Radon Mitigation System Component
SlabCollar™
One boot. Four seals. Zero sealant.
Compression-fit EPDM floor seal for 4″ Sch 40 radon and vapor mitigation pipe penetrations.
SlabCollar replaces field-applied sealants with a repeatable, inspectable, compression-fit boot that seals the pipe, the hole, and the slab surface in a single installation step — no adhesive and no cure time.
Why SlabCollar
Four Seals, One Part
A soft top lip, two annular ribs, and an inner pipe flange form four independent compression seals — three against the concrete, one on the pipe — with no sealant, no adhesive, and no cure time.
Two Install Modes
Seats in a ≈127 mm (5.0″) cored hole, or clamps a thin plastic or wood lid from 1/8″ to 1/2″ thick. One SKU covers both methods.
Inspectable & Removable
Compression fit means the seal is visible, testable, and the pipe can be pulled and re-seated for service — no destructive tear-out.
Engineered EPDM
50A-durometer EPDM rated −55 °C to +125 °C, with tested ozone resistance — the classic long-term failure mode for rubber seals below grade.
Two Ways to Install
Direct slab penetration
Concrete Core
Press SlabCollar into a ≈127 mm (5.0″) core-drilled hole. The two annular ribs seal the bore, the top lip seals the slab surface, and the inner flange seals the pipe — four seal lines with no sealant.
- 01Core-drill a ≈127 mm (5.0″) hole through the slab.
- 02Insert SlabCollar until the top lip sits flat on the concrete surface.
- 03Pass the 4″ Sch 40 pipe through the boot from below or above.
- 04Confirm the top lip, ribs, and pipe flange are seated — installation is complete.
Plastic or wood cover plate
Thin Lid (Panel)
SlabCollar clamps a thin panel lid (plastic or plywood, 1/8″–1/2″ thick) with the shoulder sealing the underside and the top lip sealing above. The annular ribs hang free below the panel; sealing is handled by the lip/shoulder pair and the inner pipe flange.
- 01Cut or drill a hole in the lid sized to accept the boot body.
- 02Insert SlabCollar through the lid from the top side.
- 03The shoulder captures and seals the underside of the lid; the top lip seals above.
- 04Pass the pipe through and confirm inner-flange engagement.
“We designed SlabCollar to eliminate the two things that make field-applied sealants unreliable: mixing and curing. There is nothing to mix and nothing to cure — the seal is made the moment the boot is pressed into place.”
Installation
Video Coming Soon