{"product_id":"daptemn-expandable-freeze-rubber-plugs-kit-16pcs-8-sizes-neoprene-engine-pipe-seal","title":"Daptemn Expandable Freeze Rubber Plugs Kit — 16PCS (8 Sizes) Neoprene Engine \u0026 Pipe Seal","description":"\u003cp\u003e\u003cstrong\u003eDaptemn 16PCS expandable freeze rubber plugs are a complete neoprene-and-alloy repair kit with eight sizes that seal engine block and pipe openings quickly without welding.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf you need a fast, temporary or semi-permanent seal for coolant or oil passages, this kit supplies a range of expandable rubber plugs built to fit many common freeze-plug hole diameters. The set contains 16 plug assemblies—two of each size—made from neoprene rubber with alloy hardware that expands against the bore for a pressure-tight fit. Everything is organized in a clear plastic case so you can find the right size on the bench or in the toolbox.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these expandable rubber plugs stop leaks?\u003c\/h3\u003e\n\u003cp\u003eThe plugs work by expanding a neoprene sleeve inside the hole and clamping it with an internal plate and carriage bolt. Tightening the hex nut pulls the steel plate up, compressing the rubber outward to create a seal against the hole wall. This mechanical expansion creates a reliable barrier for liquids and gases without adhesives, welding, or machining.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNeoprene sleeve expands to match irregular or slightly worn bores.\u003c\/li\u003e\n  \u003cli\u003eAlloy carriage bolt and plate provide even compression and corrosion resistance.\u003c\/li\u003e\n  \u003cli\u003eO-ring improves sealing around the bolt assembly to reduce seepage.\u003c\/li\u003e\n  \u003cli\u003eTwo plugs per size allow for multiple repairs or backups.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich sizes are included and what hole ranges do they cover?\u003c\/h3\u003e\n\u003cp\u003eThe kit contains eight different diameters with two pieces each, covering hole sizes from about 3\/4\" to 1-3\/4\". Each size spans a small range so you can select the nearest fit and expand to form a tight seal. The range makes this kit useful for many automotive freeze-plug bores as well as general plumbing or fabrication tasks.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e3\/4\" plugs: fit holes approx. 19–22 mm.\u003c\/li\u003e\n  \u003cli\u003e7\/8\" plugs: fit holes approx. 22–25 mm.\u003c\/li\u003e\n  \u003cli\u003e1\" to 1-5\/8\" sizes: cover incremental ranges up to 41–44 mm.\u003c\/li\u003e\n  \u003cli\u003eTwo of each size provide redundancy or paired repairs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the components and how durable are they?\u003c\/h3\u003e\n\u003cp\u003eEach assembly combines a molded neoprene rubber sleeve with a steel chassis, alloy carriage bolt, hex nut, steel compression plate and an O-ring. The neoprene delivers flexibility and chemical resistance while the metal parts give the structural strength needed to maintain compression under pressure. Properly installed plugs resist oil and coolant seepage and remain serviceable for maintenance or longer-term use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNeoprene rubber: elastic, smooth finish, resists oils and coolants.\u003c\/li\u003e\n  \u003cli\u003eAlloy steel plate and carriage bolt: strong clamp force and corrosion resistance.\u003c\/li\u003e\n  \u003cli\u003eO-ring: adds secondary sealing around the bolt shaft.\u003c\/li\u003e\n  \u003cli\u003eClear plastic storage box: protects parts and keeps sizes sorted.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Daptemn 16PCS expandable freeze plug kit is aimed at mechanics, home garage DIYers, restorers and fabricators who need a fast, non-weld repair for engine block freeze plugs, pipe openings, or temporary service plugs. If you work on older engines, perform coolant system repairs, or need adaptable plugs for plumbing or prototype work, this kit gives a compact, organized selection of sizes and robust hardware to get jobs sealed quickly.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can these plugs handle coolant and oil?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The neoprene sleeves and alloy hardware are designed to resist common automotive fluids for sealing coolant and oil passages.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need special tools to install them?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Only basic hand tools: a wrench or socket to tighten the hex nut and compress the assembly for a proper seal.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Daptemn","offers":[{"title":"Default Title","offer_id":55166227448151,"sku":"B0D8J57B4Y","price":53.76,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/daptemn-front-packaging.jpg?v=1790365383","url":"https:\/\/britishgarage.co.uk\/products\/daptemn-expandable-freeze-rubber-plugs-kit-16pcs-8-sizes-neoprene-engine-pipe-seal","provider":"British Garage","version":"1.0","type":"link"}