Exitex Replacement Threshold Seal 914mm for MWK/DSS/WTB/MXS/SLT

Exitex DSS Replacement Threshold Seal 914mm Black — uPVC & Composite Door Draught Seal

Genuine Exitex replacement threshold seal — 914mm black rubber insert that restores the weather seal on Macclex, Slimline, Weatherten and MWK door sills to stop draughts and water ingress.

Exitex DSS Replacement Threshold Seal is the genuine 914mm black rubber insert designed to slot into the upper channel of Exitex aluminium door thresholds. If you've noticed a draught creeping under your front or back door, water pooling on the inside of the threshold, or you can see the original seal has split, flattened or perished, this is the exact replacement part you need. It restores the weather seal to factory condition without the cost or upheaval of replacing the entire threshold bar.

Manufactured by Exitex (part number 1.01.0361.0914.00), this seal is supplied as a 914mm (36-inch) roll of flexible black rubber that cuts cleanly to length with a sharp craft knife. It's the same OEM seal originally fitted to Exitex Double Sealing Sill (DSS), Macclex, Slimline, Weatherten and MWK threshold ranges, so you get a guaranteed factory fit and the same long-term weather performance.

Key Benefits for uPVC & Composite Door Owners:

• Stops Draughts Under Your Door – Perished or flattened threshold seals are one of the biggest causes of cold draughts at floor level. This replacement insert sits tight against the closed door, restoring the airtight seal and helping cut heat loss through your entrance.
• Genuine Exitex OEM Part – This is the original manufacturer's seal (part 1.01.0361.0914.00) — not a generic copy. It matches the exact profile, density and rubber compound the threshold was designed around, so it slides into the channel cleanly and seats properly first time.
• Fits a Huge Range of Exitex Thresholds – Compatible with Double Sealing Sill, Macclex, Macclex Lowline, Slimline, Weatherten, Weatherten Lowline, MWK 20/25/27/95/104, MXS, MDS, OUD, Kleertred and Universal Mobility thresholds — see the full part-number list in specifications below.
• Saves the Cost of a Full Threshold Replacement – Replacing a complete door threshold is a major job involving the door being removed and the cill being unbolted. Swapping just the rubber insert takes minutes and a fraction of the cost.
• Cuts Cleanly to Length – Supplied at 914mm (36 inches), the seal trims down with a sharp utility knife to suit narrower door openings. No specialist tools required.
• Restores Water Tightness – A failed threshold seal lets driving rain track under the door onto your hallway floor. A fresh insert restores the weather barrier and protects flooring, skirting and the threshold itself from water damage.
• Durable Rubber Compound – Designed to stay flexible through UK winters and summers without going brittle, cracking or taking a permanent set — so the seal keeps working season after season.
• Simple DIY Fit – No need to call a tradesperson. The old seal pulls out of the channel and the new one slides in — most homeowners can complete the swap in under ten minutes.

Compatible Exitex Threshold Models:

This seal is the correct replacement insert for the following Exitex threshold part numbers. Check the label or original paperwork on your threshold to confirm fit:

• Slimline: 1.01.0420
• Kleertred 20 / 25: 1.01.0200 / 1.01.0205
• Universal Mobility Threshold: 1.01.0530 / 1.01.0535
• Double Sealing Sill (DSS): 1.01.0120
• Weatherten Lowline / Weatherten Bar: 1.01.0501 / 1.01.0500
• MWK 20 / 25 / 27 / 95 / 104: 1.01.0280 / 1.01.0290 / 1.01.0297 / 1.01.0295 / 1.01.0296
• MWK R/2/20: 1.01.0286
• Macclex / Macclex Lowline: 1.01.0300 / 1.01.0305
• MXS 15 / 15/2 / 15/2 RITB: 1.01.0315 / 1.01.0317 / 1.01.0760
• MXS 15/4 / 15/56: 1.01.0313 / 1.01.0314
• MXS 15/67 / 15/68 / 15/68 RITB / 15/72: 1.01.0389 / 1.01.0312 / 1.01.0764 / 1.01.0387
• OUD Threshold: 1.01.0325
• MDS 25: 1.01.0750 / 1.01.0751
• MDS 70: 1.01.0770 / 1.01.0772 / 1.01.0773
• MDS 80: 1.01.0264 / 1.01.0753 / 1.01.0754
• MDS 150 / 150/58: 1.01.0756 / 1.01.0761

