{"title":"Silicone End Caps","description":"\u003cp\u003eSilicone end caps and blanking caps, reinforced and unreinforced.\u003c\/p\u003e","products":[{"product_id":"silicone-reinforced-blanking-cap","title":"Silicone Reinforced Blanking Cap","description":"\u003cp\u003eSilicone Reinforced End Cap is a durable, pressure-resistant closure solution designed for automotive, industrial, and marine systems requiring secure sealing of unused outlets, pipes, and connectors. Constructed with a smooth extruded silicone compound inner layer, reinforced by polyester braid, and finished with a high-grade silicone exterior, the cap provides excellent heat stability, flexibility, and resistance to pressure and environmental stress. Built to SAE J20 R3 standards, the reinforced end cap withstands operating temperatures from -50°C to +220°C, with peaks up to +250°C, ensuring long-term reliability in high-performance and demanding environments. Available in a wide range of diameters from 4 mm to 25 mm, each cap features a short 60 mm overall length and 50 mm insertable length, providing a secure and robust seal across different applications.\u003c\/p\u003e\n\n\u003ch3 style=\"line-height: 52px\"\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cp\u003e\u003cstrong\u003eInner Layer:\u003c\/strong\u003e Smooth extruded silicone compound for flexibility and sealing integrity.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp\u003e\u003cstrong\u003eReinforcement:\u003c\/strong\u003e Polyester braid for added strength and pressure resistance.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp\u003e\u003cstrong\u003eOuter Layer:\u003c\/strong\u003e High-grade silicone offering durability and environmental resistance.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp\u003e\u003cstrong\u003eConstruction:\u003c\/strong\u003e Multi-ply wall with reinforced structure for long service life.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp\u003e\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -50°C to +220°C (peak +250°C).\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp\u003e\u003cstrong\u003eInternal Diameter Range:\u003c\/strong\u003e 4 mm to 25 mm.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp\u003e\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 12 bar (small bore) down to 5 bar (large bore), size dependent.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp\u003e\u003cstrong\u003eBursting Pressure:\u003c\/strong\u003e Typically 3x working pressure (up to 36 bar).\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp\u003e\u003cstrong\u003eLength:\u003c\/strong\u003e 60 mm overall, 50 mm insertable for secure sealing.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp\u003e\u003cstrong\u003eStandard:\u003c\/strong\u003e SAE J20 R3 compliant.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe reinforced silicone end cap combines robust construction with flexibility, ensuring dependable performance in systems handling coolant, oil vapours, air, and industrial fluids. The polyester braid reinforcement stabilises the cap under pressure while maintaining elasticity for easy installation and removal. With smooth internal walls and a reinforced silicone exterior, the cap resists cracking, ozone, and thermal degradation, making it suitable for prolonged use in engine bays, marine machinery, and industrial equipment. Burst ratings up to three times the working pressure provide a strong safety margin, while the compact length ensures neat and efficient sealing of pipe ends, manifolds, and unused outlets.\u003c\/p\u003e\n\n\u003cp\u003eApplications include sealing off unused coolant or air lines in automotive systems, blanking off turbo and intercooler pipework, protecting connectors during testing and maintenance, and industrial equipment requiring temporary or permanent closure of outlets. Widely used in motorsport, marine engineering, agricultural machinery, and custom fabrication, silicone reinforced end caps deliver reliable protection and containment in high-temperature, medium-pressure environments. Keywords: silicone reinforced end cap, silicone blanking cap, high-temperature sealing cap, SAE J20 R3 silicone cap, industrial hose end cap, reinforced silicone closure.