SealOnce Basement Waterproofing System
Starting at $8 per ft
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SealOnce Basement System is an easy to install, do-it-yourself basement waterproofing channel that permanently dries up wet, leaky basements.
Hollow baseboard channel is bonded watertight to the concrete floor collecting seeping water and drains it away to a sump pump or floor drain.
✔ No busting up your basement floor.
✔ Easy DIY installation.
✔ Permanent waterproofing system.
✔ Trusted by homeowners and contractors since 1965.
✔ Made in the USA. Sold factory-direct.
Dimensions & Specs
- Length: 4′
- Height: 4-1/4″
- Overall Depth Once Installed: Widest point will be at the bottom where it will sit out from the wall about 1-1/4″ to 1-1/2″
- Color: Tan (can be painted with a flat latex paint)
- Material: PVC (High-strength recycled from exterior home siding)
ADHESIVE
- Material: Tin-based Urethan
- Color: Tan
- Odorless
- Cure time: Sets up in 24 hours. Fully cured in 72 hours.
- Installation: Can be installed in damp conditions. Do not install in standing or running water.
Resources
AS SEEN IN
Build Your Custom SealOnce Basement System Kit:
Use our kit calculator below to make your custom SealOnce Basement Waterproofing System based on your basement’s measurements.
Get Your Custom Quote
Enter your basement info here
SealOnce Basement System
Your Custom Kit
$0.00
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Main Sections (4-foot lengths) |
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Waterproofing Adhesive |
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Inside Corners |
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Outside Corners |
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Butt-joint connectors (5-pack) |
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End Caps |
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Drain Port (23-inch length) |
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Tool Kit |
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Installation Guide
How it Works
FAQ's
Waterproof your basement permanently for less than $1,000 – and it only takes a weekend!
SealOnce Basement System is ideal for basements that leak water through the joint were the floor and walls meet. When soil around your foundation becomes water-saturated, hydrostatic pressure forces water up through the joint where your floor and walls meet. The SealOnce Basement System can cure that problem without busting up your floor.
What’s Included with Your Kit
The custom kit arrives complete with 4-foot main channel sections, powerful, odorless SealOnce Adhesive pre-molded inside and outside corners, butt-joint connectors, universal end caps, a drain port and Perfect Seal tool kit. Kits are configured based on your basement’s dimensions—so you get exactly what you need.
Why choose the SealOnce Basement System?
Bonds In Wet Or Dry Conditions
SealOnce Adhesive is our specially-formulated waterproofing adhesive that bonds water-tight in wet or dry conditions.
Odor-Free Adhesive
Our SealOnce Waterproofing Adhesive has no solvents or smell, which makes it a safe choice when working in a basement.
High-Strength Recycled PVC
SealOnce Basement System main sections and components are made with a PVC regrind material with support strength and durability.
50+ Years Of Proven Success
Our original baseboard waterproofing channel helped homeowners dry up their wet, leaky basements starting in 1965.
Ideal Solution To Leaky Cold-Joints
SealOnce Basement System is ideal for wet basements that leak water through the joint where the floor and walls meet, also known as the cold-joint in a basement.
Easy DIY Installation
Our installation guide and videos walk you through step-by-step on how to waterproof your basement no matter your skill level, you can do it yourself!
Order Parts
Order individual parts for the SealOnce Basement System below.
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SealOnce Basement System: 4ft Main Section
$14.99Add to cart -
SealOnce Basement System: Inside Corner
$8.99Add to cart -
SealOnce Basement System: Outside Corner
$8.99Add to cart -
SealOnce Basement System: End Cap
$3.99Add to cart -
SealOnce Basement System: Butt Joints (5 Pack)
$8.99Add to cart -
SealOnce Adhesive (10oz)
$10.99Add to cart -
SealOnce Basement System: Drain Port (23in)
$11.99Add to cart -
Perfect SealOnce Tool Kit
$10.99Add to cart -
SAMPLE KIT SealOnce Basement System
$15.00Add to cart -
SealOnce Roto-Stripper Drill Attachment for Paint Removal
$24.95Add to cart
Do you also need?