Product Specifications:

• Brand: Exitex
• Manufacturer Part Number: 1.01.0361.0914.00
• Product Type: Replacement threshold seal insert (upper rubber)
• Length: 914mm (36 inches) — cuts to length
• Colour: Black
• Material: Flexible weatherproof rubber
• Fits Location: Upper sealing channel of the threshold bar
• Compatibility: Exitex DSS, Macclex, Slimline, Weatherten, MWK, MXS, MDS, OUD, Kleertred and Universal Mobility thresholds (see full part-number list above)
• Supplied As: Single 914mm roll
• Application: Replacement weather seal for uPVC, composite and timber entrance doors fitted with an Exitex aluminium threshold

Please check the part number stamped or labelled on your existing Exitex threshold before ordering to confirm this is the correct seal for your model. If you're unsure, measure the existing seal and contact us — we'll happily confirm compatibility before you buy.

Pro Tips:

Pro Tip: Before fitting the new seal, run a vacuum nozzle along the empty channel to clear out grit, old rubber crumbs and dust — debris in the channel is the most common reason a new seal won't seat flush. Cut the new length about 2–3mm longer than the channel and ease it in from one end with your thumb; the slight compression keeps it tight at the ends where draughts usually creep through.

Package Contents:

• 1 × Exitex Replacement Threshold Seal, 914mm, Black (Part 1.01.0361.0914.00)

Frequently Asked Questions:

How do I know if this is the right seal for my Exitex threshold?
Check the part number printed or labelled on your existing threshold bar — if it matches any of the codes listed in the Compatible Models section above (DSS, Macclex, Slimline, Weatherten, MWK, MXS, MDS, OUD, Kleertred or Universal Mobility), this seal is the correct replacement. If your threshold has no visible part number, take a photo of the profile and the existing seal and send it to us before ordering.

Will 914mm be long enough for a standard UK door?
Yes — most standard UK external doors have a frame width between 760mm and 900mm, so the 914mm (36-inch) length covers a standard opening with a little to trim off. For wider double doors or French doors, you may need to order more than one length.

How do I fit the replacement seal?
Pull the old seal out of the upper channel of the threshold (a flat-bladed screwdriver helps lift the end), clean the channel of any debris, then push the new seal into the channel from one end, working along its length. No adhesive or tools beyond a sharp knife for trimming are required. Most fits take under 10 minutes.

Why is my old threshold seal causing draughts?
Over time, repeated door closures compress the rubber and UV exposure causes it to harden, crack or take a permanent flattened set. Once that happens, the seal no longer makes firm contact with the underside of the door, and cold air and water can pass underneath. Replacing the insert restores the original airtight seal.

Is this a genuine Exitex part?
Yes — this is the original Exitex-manufactured seal under part number 1.01.0361.0914.00, the same insert originally fitted to the threshold ranges listed above. It matches the factory profile and rubber spec, so you avoid the fit problems often seen with generic aftermarket alternatives.

Why Choose the Exitex DSS Replacement Threshold Seal?

Exitex has been a trusted name in UK door threshold and weatherproofing hardware for decades, and choosing the genuine replacement insert means your repair lasts as long as the original. A worn threshold seal is one of the cheapest fixes you can make to your home, but it has an outsized impact — stopping draughts, blocking water ingress and helping cut heat loss at the most exposed point of your entrance.

At JCP Hardware, we've supplied uPVC and composite door replacement parts to homeowners and trade across the UK for over 30 years. Order with confidence — and if you're not sure which Exitex threshold you have, get in touch before you buy and we'll help you confirm fit.