{"id":4053,"date":"2026-03-04T09:09:20","date_gmt":"2026-03-04T09:09:20","guid":{"rendered":"https:\/\/hysfsubsea.com\/knowledge-base\/what-lubricant-should-i-use-on-underwater-connectors\/"},"modified":"2026-03-04T09:09:20","modified_gmt":"2026-03-04T09:09:20","slug":"what-lubricant-should-i-use-on-underwater-connectors","status":"publish","type":"knowledge-base","link":"https:\/\/hysfsubsea.com\/th\/knowledge-base\/what-lubricant-should-i-use-on-underwater-connectors\/","title":{"rendered":"What lubricant should I use on underwater connectors?"},"content":{"rendered":"

\u0e04\u0e33\u0e15\u0e2d\u0e1a\u0e2d\u0e22\u0e48\u0e32\u0e07\u0e23\u0e27\u0e14\u0e40\u0e23\u0e47\u0e27<\/h2>\n

Use silicone-based grease (Dow Corning 111 or equivalent) for O-rings. Never use petroleum-based products. Apply thin, even coat to O-rings only – not on electrical contacts. Reapply after each mating.<\/p>\n

\u0e04\u0e33\u0e15\u0e2d\u0e1a\u0e2d\u0e22\u0e48\u0e32\u0e07\u0e23\u0e27\u0e14\u0e40\u0e23\u0e47\u0e27<\/h2>\n

Use silicone-based grease<\/strong> (Dow Corning 111 or equivalent) for O-rings. Never use petroleum-based products<\/strong>. Apply thin, even coat to O-rings only – not on electrical contacts. Reapply after each mating.<\/p>\n

\u0e19\u0e49\u0e33\u0e21\u0e31\u0e19\u0e2b\u0e25\u0e48\u0e2d\u0e25\u0e37\u0e48\u0e19\u0e17\u0e35\u0e48\u0e41\u0e19\u0e30\u0e19\u0e33<\/h2>\n\n\n\n\n\n\n
Product<\/th>\nType<\/th>\n\u0e0a\u0e48\u0e27\u0e07\u0e2d\u0e38\u0e13\u0e2b\u0e20\u0e39\u0e21\u0e34<\/th>\n\u0e40\u0e2b\u0e21\u0e32\u0e30\u0e17\u0e35\u0e48\u0e2a\u0e38\u0e14\u0e2a\u0e33\u0e2b\u0e23\u0e31\u0e1a<\/th>\n<\/tr>\n
Dow Corning 111<\/td>\n\u0e0b\u0e34\u0e25\u0e34\u0e42\u0e04\u0e19<\/td>\n-40\u00b0C to +200\u00b0C<\/td>\nStandard O-rings<\/td>\n<\/tr>\n
Molykote 111<\/td>\n\u0e0b\u0e34\u0e25\u0e34\u0e42\u0e04\u0e19<\/td>\n-40\u00b0C to +200\u00b0C<\/td>\nEquivalent alternative<\/td>\n<\/tr>\n
Krytox GPL 226<\/td>\nPFPE<\/td>\n-40\u00b0C to +260\u00b0C<\/td>\nExtreme conditions<\/td>\n<\/tr>\n
Braycote 601<\/td>\nFluorinated<\/td>\n-73\u00b0C to +204\u00b0C<\/td>\nHigh performance<\/td>\n<\/tr>\n<\/table>\n

What NOT to Use<\/h2>\n
    \n
  • \u274c Petroleum jelly (Vaseline):<\/strong> Degrades rubber<\/li>\n
  • \u274c WD-40:<\/strong> Not a lubricant, damages seals<\/li>\n
  • \u274c Motor oil:<\/strong> Incompatible with O-ring materials<\/li>\n
  • \u274c Grease with additives:<\/strong> May cause swelling<\/li>\n
  • \u274c Dielectric grease:<\/strong> Can interfere with connections<\/li>\n<\/ul>\n

    Application Procedure<\/h2>\n
      \n
    1. Clean:<\/strong> Wipe O-ring and groove with clean cloth<\/li>\n
    2. Apply:<\/strong> Small amount of grease on fingertip<\/li>\n
    3. Spread:<\/strong> Thin, even coat on entire O-ring<\/li>\n
    4. \u0e15\u0e34\u0e14\u0e15\u0e31\u0e49\u0e07:<\/strong> Place O-ring in groove carefully<\/li>\n
    5. Wipe excess:<\/strong> Remove any grease on mating surfaces<\/li>\n<\/ol>\n

      Important Notes<\/h2>\n
        \n
      • Never lubricate electrical contacts<\/strong> – causes resistance<\/li>\n
      • Use sparingly<\/strong> – excess attracts contamination<\/li>\n
      • Reapply each time<\/strong> – grease washes off<\/li>\n
      • Store properly<\/strong> – keep grease container sealed<\/li>\n<\/ul>\n

        \u0e15\u0e34\u0e14\u0e15\u0e48\u0e2d\u0e40\u0e23\u0e32<\/h2>\n

        Maintenance questions:<\/strong> tech@hysfsubsea.com<\/p>","protected":false},"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"faq_category":[80],"class_list":["post-4053","knowledge-base","type-knowledge-base","status-publish","hentry","faq_category-installation-mating-guide"],"acf":[],"_links":{"self":[{"href":"https:\/\/hysfsubsea.com\/th\/wp-json\/wp\/v2\/knowledge-base\/4053","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hysfsubsea.com\/th\/wp-json\/wp\/v2\/knowledge-base"}],"about":[{"href":"https:\/\/hysfsubsea.com\/th\/wp-json\/wp\/v2\/types\/knowledge-base"}],"replies":[{"embeddable":true,"href":"https:\/\/hysfsubsea.com\/th\/wp-json\/wp\/v2\/comments?post=4053"}],"version-history":[{"count":0,"href":"https:\/\/hysfsubsea.com\/th\/wp-json\/wp\/v2\/knowledge-base\/4053\/revisions"}],"wp:attachment":[{"href":"https:\/\/hysfsubsea.com\/th\/wp-json\/wp\/v2\/media?parent=4053"}],"wp:term":[{"taxonomy":"faq_category","embeddable":true,"href":"https:\/\/hysfsubsea.com\/th\/wp-json\/wp\/v2\/faq_category?post=4053"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}