease-application-hashboard.webp?v=1778302764","url":"https:\/\/lys-sz.com\/products\/antminer-s21xp-hydro-silicone-grease-stencil-stainless-steel-precision-tool","provider":"LYS Shenzhen","version":"1.0","type":"link"}