{"product_id":"slabcollar-4-inch-radon-pipe-seal","title":"SlabCollar™ 4\" EPDM Radon Pipe Penetration Seal — Fits 5\" Cored Holes","description":"\u003ch3\u003eThe drop-in seal for 4\" radon pipe through a 5\" cored hole\u003c\/h3\u003e\n\u003cp\u003eSlabCollar™ is a one-piece flanged EPDM bushing that seals the gap between a 4\" Schedule 40 radon vent pipe and a 5\" cored slab opening. It replaces messy caulk-and-backer-rod sealing and outperforms thermoplastic compression bushings — without the precision a perfect cored hole demands.\u003c\/p\u003e\n\u003cp\u003eDesigned for C-NRPP-certified mitigators. Installed by feel, in under a minute. No mixing, no curing, no callbacks.\u003c\/p\u003e\n\u003ch3\u003eWhy mitigators are switching to SlabCollar\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlanged seal, not just a bushing.\u003c\/strong\u003e The 6-1\/8\" top flange rests flat on the slab and covers chipped or oversized cored-hole edges that compression bushings can't hide. You get a primary seal in the hole and a secondary seal against the slab surface — both in one part.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForgiving on real-world holes.\u003c\/strong\u003e Cored hole came out a little oval? Edge chipped? SlabCollar's EPDM body flexes to seal openings that rigid thermoplastic bushings can't. Less time chasing leaks with a smoke pencil.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHolds the pipe, not just seals it.\u003c\/strong\u003e Engineered to a specific durometer that balances flexibility (so the flanges seal imperfect holes) with the firmness needed to grip the pipe. In bench testing, a collar with a 4\" Sch 40 stub through it supported a 240 lb adult standing on the pipe with no deformation. Bracing is still required per CGSB 149.12 — but you get a fit that doesn't loosen the first time someone bumps the stub.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemovable for service.\u003c\/strong\u003e When a sump or suction pit needs work, SlabCollar pulls out clean and goes back in. No grinding out hydraulic cement. No re-caulking the joint on the way out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo caulk required.\u003c\/strong\u003e EPDM compression seals against concrete and pipe on contact. Skip the urethane tube, skip the cure time, skip the cleanup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEPDM, not generic thermoplastic.\u003c\/strong\u003e Engineered for −40°C to +120°C operating range and the 25+ year service life EPDM is known for in roofing and sub-slab applications. No cold-weather brittleness. No UV degradation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBuilt for C-NRPP installations\u003c\/h3\u003e\n\u003cp\u003eSlabCollar meets the airtight-seal expectations of CGSB 149.12-2017 for active soil depressurization systems. Pairs with any 4\" Schedule 40 PVC or ABS radon vent pipe, any radon fan, any sub-slab pit configuration.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eHow to install\u003c\/span\u003e\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eCore a nominal 5\" hole through the slab. Clean dust and debris.\u003c\/li\u003e\n\u003cli\u003ePress SlabCollar into the hole, flange seated flat against the slab surface.\u003c\/li\u003e\n\u003cli\u003eSlide 4\" Sch 40 pipe through the collar. Brace pipe per CGSB 149.12 (the collar is not a structural support).\u003c\/li\u003e\n\u003cli\u003eRun a smoke pencil under fan suction to verify the seal. Done.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eBulk pricing for radon professionals\u003c\/h3\u003e\n\u003cp\u003eVerified C-NRPP and CARST mitigators get contractor pricing on case quantities. \u003ca href=\"\/account\/register\"\u003eCreate a pro account\u003c\/a\u003e to access wholesale rates.\u003c\/p\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs SlabCollar a direct replacement for the U-Stop?\u003c\/strong\u003e\u003cbr\u003eYes — SlabCollar is the first product that is designed for the specific use. Other products that have been used for years were never designed for this application, and as a results do not hold an adequate airtight seal.\u003cbr\u003eUnlike others - SlabCollar adds a top flange that covers the slab edge, uses EPDM instead of generic thermoplastic, and 2 outer flanges giving it 3 different airtight connections so that it can seal airtight even if the concrete hole is uneven, and is also engineered to grip the pipe under load to make installations easier.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need to use caulk with SlabCollar?\u003c\/strong\u003e\u003cbr\u003eNo. The EPDM compression seal is designed to be airtight on its own. A thin urethane bead at the flange edge is optional belt-and-suspenders.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat if my hole isn't perfectly 5\"?\u003c\/strong\u003e\u003cbr\u003eThe EPDM body and flange combination tolerates moderate hole irregularity. Significantly oversized or damaged holes should be patched before installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs there a fire-rated version?\u003c\/strong\u003e\u003cbr\u003eA fire-rated EPDM variant for NBC Article 3.6.4.3 applications is in development. \u003ca href=\"\/pages\/contact\"\u003eContact us\u003c\/a\u003e for project-specific requirements.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat about 3\" pipe?\u003c\/strong\u003e\u003cbr\u003eA 3\" SlabCollar is in production. \u003ca href=\"\/pages\/contact\"\u003eEmail us\u003c\/a\u003e to be notified at launch.\u003c\/p\u003e","brand":"RadonDepot","offers":[{"title":"Single Unit","offer_id":48532393328895,"sku":"SC-4-1","price":21.0,"currency_code":"CAD","in_stock":true},{"title":"Case of 10","offer_id":48532393361663,"sku":"SC-4-6","price":200.0,"currency_code":"CAD","in_stock":true},{"title":"Case of 100","offer_id":48549088788735,"sku":null,"price":1700.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0793\/6639\/0015\/files\/slabcollar-hero.png?v=1778901258","url":"https:\/\/radondepot.ca\/products\/slabcollar-4-inch-radon-pipe-seal","provider":"Radon Depot","version":"1.0","type":"link"}