The Best Garage Door Seal

Floor Seal
Universal Garage Door Bottom Threshold Seal Strip,Weatherproof Rubber DIY Weather Stripping Replacement, Not Include Sealant/Adhesive (20Ft, Black)
Rubber
Garage Door Seals Bottom Rubber Weather Stripping Kit Seal Strip Replacement,Universal Weatherproof Threshold Buffering Sealing Rubber 5/16" T Ends, 3 3/4" Width (16 Ft)
Channel & Rubber
10FT Heavy-Duty U Ring Shape Universal Garage Door Bottom Rubber Seal - Weatherproof Weather Seal Threshold Strip with Pre-drilled Aluminum Track Retainer Base Kit
Universal Garage Floor-Door Seal
Garage Door Rubber Replacement Kit
Garage Door Channel and Rubber Replacement Kit
Floor Seal
Universal Garage Door Bottom Threshold Seal Strip,Weatherproof Rubber DIY Weather Stripping Replacement, Not Include Sealant/Adhesive (20Ft, Black)
Universal Garage Floor-Door Seal
Check Price
Rubber
Garage Door Seals Bottom Rubber Weather Stripping Kit Seal Strip Replacement,Universal Weatherproof Threshold Buffering Sealing Rubber 5/16" T Ends, 3 3/4" Width (16 Ft)
Garage Door Rubber Replacement Kit
Check Price
Channel & Rubber
10FT Heavy-Duty U Ring Shape Universal Garage Door Bottom Rubber Seal - Weatherproof Weather Seal Threshold Strip with Pre-drilled Aluminum Track Retainer Base Kit
Garage Door Channel and Rubber Replacement Kit
Check Price

The best door seal will depend on whether the garage door still has the threshold channel. You can get a new channel, the rubber for the channel, or just put rubber on the floor.

Diagram of how the channel holds the rubber
Diagram of how the channel holds the rubber

Watch Out 1: If your garage floor has a deep dip under the door, a standard rubber seal will not fill that gap. The channel is stiff and straight, and it will actually pull the door bottom back up where it might have been sagging before. The best course is to re-surface the floor, but barring that, put down a floor seal as well as a channel replacement to fill in big gaps.

Watch Out 2: Use a soapy solution to pull the rubber through the channel. The rubber has good friction to prevent movement. It’s going to fight you when you pull it from one end to the other. Soak the rubber in soap or create a soapy spray to grease things up while you work.

Run the floor seal all the way to the end to avoid gaps. Now rubber can fill unusually large gaps.
Run the floor seal all the way to the end to avoid gaps. Now rubber can fill unusually large gaps.

The Best Garage Floor Seal

The easiest and solution is to add a rubber seal to the garage floor where the door bottom meets the floor. You can do this whether or not there’s a channel on the door bottom. The door squeezes into the rubber, which pops up a bit to keep out wind and water.

I like the Universal Garage Door Threshold Seal for this job. Like most floor seal kits, it does not come with glue, so if you want to use an adhesive, you can separately choose the brand and color you want. Floor seals that include adhesive force you to use whatever color they send you. I prefer clear or black either Liquid Nails or Gorilla Glue. Click to view this seal on Amazon.

Floor seals have a middle hump to allow water to slide down and off outside
Floor seals have a middle hump to allow water to slide down and off outside. Use Liquid Nails to solidify the seal, but many owners find these kits work fine on their own.

The Best Garage Door Rubber Seal Replacement

I like the Universal rubber kit because it has a healthy amount of rubber to fill in larger gaps. Not that any rubber should fill in very significant gaps, but this one goes a bit farther than others with less material.

This is the rubber replacement installed into the existing door channel
This is the rubber replacement installed into the existing door channel

If you have the door channel but not the rubber, then you can get a rubber kit that slides into the existing channel. The door already has a channel, so you need only thread the rubber through the channel and cut off any excess. The hardest part is threading rubber without soapy water. Don’t do it. The rubber resists movement, that’s how it keeps out the rain. Use a spray bottle of soapy water to make this an easy job. Click to see the rubber replacement kit on Amazon.

You will thread the rubber through the existing channel.
You will thread the rubber through the existing channel.

The Best Garage Door Channel Seal Replacement

The best solution is if the channel is missing is a channel-seal combination. You screw the top plate into the bottom of the door. If you need to thread the rubber through the channel, spray it with soapy water first. It’s a one-piece solution to replacing the channel as well as the rubber.

The kit I like has pre-drilled screw holes
The kit I like has pre-drilled screw holes

I like the Universal Door Channel replacement kit for wood or steel doors. It includes pre-drilled screw holes. The aluminum track holds the o-ring rubber that is sturdy down to -40 deg. F.

If the channel is solid but the rubber is missing, then the best solution is to get a threshold seal replacement. The trick to installing this type of threshold seal is to soak it in soapy water before installation. Rubber has a lot of friction. The soap allows you to slide the rubber through the channel without constantly hanging up along the way. Click to see the channel and rubber replacement kit on Amazon.

Use soapy water to thread the rubber into the channel
Use soapy water to thread the rubber into the channel