Cast-in fire collar

H65S 65 mm cast-in fire collar

The smallest collar in the range, sized for small bore plastic pipe penetrations up to 63 mm, such as appliance and branch wastes. Cast into the slab before the pour and sealed by patented spring activation, restoring the floor’s fire resistance where a pipe passes through it.

3 minute rapid close
Up to 4 hours fire resistance
Seals smoke and fire

Sure Snap H65S 65 mm cast-in fire collar

Installation essentials

Designed for a fast, clean cast-in install

Cast in before the pour. Fixed to the formwork by its locator plate, which also blocks slurry, and set flush with the underside of the slab. Collars must not be recessed below it, except using the approved Manifold Recess Former.
Cut to slab depth. Standard height 250 mm, trimmed to slab depth on site if required, with stackable 50 mm extensions for slabs deeper than 250 mm.
Minimum slab. 150 mm thick, minimum concrete strength 20 MPa. Greater thickness or density is permitted; less is not.
Cluster installs. Use Connection Clips to join adjacent collars, and the Manifold Recess Former where a manifold sits on the slab.
Built for the site. Snap off nail points make denailing obvious when the formwork is struck, a reinforced removable cap takes heavy site traffic, and the bright casing is easy to spot on a busy deck.

What’s inside

What’s inside the H65S

A closer look at the components that make up the H65S and what each one does.

Cutaway diagram of the Sure Snap H65S cast-in fire collar showing its components: cap, extension, collar casing, rubber ring, spring pocket, intumescent lining, base flange and locator plate

Cap. The centre is punctured, then the cap is pried out with a screwdriver.
Extension. Each one adds 50 mm of height.
Collar casing. The rigid polypropylene body.
Rubber ring. Seals against the pipe.
Spring pocket. Houses the activation springs.
Intumescent lining. The patented Intumesh that expands in a fire.
Base flange. Prevents concrete ingress and gives clip points to align adjacent collars.
Locator plate. A grooved plate that holds the pipe in place, with a central fixing hole and alignment windows.

Specifications

H65S specifications

Stock code	SELFC-H65S
Nominal pipe Ø	Up to 63 mm (small-bore pipes)
Inner Ø	84 mm
Standard collar height	250 mm (trim on site; 50 mm extensions)
Base flange	168 mm round
Casing	Polypropylene, 1.6 mm wall
Activation springs	3, galvanised steel with nylon fuse links
Intumescent	Patented Intumesh, mesh backed sheet
Minimum slab thickness	150 mm
Minimum concrete strength	20 MPa
Accessories	Connection Clips, stackable extensions
LPCB certificate	1833a/01

Order the H65S from Selkent

Fire performance

Tested fire resistance by pipe type

All figures are from the BRE Extended Application Report P104650-1003 Issue 3. The last two columns are the EN 13501-2 classifications: insulation (EI) is how long the collar holds back both heat and flame, and integrity (E) is the longer period it keeps stopping flame and hot gases.

Peak fire resistance

Up to 4 hrs

E 240 integrity, EI 180

PP bell end pipe, tested to BS EN 1366-3.

Pipe type	Diameter (mm)	Pipe wall (mm)	End / socket wall (mm)	Insulation (EI)	Integrity (E)
PVC	40 to 63	3.3 to 5.1		180 min	240 min
PVC with socket	40 to 63	3.5 to 5.0	3.5 to 5.0	180 min	240 min
PP	40 to 50	2.2 to 2.3		180 min	240 min
PP with bell end	40 to 50	1.8 to 2.7	1.8 to 2.7	180 min	240 min
PE-HD	26 to 64	3.0 to 6.4		120 min	240 min
PE-X	16 to 63	3.1 to 9.7		90 min	90 min

Swipe to see all columns →

LPCB and UKAS product-certified, certificate C1833a/01 (LPS 1132 Issue 4.2)

Download the full report

Tested through a 150 mm steel reinforced concrete slab at 2240 kg/m³ density.
Tested uncapped, the worst case, so every capped configuration is covered.
BS EN 1366-3, classified to EN 13501-2, extended via EN 15882-3.

Manufacturer compatible pipes

The ratings above are certified by generic pipe type (PVC, PP, PE-HD, PE-X). Sure Snap also lists the following materials and branded systems as compatible (manufacturer information). Confirm the certified rating for your specific pipe and configuration against the certification and EN Global Compliance Report, and reach out to our technical team if you need clarification.

Materials

U-PVCP-PVCC-PVCHDPEMDPEABSPP-RPE-X

Branded systems

Rehau Raupiano PlusValsir TriplusAkatherm dBlue

Documentation

Compliance and downloads

Third party tested by BRE Global.
LPCB approved (1833a/01) and listed on NBS Source.

Drawings, CAD and BIM files

H65S cast-in fire collar

SELFC-H65S

All product drawings →

Drawing sheet Revit family Plan view Side view

Resources

Installation guide

Step by step cast-in installation (INS-HT-SS-V2).

Download PDF ↓

Fire rating by collar

Fire resistance for each collar model.

Download PDF ↓

Fire rating by pipe

EI/E rating for each pipe type and diameter.

Download PDF ↓

Certification

LPCB Certificate of Product Approval 1833a.

View PDF ↓

EN Global Compliance Report

BRE Extended Application Report P104650-1003 (Issue 3).

Download PDF ↓

Specify on NBS Source

Add the H65S to your NBS project specification.

Open on NBS Source →

Sealing the annular gap (top of slab, per BRE Issue 3)

Up to 10 mm	No backfill required
10 to 20 mm	Sika Everbuild Everflex LMA 200 Contractors Sealant, 10 mm deep
20 to 40 mm	Weber Saint Gobain non shrink grout over a cardboard gasket

PP pipes also take a PE foam strip (about 5 × 30 mm) around the pipe. Full method in the installation guide.

See it in action

Outperforms a competitor’s collar

We put a Sure Snap collar in a side by side fire test against a competitor’s fire collar. Sure Snap’s patented spring activation and the Intumesh™ intumescent deliver a fast closing seal, stopping flame and smoke from escaping through the pipe.