{"product_id":"k-flex-st-self-seal-9mm","title":"K-Flex ST Self-Seal Pipe Insulation 9mm Wall","description":"\u003cp\u003e\u003cstrong\u003eK-FLEX ST Self-Seal insulation is the fastest way to insulate AC pipework — no adhesive required on the seam, clean finish every time.\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e✔ Self-seal — no adhesive needed on straight runs\u003c\/li\u003e\n\u003cli\u003e✔ Class O fire-rated insulation (Euroclass BL-s2, d0)\u003c\/li\u003e\n\u003cli\u003e✔ 2m lengths — fast installation on site\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhy Use Self-Seal Insulation?\u003c\/h3\u003e\u003cp\u003eSelf-seal insulation reduces installation time and eliminates adhesive on straight runs. This means faster installs, less mess on site, and consistent sealing across every job — especially valuable on larger or multi-unit installations where speed and finish quality matter.\u003c\/p\u003e\u003ch3\u003eWhere This Is Used\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eRefrigerant pipework on split system AC installations\u003c\/li\u003e\n\u003cli\u003eChilled water and cooling pipework\u003c\/li\u003e\n\u003cli\u003eDomestic and commercial HVAC systems\u003c\/li\u003e\n\u003cli\u003eAny application requiring fast, clean pipe insulation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eChoosing the Right Size\u003c\/h3\u003e\u003cp\u003eSelect pipe bore size to match your copper pipe OD, then choose wall thickness based on your application:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e9mm\u003c\/strong\u003e — tight spaces and short pipe runs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e13mm\u003c\/strong\u003e — standard AC installations (most common)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e19mm\u003c\/strong\u003e — refrigeration and low temperature systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25mm+\u003c\/strong\u003e — commercial and high-specification applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eK-FLEX vs Armaflex\u003c\/h3\u003e\u003cp\u003eK-FLEX ST offers the same Class O fire-rated performance as Armaflex, with a faster self-seal installation system and excellent value for trade use — making it a popular alternative for HVAC engineers across the UK. For underground or external pipe runs where waterproof protection is required, see our \u003ca href=\"\/products\/armaflex-evo-tuffcoat-underground-pipe-insulation-class-o-1m\"\u003eArmaflex EVO Tuffcoat underground insulation\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSelf-seal adhesive closure — fast, clean installation without separate adhesive on straight runs\u003c\/li\u003e\n\u003cli\u003eClosed-cell elastomeric foam — prevents condensation and moisture ingress\u003c\/li\u003e\n\u003cli\u003eClass O fire rating — Euroclass BL-s2, d0\u003c\/li\u003e\n\u003cli\u003eThermal conductivity as low as 0.031 W\/(m·K)\u003c\/li\u003e\n\u003cli\u003eService temperature range: -40°C to +85°C\u003c\/li\u003e\n\u003cli\u003eSupplied in 2m lengths\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eK-FLEX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eK-FLEX ST Self-Seal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2m per piece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eClosed-cell elastomeric foam (NBR\/PVC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFire Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eClass O (Euroclass BL-s2, d0)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThermal Conductivity (λ)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.031 W\/(m·K) at 0°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eService Temperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClosure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSelf-seal adhesive strip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColour\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eItaly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eEssential Accessories\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/installation-materials\"\u003eK-FLEX ST Tape\u003c\/a\u003e — seal joints, fittings and cut ends for a complete insulation system\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/installation-materials\"\u003eK-420 Adhesive\u003c\/a\u003e — for bends, tees and complex connections where self-seal is not sufficient\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eComplete Your Installation\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/copper-pipe-1\"\u003eAC Copper Pipe\u003c\/a\u003e — refrigerant-grade copper pipe for AC systems\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/pipe-supports-fixings-hangers\"\u003ePipe Supports \u0026amp; Fixings\u003c\/a\u003e — clips and brackets for securing insulated pipework\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/trunking-ducting\"\u003eTrunking \u0026amp; Cable Management\u003c\/a\u003e — for neat routing of pipework and cables\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/fittings-connectors\"\u003eFittings \u0026amp; Connectors\u003c\/a\u003e — refrigeration fittings for copper pipe\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eUsed With\u003c\/h3\u003e\u003cp\u003eK-FLEX ST Self-Seal insulation is installed over \u003ca href=\"\/collections\/copper-pipe-1\"\u003eAC copper pipe\u003c\/a\u003e after pressure testing and before final commissioning. Seal all joints and fittings with \u003ca href=\"\/collections\/installation-materials\"\u003eK-FLEX ST tape or K-420 adhesive\u003c\/a\u003e to complete the system. For underground or external runs, see \u003ca href=\"\/products\/armaflex-evo-tuffcoat-underground-pipe-insulation-class-o-1m\"\u003eArmaflex EVO Tuffcoat\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOrder K-FLEX ST Self-Seal pipe insulation today — available from UK stock with fast trade delivery.\u003c\/strong\u003e\u003c\/p\u003e","brand":"K-Flex","offers":[{"title":"22mm \/ 9mm","offer_id":57269971255673,"sku":"9022215603","price":3.78,"currency_code":"GBP","in_stock":true},{"title":"15mm \/ 9mm","offer_id":57269971288441,"sku":"9015215603","price":3.04,"currency_code":"GBP","in_stock":true},{"title":"28mm \/ 9mm","offer_id":57269971321209,"sku":"9028215603","price":4.2,"currency_code":"GBP","in_stock":true},{"title":"35mm \/ 9mm","offer_id":57269971353977,"sku":"9035215603","price":4.74,"currency_code":"GBP","in_stock":true},{"title":"42mm \/ 9mm","offer_id":57269971386745,"sku":"9042215603","price":5.5,"currency_code":"GBP","in_stock":true},{"title":"48mm \/ 9mm","offer_id":57269971419513,"sku":"9048215603","price":6.92,"currency_code":"GBP","in_stock":true},{"title":"54mm \/ 9mm","offer_id":57269971452281,"sku":"9054215603","price":7.92,"currency_code":"GBP","in_stock":true},{"title":"60mm \/ 9mm","offer_id":57269971485049,"sku":"9060215603","price":9.16,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/files\/K-FLEX-Self-Seal-Tube-Insulation-for-Quick-Clean-Install-Ryan-Air-Conditioning-Spares-68116285358455_d0e1bbec-bada-4eaa-8b23-90a7da4ba813.webp?v=1778740332","url":"https:\/\/www.airconspares.com\/products\/k-flex-st-self-seal-9mm","provider":"Airconspares.com","version":"1.0","type":"link"}