Shower Door Sweep Replacement: Types, Sizes and How to Install
Last updated October 2026 · Best Glass Parts Guide Team, Edmonton
Quick answer: to replace a shower door sweep, measure your glass thickness (6, 8, 10 or 12 mm), identify where the seal sits and how the door meets the next surface (curb, wall, or glass at 90°, 135° or 180°), then buy the matching profile, cut it to the width of the glass and push it on with the fin facing into the shower. Most replacements take about 15 minutes with a hacksaw and a tape measure.
A worn sweep is the most common reason a frameless shower starts leaking onto the bathroom floor, but buying the wrong profile is the most common reason the fix fails. This guide covers how to tell whether the sweep is really the problem, the main sweep and seal types, and a step-by-step replacement.
Key takeaways
- Measure the glass, not the old sweep. Common thicknesses are 6 mm (1/4"), 8 mm (5/16"), 10 mm (3/8") and 12 mm (1/2").
- Bottom sweeps for swing doors, slider seals for sliding doors, and magnetic or H-profile seals for vertical edges are different parts. They are not interchangeable.
- Magnetic seals are matched to the angle where the door meets the next panel: 90°, 135° (neo-angle) or 180° (inline).
- Most sweeps come in 96" lengths and are cut down to the width or height of your glass.
- The fin or drip lip faces the inside of the shower so water runs back in.
Is it the sweep? Other reasons a shower door leaks
Before you buy a new sweep, rule out the other common causes. Glass installers point to a handful of usual causes besides the sweep itself (Fab Glass and Mirror):
| Where the water appears | Likely cause | Fix |
|---|---|---|
| Under the middle of the door | Worn, torn or missing bottom sweep | Replace the sweep (this guide) |
| At the bottom corners | Sweep cut too short, or a missing side seal | Re-cut a longer sweep, or add a vertical seal |
| Down the hinge or strike side | Missing or worn vertical seal | Fit an H-profile, bulb or magnetic seal |
| Where two glass panels meet | Gap between panels with no seal | Fit a glass-to-glass seal matched to the angle |
| Along the base of fixed panels | Failed silicone caulk | Remove old caulk, clean, dry and re-seal |
| Water runs outward across the curb | Curb not sloped back toward the shower | Tile repair by a professional |
Shower door sweep and seal types explained
Shower door seals are named for their shape and where they sit (Angi). These are the profiles you will see when shopping:
- Bottom sweep / drip rail: sits on the bottom edge of a swing door, with a fin or angled lip that directs water back into the shower.
- Bulb or D-profile: a rounded bulb that compresses when the door closes for a soft, tight seal. Used on bottoms and sides.
- Fin seal: a single flexible fin, available in different lengths to cover different gap sizes.
- H-profile (jamb seal): wraps the glass edge and seals vertical gaps between the door and a wall or panel.
- L, T and V profiles: shaped seals, often self-adhesive, for corners, double-fin sealing or framed grooves.
- Magnetic seal: strips with magnets that pull the door closed against the next panel. Made for a specific meeting angle.
- Slider seal: a low-friction seal for the bottom of a sliding panel that lets it glide.
Signs your shower door sweep needs replacing
- Water on the floor after a shower, especially at the corners of the door.
- A fin that is cracked, torn, stiff or no longer touches the curb.
- Yellowing or mineral crust that will not clean off.
- A sweep that keeps sliding along the glass or falling off.
Cracked vinyl cannot be reliably repaired, so replacement is the practical fix (Dulles Glass). In Edmonton, hard water speeds up wear. EPCOR's August 2025 water quality summary reports total hardness averaging about 170 mg/L as calcium carbonate (EPCOR), which falls in the "hard" band of 121–180 mg/L on the U.S. Geological Survey scale (USGS). The mineral scale it leaves builds up on seals and glass edges.