\u003c\/p\u003e","brand":"Auto Silicone Hoses","offers":[{"title":"4mm \/ Black","offer_id":55668438466937,"sku":"SRP004K-ASH","price":10.58,"currency_code":"GBP","in_stock":true},{"title":"6mm \/ Black","offer_id":55668438499705,"sku":"SRP006K-ASH","price":10.58,"currency_code":"GBP","in_stock":true},{"title":"8mm \/ Black","offer_id":55668438532473,"sku":"SRP008K-ASH","price":10.69,"currency_code":"GBP","in_stock":true},{"title":"10mm \/ Black","offer_id":55668438565241,"sku":"SRP010K-ASH","price":11.02,"currency_code":"GBP","in_stock":true},{"title":"12mm \/ Black","offer_id":55668438598009,"sku":"SRP012K-ASH","price":11.45,"currency_code":"GBP","in_stock":true},{"title":"16mm \/ Black","offer_id":55668438630777,"sku":"SRP016K-ASH","price":11.88,"currency_code":"GBP","in_stock":true},{"title":"18mm \/ Black","offer_id":55668438663545,"sku":"SRP018K-ASH","price":12.42,"currency_code":"GBP","in_stock":true},{"title":"20mm \/ Black","offer_id":55668438696313,"sku":"SRP020K-ASH","price":12.53,"currency_code":"GBP","in_stock":true},{"title":"25mm \/ Black","offer_id":55668438729081,"sku":"SRP025K-ASH","price":12.96,"currency_code":"GBP","in_stock":true},{"title":"4mm \/ Blue","offer_id":56023466967417,"sku":"SRP004B-ASH","price":10.58,"currency_code":"GBP","in_stock":true},{"title":"6mm \/ Blue","offer_id":56023467000185,"sku":"SRP006B-ASH","price":10.58,"currency_code":"GBP","in_stock":true},{"title":"8mm \/ Blue","offer_id":55668438761849,"sku":"SRP008B-ASH","price":10.69,"currency_code":"GBP","in_stock":true},{"title":"10mm \/ Blue","offer_id":55668438794617,"sku":"SRP010B-ASH","price":11.02,"currency_code":"GBP","in_stock":true},{"title":"12mm \/ Blue","offer_id":55668438827385,"sku":"SRP012B-ASH","price":11.45,"currency_code":"GBP","in_stock":true},{"title":"16mm \/ Blue","offer_id":55668438860153,"sku":"SRP016B-ASH","price":11.88,"currency_code":"GBP","in_stock":true},{"title":"18mm \/ Blue","offer_id":55668438892921,"sku":"SRP018B-ASH","price":12.42,"currency_code":"GBP","in_stock":true},{"title":"20mm \/ Blue","offer_id":55668438925689,"sku":"SRP020B-ASH","price":12.53,"currency_code":"GBP","in_stock":true},{"title":"25mm \/ Blue","offer_id":55668438958457,"sku":"SRP025B-ASH","price":12.96,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/5276\/3879\/files\/SRP_B_Sh02.webp?v=1755768813"},{"product_id":"silicone-end-cap","title":"Silicone Rubber Caps","description":"\u003cp\u003eSilicone Unreinforced End Cap provides a clean, high‑integrity method to blank off pipe stubs, hose tails, and tube ends in automotive, industrial, and maintenance environments. Manufactured from smooth extruded silicone compound to SAE J20 R3, the silicone end cap resists extreme temperatures from -50°C to +220°C with short‑term peaks to +250°C, maintaining elasticity and seal reliability under thermal cycling. With a consistent 3.5 mm wall and a smooth internal bore, the cap presses on easily and grips securely, supporting applications such as vacuum line sealing, coolant system blanking, pneumatic circuit protection, and fluid transfer line isolation. Available across popular internal diameters from 4 mm to 38 mm with a typical insertable length of 30 mm (and a 60 mm overall length on the 20 mm size), the silicone blanking cap offers a versatile, reusable alternative to rigid plugs or taped closures. The inert, non‑reinforced silicone construction combines flexibility with durability, while the translucent finish assists visual checks where required. These features make the silicone end cap—also known as a silicone vacuum cap or silicone blanking cap—well suited to industrial applications that demand dependable sealing at elevated temperatures.\u003c\/p\u003e\n\u003ch3 style=\"line-height: 52px;\"\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e Smooth extruded silicone compound (inner layer and outer layer), unreinforced.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStandard:\u003c\/strong\u003e Conforms to SAE J20 R3.