{"product_id":"flexi-seal-4-0m-length-waterproofing-strip","title":"Flexi-Seal Waterproofing Strip — 4.0m Pre-Cut — Flexible Rubber — Large Baths \u0026 Shower Trays","description":"\u003ch2\u003eFlexi-Seal Waterproofing Strip — 4.0m Pre-Cut — Flexible Rubber — Large Baths \u0026amp; Shower Trays\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eFlexi-Seal 4.0m Waterproofing Strip\u003c\/strong\u003e is a professional flexible rubber seal that creates a permanent, watertight barrier between shower trays, baths, or worktops and bathroom walls. The butyl-based adhesive strip bonds securely to the tray or bath edge; tiles or wall panels are then fitted directly over the seal. The flexible rubber construction accommodates building movement and settlement without compromising the waterproof barrier. Independently tested to \u003cstrong\u003eBS EN 28510-1 1993\u003c\/strong\u003e. The 4.0m pre-cut length provides generous coverage for large baths, P-shaped and L-shaped baths, and full-size shower trays.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f8f8f8;border:1px solid #ddd;border-radius:4px;padding:12px 16px;margin-bottom:20px;\"\u003e\n\u003cstrong\u003e✅ Pre-cut 4.0m — ready to use.\u003c\/strong\u003e Ideal for large baths (1700–1800mm), P-shaped and L-shaped baths, and full-size shower trays (900–1200mm) on 3 sides. For standard installations, see the \u003ca href=\"\/products\/flexi-seal-2-0m-length-waterproofing-strip\"\u003eFlexi-Seal 2.0m strip\u003c\/a\u003e or the \u003ca href=\"\/products\/classi-seal-3-2m-length-waterproofing-strip\"\u003eClassi Seal 3.2m strip\u003c\/a\u003e.\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4.0m pre-cut length\u003c\/strong\u003e — generous coverage for large baths, P-shaped baths, and full-size shower trays\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible rubber construction\u003c\/strong\u003e — accommodates building movement and settlement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eButyl-based adhesive\u003c\/strong\u003e — integrated adhesive strip; secure, permanent bond\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcealed installation\u003c\/strong\u003e — tiles or wall panels fit directly over the seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBS EN 28510-1 1993 tested\u003c\/strong\u003e — independently tested to British and European standards\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSuitable for shower trays, baths, and worktops\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents water damage\u003c\/strong\u003e — protects against leakage at vulnerable wall junctions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specification\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Spajet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e FLEXI14\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEAN:\u003c\/strong\u003e 5060134754946\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Flexible rubber waterproofing strip\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 4.0 metres (pre-cut)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 100–120mm (upstand + base)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.8kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Flexible rubber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdhesive:\u003c\/strong\u003e Butyl-based integrated adhesive strip\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTesting:\u003c\/strong\u003e BS EN 28510-1 1993 (pressure-sensitive adhesive tapes)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication temperature:\u003c\/strong\u003e 5°C to 35°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable surfaces:\u003c\/strong\u003e Clean, dry, dust-free\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoverage:\u003c\/strong\u003e Large baths, P-shaped baths, full-size shower trays, extended worktops\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Tile or panel over seal; silicone at base edge\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCoverage Guide\u003c\/h2\u003e\n\u003cp\u003eUse these examples to confirm the 4.0m length suits your installation:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard 1700mm bath — 3 sides:\u003c\/strong\u003e 2 × 1700mm + 700mm end = 4,100mm — 4.0m provides near-complete coverage; trim the short end slightly or use a small offcut\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1200mm shower tray — 3 sides:\u003c\/strong\u003e 2 × 1200mm + 800mm = 3,200mm — 4.0m provides complete coverage with 800mm to spare\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e900mm shower tray — 3 sides:\u003c\/strong\u003e 2 × 900mm + 900mm = 2,700mm — 4.0m provides complete coverage with 1,300mm to spare\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eP-shaped or L-shaped bath:\u003c\/strong\u003e Measure the full perimeter of sides meeting the wall and add 10% for overlaps\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat’s Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFlexi-Seal flexible rubber waterproofing strip — 4.0m pre-cut\u003c\/li\u003e\n\u003cli\u003eIntegrated butyl-based adhesive backing\u003c\/li\u003e\n\u003cli\u003eInstallation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow It Works\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrepare:\u003c\/strong\u003e Ensure tray, bath, or worktop edges are clean, dry, and dust-free\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApply:\u003c\/strong\u003e Peel backing and press Flexi-Seal firmly onto the edge using the butyl adhesive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition:\u003c\/strong\u003e Install the tray, bath, or worktop — the upstand extends up the wall\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTile:\u003c\/strong\u003e