What you need
- The replacement sweep or seal for your glass thickness
- Tape measure, and a caliper if you have one
- Fine-tooth hacksaw or sharp snips
- Scale remover, glass cleaner and a lint-free cloth
- A door wedge to hold the door open
Step 1: Measure your glass thickness
Every push-on sweep is made for a specific glass thickness. A sweep made for 10 mm glass will fall off 8 mm glass, and one made for 8 mm will not fit onto 10 mm. Measure the edge of the door with a caliper or a ruler held flat against the glass.
| Metric | Imperial | Typical use |
|---|---|---|
| 6 mm | 1/4" | Sliding tub doors, framed and semi-frameless doors |
| 8 mm | 5/16" | Frameless swing and sliding doors, neo-angle enclosures |
| 10 mm | 3/8" | Most custom frameless shower doors and panels |
| 12 mm | 1/2" | Heavy frameless panels and partitions |
Some profiles list a range, such as 8–10 mm. Check the product details before you order.
Step 2: Work out where the seal goes
- The bottom of the door, against the curb or tub ledge. This is the classic "sweep".
- The hinge side, where the door meets the wall or a fixed panel.
- The strike side, where the door closes against a wall or panel.
- Panel-to-wall joints on fixed glass and partitions.
Frameless doors are hung with deliberate gaps so the glass can swing safely without touching the curb, wall or next panel. There is no single industry standard for those gaps, and they range from a few millimetres to more than 30 mm depending on the enclosure (Shower Door Seal). Measure your gap at both ends and the middle with the door closed. A longer fin covers a bigger gap, but too long a fin makes the door drag.
Step 3: Match the profile to your door
Use this table to find the right part. Every link goes to the product page, where you can choose clear or black.
| Your situation | What to look for | Options |
|---|---|---|
| Bottom of a swing door, 8 or 10 mm glass | Bottom sweep with a drip lip or fin | 8 mm swing door sweep, 10 mm swing door sweep, 8 mm D-profile, 10 mm D-profile, 10 mm S-shape, 8 mm centre flap, 10 mm centre flap, 8–10 mm adjustable middle flip |
| Bottom of a swing door, 6 mm glass | Long flap or adjustable sweep | 6 mm long flap, 6 mm adjustable middle flip |
| Bottom of a sliding door | Slider seal that does not drag | 8 mm slider seal, 10 mm slider seal, 8 mm slider with 1/2" fin, 10 mm slider with 1/2" fin |
| Door closes in line with a fixed panel (180°) | 180° magnetic seal or H-profile | 6 mm magnetic 180°, 10 mm magnetic 180°, 10 mm small H, 10 mm large H, 8 mm large H |
| Door closes against a return panel at 90° | 90° magnetic or 90° partition seal | 10 mm magnetic 90°, adhesive 90° partition sweep (10 or 12 mm) |
| Neo-angle enclosure (135°) | 135° magnetic or angled sweep | 8 mm neo-angle magnetic 135°, 10 mm magnetic 135°, 10 mm sweep 135°, neo-angle bottom sweep, neo-angle back side sweep |
| Door meets glass at 45° | 45° magnetic seal | magnetic 45° |
| Fixed panel or partition against a wall | Partition wall seal | 10 mm partition seal (120"), 12 mm partition seal (120") |
| 10–12 mm glass, or no room for a push-on profile | Self-adhesive profile | adhesive L, adhesive T double fin, adhesive D, adhesive V 3/4" |
| Framed pivot door | Pivot bottom seal | M6184 pivot bottom seal with drain |
You can also browse every profile in one place in our shower door sweeps and bottom seals collection.
How to check the angle for a magnetic seal
Two showers can use the same 8 mm glass and still need different magnetic seals, because the seal is shaped for the angle where the glass meets. Stand above the closed door and look down at the joint. A straight line is 180°, a square corner is 90°, and the angled corner of a neo-angle shower is 135°. Glass thickness, the gap when the door is closed and the meeting angle all need to match (Sip the Style). Magnetic seals work by two magnetic edges meeting, so check whether the other side of the joint also needs a strip. If you have a neo-angle shower, our guide to neo-angle shower doors explains how those enclosures are laid out.
Step 4: Remove the old sweep and clean the glass
- Open the door fully and wedge it so it cannot swing.
- Slide the old sweep off the end of the glass. If it is stuck, work it loose gently. Do not pry against the glass edge with metal tools.
- Clean the bottom edge of the glass. Mineral scale left on the edge stops the new sweep from seating. A scale remover such as our glass water scale remover works, and a final wipe with glass cleaner leaves the edge clean.
- Dry the glass completely. If you are installing an adhesive profile, the surface also needs to be free of residue.
