Name: Prime Hardware
Rating: 4.9 (110 reviews)

Description & Specifications FAQs

Kilargo

KILARGO IS3021SI FINNED DOOR BOTTOM SEAL - AVAILABLE IN VARIOUS SIZES

The Kilargo IS3021si is a large finned compression-type silicone seal for door bottoms and meeting stiles of single and double action doors – and door bottoms of roller-type doors. It seals gaps of 20–24mm against medium and ambient temperature smoke, sound, dust, light, weather and vermin.

Large gap 20–24mmRoller doors OKSmoke & acousticDouble action OK

Key Features

Seals unusually large door bottom gaps (20–24mm)

Suits single and double action doors AND roller-type door bottoms

Soft silicone conforms to uneven floors

Seals against smoke, sound, dust, light, weather and vermin

Conforms with BCA Specification C3.4; acoustically tested

Pre-drilled fixing holes, screws and instructions supplied

Silver anodised carrier, grey gasket (black on request); Australian made

What It's Used For

Reach for the IS3021si when the gap under a door is too big for standard seals – warehouse and plant-room doors, garage and roller doors, and older doors over worn floors. The large silicone section bridges and cushions the oversized gap.

On garage and sectional doors it also teams with Kilargo brush seals to close the full perimeter against weather, dust and pests.

Specifications

Type	Large finned compression-type silicone door bottom seal
Suits	Single/double action doors; roller-type door bottoms
Gap size	20–24mm
Finish	Silver anodised, grey silicone (black on request)
Antimicrobial option	Yes – select at checkout (AM silicone gasket)
Available sizes	1000mm, 1250mm, 1500mm, 1750mm, 2000mm, 2250mm, 2500mm, 2750mm, 3000mm, 3500mm, 4000mm, 4500mm, 5000mm
MPN	IS3021si

Compliance & What It Means

Smoke sealing — BCA/NCC Specification C3.4. Conforms with Building Code of Australia (NCC) Specification C3.4 smoke sealing requirements. Smoke — not flame — is the biggest killer in building fires, and C3.4 sets out how door gaps must be sealed so escape routes stay clear of smoke.

Acoustic tested — AS 1191 / ISO 140-3 / ISO 10140-2. Acoustically tested in accordance with AS 1191, ISO 140-3 and ISO 10140-2 — the laboratory standards for measuring sound insulation. Correctly sealed doors are the difference between a quiet room and a noisy one; this seal is proven to cut sound leakage through the door gaps.

Antimicrobial option available. Also offered in an antimicrobial (AM) silicone version, formulated to inhibit the growth of bacteria and mould on the gasket surface — specified in hospitals, aged care, laboratories and food-preparation areas.

Fire and smoke approvals apply to tested, proprietary door assemblies. Always confirm suitability for your specific door type and required rating with your fire door manufacturer or building certifier.

Ordering & dispatch. This is a non-stocked, specialty architectural item ordered directly from the Kilargo factory line. Please allow a standard handling time of 5–8 business days after cleared payment before dispatch. Need it sooner, or not sure which seal suits your door? Call Prime Hardware on 1800 329 028.

What gap does the IS3021si seal?

It suits gaps of 20–24mm. Measure between the door bottom (or stile) and the sealing surface with the door closed; outside this range, call Prime Hardware on 1800 329 028 for the right alternative.

How is it installed?

Fixing screws are supplied with detailed fitting instructions, and the fixing holes are pre-drilled (and slotted where applicable) so the seal can be positioned and adjusted accurately against the floor or threshold before final tightening.

What lengths are available?

Standard lengths are 1000mm and 2250mm, with 250mm increments available from 1000mm to 5000mm. Seals can be cut down on site for an exact door width.

What is the handling time for this item?

This is a non-stocked, specialty architectural item ordered directly from the Kilargo factory. Allow a standard handling time of 5–8 business days after cleared payment before dispatch. If your project needs express turnaround, call Prime Hardware on 1800 329 028 to confirm current factory lead times.

I'm not sure this is the right seal for my door — can I get help?

Yes. Door sealing depends on your door type, the gap sizes and what you need to seal against (fire, smoke, sound, weather or drafts). Call Prime Hardware on 1800 329 028 with your door details and gap measurements and we'll confirm the right Kilargo seal, size and finish before you order.