Fit tiles or wall panels over the upstand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal:\u003c\/strong\u003e Apply neutral cure silicone to the bottom edge once tiling is complete\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eSuitable For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eLarge baths — 1700mm and 1800mm standard baths on 3 sides\u003c\/li\u003e\n\u003cli\u003eP-shaped and L-shaped shower baths — extended perimeter coverage\u003c\/li\u003e\n\u003cli\u003eFull-size shower trays — 900mm, 1000mm, 1200mm trays on 3 sides\u003c\/li\u003e\n\u003cli\u003eExtended bathroom worktops and vanity units\u003c\/li\u003e\n\u003cli\u003eNew builds where building movement is expected\u003c\/li\u003e\n\u003cli\u003eBathroom renovations and upgrades\u003c\/li\u003e\n\u003cli\u003eCommercial bathrooms — hotels, gyms, care facilities\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAlso Available — Waterproofing Strips\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/flexi-seal-2-0m-length-waterproofing-strip\"\u003eFlexi-Seal 2.0m Waterproofing Strip\u003c\/a\u003e — same product; shorter pre-cut length for compact shower trays, smaller baths, and worktops\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/classi-seal-3-2m-length-waterproofing-strip\"\u003eClassi Seal 3.2m Waterproofing Strip\u003c\/a\u003e — alternative brand; self-adhesive membrane; standard 3-sided coverage\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/classi-seal\"\u003eClassi Seal Per Metre\u003c\/a\u003e — cut to your exact length from a 25m roll\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/shower-trays\"\u003eShower Trays\u003c\/a\u003e — browse compatible flat and low profile trays\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWill 4.0m cover my bath or shower tray?\u003c\/h3\u003e\n\u003cp\u003eUse the coverage guide above to check. For a standard 1700mm bath on 3 sides you need approximately 4.1m — the 4.0m strip provides near-complete coverage with only a small shortfall on the short end (which can be supplemented with an offcut or a short additional piece). For a 1200mm shower tray on 3 sides you need 3.2m, leaving 800mm to spare. For P-shaped or L-shaped baths, measure the full perimeter of the sides meeting the wall and add 10% for overlaps before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the difference between the 4.0m and 2.0m Flexi-Seal?\u003c\/h3\u003e\n\u003cp\u003eBoth are the same Spajet Flexi-Seal product — flexible rubber, butyl adhesive, BS EN 28510-1 tested. The only difference is the pre-cut length. The \u003ca href=\"\/products\/flexi-seal-2-0m-length-waterproofing-strip\"\u003e2.0m version\u003c\/a\u003e is suited to compact shower trays (700–800mm), smaller baths, and worktops. The 4.0m version (this product) is suited to large baths, P-shaped baths, and full-size shower trays where more coverage is needed.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the difference between Flexi-Seal and Classi Seal?\u003c\/h3\u003e\n\u003cp\u003eBoth are professional waterproofing tanking strips but differ in material and adhesive. \u003cstrong\u003eFlexi-Seal\u003c\/strong\u003e uses a \u003cstrong\u003eflexible rubber\u003c\/strong\u003e construction with a \u003cstrong\u003ebutyl-based adhesive\u003c\/strong\u003e, tested to \u003cstrong\u003eBS EN 28510-1 1993\u003c\/strong\u003e. \u003cstrong\u003eClassi Seal\u003c\/strong\u003e uses a \u003cstrong\u003eflexible waterproof membrane\u003c\/strong\u003e with a \u003cstrong\u003epressure-sensitive self-adhesive backing\u003c\/strong\u003e and accommodates up to 15mm of movement. If you are unsure which is right for your installation, call us on \u003ca href=\"tel:01603381095\"\u003e01603 381095\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eIs Flexi-Seal suitable for P-shaped or L-shaped baths?\u003c\/h3\u003e\n\u003cp\u003eYes — the 4.0m length is specifically suited to P-shaped and L-shaped baths where the extended perimeter requires more strip than a standard rectangular bath. Measure the full length of all sides that meet the wall and add 10% for overlaps before ordering to confirm the 4.0m length is sufficient for your specific bath.\u003c\/p\u003e\n\n\u003ch3\u003eWhat type of silicone should I use at the base edge?\u003c\/h3\u003e\n\u003cp\u003eAlways use \u003cstrong\u003eneutral cure silicone\u003c\/strong\u003e (not acetic\/vinegar cure). Acetic cure silicone releases acetic acid during curing which can damage rubber and adhesive materials. Neutral cure silicone is widely available and is the correct choice for use with rubber waterproofing strips.\u003c\/p\u003e\n\n\u003ch3\u003eIs Flexi-Seal required if my shower tray has an integrated upstand?\u003c\/h3\u003e\n\u003cp\u003eNo — if your shower tray has an integrated upstand, the waterproofing is already built into the tray design and a separate seal strip is not required. Check your shower tray specification before ordering. If you are unsure, call us on \u003ca href=\"tel:01603381095\"\u003e01603 381095\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eCan I order if the item shows as out of stock?\u003c\/h3\u003e\n\u003cp\u003eYes — this product is available to order even when stock shows as zero. Please allow additional lead time and contact us on \u003ca href=\"tel:01603381095\"\u003e01603 381095\u003c\/a\u003e to confirm availability.\u003c\/p\u003e","brand":"Spajet","offers":[{"title":"Default Title","offer_id":53066280698193,"sku":"FLEXI14","price":30.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/3687\/9441\/files\/caInst_e3b553fe-319e-4f48-9cbc-7f98696a0150.jpg?v=1771232234","url":"https:\/\/www.bubblegumbathrooms.com\/products\/flexi-seal-4-0m-length-waterproofing-strip","provider":"Bubblegum Bathrooms","version":"1.0","type":"link"}