Step 5: Cut the new sweep to length
- Measure the width of the glass panel itself, not the opening.
- Mark the sweep and cut it off the door with a fine-tooth hacksaw or sharp snips. Keep the cut square.
- Cut a little long first. You can trim again, but you cannot add length. If the door rubs the wall or the next panel when it swings, take off another millimetre or two.
- For neo-angle doors, the ends may need angled cuts to follow the corner. Hold the sweep in place and mark it before cutting.
Step 6: Install and test
- Push the sweep onto the glass from one end, or slide it on along the edge, until it is fully seated along its length.
- Point the fin or drip lip toward the inside of the shower so water drips back in.
- Close the door slowly. The fin should just touch the curb without making the door drag or bounce open.
- Run the shower for a minute and check the floor and corners for leaks.
Troubleshooting a new shower door sweep
- The door drags or will not stay closed: the fin is too long for your gap. Try a shorter fin profile, or a sliding seal for a sliding door.
- It still leaks at the corners: the sweep may be cut too short, or water is escaping through a vertical joint that needs its own seal.
- The sweep slides off: it is made for thicker glass than yours. Re-measure the glass and order the correct size.
- The magnetic seal will not close: it was made for a different angle, or the hinge needs adjusting so the edges line up.
How long does a shower door sweep last?
Glass installers commonly put the life of a vinyl or PVC sweep at about two to five years, depending on the material, how often the shower is used and how it is cleaned (Dulles Glass, Glass Shower Direct). Harsh cleaners and hard water shorten that. To get the most from a new sweep:
- Squeegee the glass and wipe the fin after showers.
- Avoid bleach and abrasive pads on the seal.
- Clean the bottom edge every few weeks so scale does not build up. Our guide on cleaning shower door hinges and hardware covers the rest of the enclosure.
Frequently asked questions
Can I cut a shower door sweep to size?
Yes. Sweeps are sold in long lengths, usually 96 inches, so they can be cut to fit. Use a fine-tooth hacksaw or sharp snips and make the cut off the door, keeping it square.
Which way should a shower door sweep face?
The fin or drip lip goes toward the inside of the shower, so water running down the glass is directed back into the shower instead of onto the floor.
Is a 10 mm shower door sweep the same as 3/8 inch?
Yes. 10 mm is the metric size for 3/8 inch glass, 8 mm is 5/16 inch, 6 mm is 1/4 inch and 12 mm is 1/2 inch.
Do frameless shower doors need a sweep?
Almost always. Frameless doors are hung with small gaps so the glass can swing without touching the curb, wall or next panel. A bottom sweep and side seals close those gaps and keep water in.
How big is the gap under a frameless shower door?
There is no single industry standard. Gaps on frameless enclosures range from a few millimetres to more than 30 mm depending on the design and how level the curb is, so measure your own gap at both ends and in the middle before choosing a fin.
What is the difference between a shower door sweep and a seal?
A sweep usually means the bottom piece with a fin that brushes the curb. Seal is the broader term and also covers H-profile, bulb, fin and magnetic seals on the vertical edges of the door.
How often should you replace a shower door sweep?
Glass installers commonly put the life of a vinyl or PVC sweep at about two to five years. Hard water, bleach and abrasive cleaning shorten that.
Should I choose a clear or black shower door sweep?
Clear blends into clear glass. Black suits matte black hinges and handles. Most of our sweeps come in both colours.
Need help finding the right sweep?
If you are not sure which profile you have, send us a photo of the bottom of your door and a measurement of the glass thickness. Browse our full shower door sweeps and bottom seals range, see the rest of our frameless shower door hardware, or read about our shower door parts in Edmonton. Best Glass Parts ships across Canada, offers pickup in Edmonton, and glaziers and contractors can ask about trade pricing.
Sources
- EPCOR – Edmonton water quality monthly summary, August 2025
- U.S. Geological Survey – Hardness of water
- Fab Glass and Mirror – Leaking shower door: common causes and solutions
- Angi – Types of shower door seals
- Shower Door Seal – Gaps at the bottom of frameless shower doors
- Dulles Glass – Shower door sweep: repair or replace?
- Glass Shower Direct – How to replace a shower door sweep
- Sip the Style – When the glass angle throws off a magnetic shower seal