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e -50°C to +220°C; peak +250°C.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInternal Diameter Range:\u003c\/strong\u003e 4 mm to 38 mm.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWall Thickness:\u003c\/strong\u003e 3.5 mm (all listed sizes).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInsertable Length:\u003c\/strong\u003e 30 mm (typical).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOverall Length:\u003c\/strong\u003e 35 mm standard; 60 mm on 20 mm ID variant.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWeights:\u003c\/strong\u003e Size‑dependent (approx. 2 g to 22 g across the range).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePrecision‑made from unreinforced silicone rubber, the cap’s smooth bore ensures uniform contact pressure and a reliable friction fit over tube ends and hose barbs, supporting airtight and liquid‑tight blanking. The constant 3.5 mm wall thickness balances flexibility with crush resistance, allowing quick push‑fit installation without tools and repeated removal for servicing. High‑temperature capability up to +220°C continuous (with short peaks to +250°C) sustains sealing performance adjacent to engines, ovens, and heated process lines, while low‑temperature elasticity down to -50°C maintains grip in cold rooms or outdoor environments. The non‑reinforced construction avoids fabric edges that can fray or wick fluids, making the cap suitable for temporary fluid transfer isolation, pneumatic systems, and general industrial applications where durability, resilience, and easy handling matter. Compliance with SAE J20 R3 underscores material stability and heat ageing resistance expected in automotive and plant maintenance settings. Across sizes from 4 mm to 38 mm ID, the silicone end cap accommodates common tube and hose dimensions, enabling standardised spares stocking and consistent fit across equipment.\u003c\/p\u003e\n\u003cp\u003eTypical applications include blanking spare ports on intake manifolds and vacuum circuits, sealing coolant take‑offs during maintenance, capping compressed‑air lines, and protecting exposed pipe stubs during storage or transport. In manufacturing and workshop environments, the silicone vacuum cap serves as a reusable closure for pneumatic tools, instrumentation hookups, and industrial fluid handling setups, helping to prevent ingress of dust and debris. In agriculture and irrigation, the cap provides a quick method to isolate branches and service lines. For chemical handling at moderate conditions, the inert silicone composition offers a non‑corroding, flexible barrier. Overall, polyester‑free, silicone reinforced PVC alternatives are unnecessary here; the unreinforced silicone end cap offers clean, medium‑duty sealing performance wherever a neat, removable closure is required.\u003c\/p\u003e","brand":"Auto Silicone Hoses","offers":[{"title":"4mm \/ Blue","offer_id":55672653513081,"sku":"SEC004B-ASH","price":1.62,"currency_code":"GBP","in_stock":true},{"title":"4mm \/ Black","offer_id":55672653545849,"sku":"SEC004K-ASH","price":1.62,"currency_code":"GBP","in_stock":true},{"title":"4mm \/ Red","offer_id":55672653578617,"sku":"SEC004R-ASH","price":1.62,"currency_code":"GBP","in_stock":true},{"title":"6mm \/ Blue","offer_id":55672653611385,"sku":"SEC006B-ASH","price":1.73,"currency_code":"GBP","in_stock":true},{"title":"6mm \/ Black","offer_id":55672653644153,"sku":"SEC006K-ASH","price":1.73,"currency_code":"GBP","in_stock":true},{"title":"6mm \/ Red","offer_id":55672653676921,"sku":"SEC006R-ASH","price":1.73,"currency_code":"GBP","in_stock":true},{"title":"8mm \/ Blue","offer_id":55672653709689,"sku":"SEC008B-ASH","price":1.84,"currency_code":"GBP","in_stock":true},{"title":"8mm \/ Black","offer_id":55672653742457,"sku":"SEC008K-ASH","price":1.84,"currency_code":"GBP","in_stock":true},{"title":"8mm \/ Red","offer_id":55672653775225,"sku":"SEC008R-ASH","price":1.84,"currency_code":"GBP","in_stock":true},{"title":"10mm \/ Blue","offer_id":55672653807993,"sku":"SEC010B-ASH","price":1.94,"currency_code":"GBP","in_stock":true},{"title":"10mm \/ Black","offer_id":55672653840761,"sku":"SEC010K-ASH","price":1.94,"currency_code":"GBP","in_stock":true},{"title":"10mm \/ Red","offer_id":55672653873529,"sku":"SEC010R-ASH","price":1.94,"currency_code":"GBP","in_stock":true},{"title":"12mm \/ Blue","offer_id":55672653906297,"sku":"SEC012B-ASH","price":2.48,"currency_code":"GBP","in_stock":true},{"title":"12mm \/ Black","offer_id":55672653939065,"sku":"SEC012K-ASH","price":2.48,"currency_code":"GBP","in_stock":true},{"title":"12mm \/ Red","offer_id":55672653971833,"sku":"SEC012R-ASH","price":2.48,"currency_code":"GBP","in_stock":true},{"title":"16mm \/ Blue","offer_id":55672654004601,"sku":"SEC016B-ASH","price":2.59,"currency_code":"GBP","in_stock":true},{"title":"16mm \/ Black","offer_id":55672654037369,"sku":"SEC016K-ASH","price":2.59,"currency_code":"GBP","in_stock":true},{"title":"16mm \/ Red","offer_id":55672654070137,"sku":"SEC016R-ASH","price":2.59,"currency_code":"GBP","in_stock":true},{"title":"18mm \/ Blue","offer_id":55672654102905,"sku":"SEC018B-ASH","price":2.7,"currency_code":"GBP","in_stock":true},{"title":"18mm \/ Black","offer_id":55672654135673,"sku":"SEC018K-ASH","price":2.7,"currency_code":"GBP","in_stock":true},{"title":"18mm \/ Red","offer_id":55672654168441,"sku":"SEC018R-ASH","price":2.7,"currency_code":"GBP","in_stock":true},{"title":"20mm \/ Blue","offer_id":55672654201209,"sku":"SEC020B-ASH","price":2.81,"currency_code":"GBP","in_stock":true},{"title":"20mm \/ Black","offer_id":55672654233977,"sku":"SEC020K-ASH","price":2.81,"currency_code":"GBP","in_stock":true},{"title":"20mm \/ Red","offer_id":55672654266745,"sku":"SEC020R-ASH","price":2.81,"currency_code":"GBP","in_stock":true},{"title":"25mm \/ Blue","offer_id":55672654299513,"sku":"SEC025B-ASH","price":2.81,"currency_code":"GBP","in_stock":true},{"title":"25mm \/ Black","offer_id":55672654332281,"sku":"SEC025K-ASH","price":2.81,"currency_code":"GBP","in_stock":true},{"title":"25mm \/ Red","offer_id":55672654365049,"sku":"SEC025R-ASH","price":2.81,"currency_code":"GBP","in_stock":true},{"title":"28mm \/ Blue","offer_id":55672654397817,"sku":"SEC028B-ASH","price":3.13,"currency_code":"GBP","in_stock":true},{"title":"28mm \/ Black","offer_id":55672654430585,"sku":"SEC028K-ASH","price":3.13,"currency_code":"GBP","in_stock":true},{"title":"28mm \/ Red","offer_id":55672654463353,"sku":"SEC028R-ASH","price":3.13,"currency_code":"GBP","in_stock":true},{"title":"30mm \/ Blue","offer_id":55672654496121,"sku":"SEC030B-ASH","price":3.35,"currency_code":"GBP","in_stock":true},{"title":"30mm \/ Black","offer_id":55672654528889,"sku":"SEC030K-ASH","price":3.35,"currency_code":"GBP","in_stock":true},{"title":"30mm \/ Red","offer_id":55672654561657,"sku":"SEC030R-ASH","price":3.35,"currency_code":"GBP","in_stock":true},{"title":"32mm \/ Blue","offer_id":55672654594425,"sku":"SEC032B-ASH","price":3.46,"currency_code":"GBP","in_stock":true},{"title":"32mm \/ Black","offer_id":55672654627193,"sku":"SEC032K-ASH","price":3.46,"currency_code":"GBP","in_stock":true},{"title":"32mm \/ Red","offer_id":55672654659961,"sku":"SEC032R-ASH","price":3.46,"currency_code":"GBP","in_stock":true},{"title":"35mm \/ Blue","offer_id":55672654692729,"sku":"SEC035B-ASH","price":3.46,"currency_code":"GBP","in_stock":true},{"title":"35mm \/ Black","offer_id":55672654725497,"sku":"SEC035K-ASH","price":3.46,"currency_code":"GBP","in_stock":true},{"title":"35mm \/ Red","offer_id":55672654758265,"sku":"SEC035R-ASH","price":3.46,"currency_code":"GBP","in_stock":true},{"title":"38mm \/ Blue","offer_id":55672654791033,"sku":"SEC038B-ASH","price":3.89,"currency_code":"GBP","in_stock":true},{"title":"38mm \/ Black","offer_id":55672654823801,"sku":"SEC038K-ASH","price":3.89,"currency_code":"GBP","in_stock":true},{"title":"38mm \/ Red","offer_id":55672654856569,"sku":"SEC038R-ASH","price":3.89,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/5276\/3879\/files\/SEC_B_Sh01.webp?v=1755781215"}],"url":"https:\/\/de.siliconehoseuk.co.uk\/en\/collections\/silicone-end-caps.oembed","provider":"Silicone Hose UK","version":"1.0","type":"link"}