Tiny Titan Sump Pump Kit
Compact, yet powerful sump pump kit that includes 1/3HP cast iron sump pump, check valve, 16×16 basin with cover and high water alarm. Ideal drain outlet for the do-it-yourself SealOnce Basement System.
UnderGround Downspout Kit
Keeps roof water runoff away from foundation and eliminates the hassle of downspouts laying across your lawn. Proper exterior drainage is a key element to maintaining a dry basement.
VaporBright Wall Moisture Barrier
Designed for crawl space encapsulation, this DIY kit includes high-quality plastic sheeting to seal off moisture and protect your home’s foundation. Ideal for keeping your crawl space dry and preventing mold growth, it’s the perfect addition to your waterproofing project.
Basement Waterproofing Without Busting Up Your Concrete
SealOnce Basement System offers permanent solutions for homeowners. SealOnce Basement System works by collecting the seeping water coming in through the joint where the floor and walls meet. SealOnce Basement System is a narrow, hollow baseboard channel, with the widest point at the bottom being 1-1/2″ out from your basement walls. This tall, narrow channel allows for small amounts of water inside the system to build up quickly in height versus the way water plains out over your basement floor staying stagnate in puddles. As water builds up in height, it naturally self-levels, seeking the lowest point in the basement, guiding it toward the drainage system – either your sump pump or floor drain.
Easy to install. Ideal for basements that leak water through the joint where floor and walls meet.
Quick Installation Overview
Prep Your Basement
Proper preperation of your basement floor is key to installing the system. You’ll start by relieving the hydrostatic pressure in the basement walls. Next, you’ll clean the floor very well with just water and a sponge to remove all fine dust and debris.
Install SealOnce Basement System Channel
You’ll receive a detailed instruction booklet with your order that will walk you through each step in detail to give you the confidence to waterproof your basement like a professional. Click the button below to see the full guide.
Drain Your System
Once you’ve installed your SealOnce Basement channel around the perimeter of your basement, you’ll need to drain it to your sump pump pit or floor drain. We’ll show you how to connect the system using our Drain Port to your chosen drain outlet.
Frequently Asked Questions
For many homeowners the SealOnce Basement System is the first time they’ve had access to a professional-grade basement water control system they can install themselves and often have a few questions. Below are answers to the most common questions first time homeowners ask.
How will water flow if my basement floor is uneven?
Will water remain standing inside the SealOnce Basement System?
I have never done a DIY like this before. Should I just hire a professional?
Will the SealOnce Basement System require maintenance?
How long will the SealOnce Basement System last?
Why do I need to drill weep holes?
Hydrostatic pressure is relieved in block wall foundations by drilling weep holes in the concrete block cavities at floor level. The hollow DIY basement waterproofing channel collects the seepage. The baseboard is not attached to the wall, it allows air to circulate within the block cavities to help keep them dry. It also provides a source of disposal for upper-wall moisture to enter the channel.
How will the SealOnce Basement System work with poured concrete, brick or stone walls?
SealOnce Basement System works with any type of basement wall because the main sections are not glued to the walls. They simply rest against the face of basement walls. The top of the system is left open to allow any water seepage from the face of the walls to enter the system. The top the main section curls back creating a mini-trough directing the water behind and into the channel.
Can I finish my basement after installing the SealOnce Basement System?
Avoid This Common DIY Mistake:
As the soil around your foundation becomes water-saturated, hydrostatic pressure forces water through the joint where your floor and wall meet. SealOnce Basement System can cure that problem. Designed as a hollow baseboard, this easy to install DIY basement waterproofing channel collects the seeping water and quietly drains it to your floor drain or sump pump.
The only skill needed for installation is the ability to follow directions. Just seal the pre-molded corners and easy to handle main sections to the floor using the SealOnce Adhesive. With the SealOnce Basement System in place, walls can easily be paneled or finished. Drying up your wet basement is the first step towards a clean and healthy room ready for living, storage, and play. The SealOnce Basement System can turn your wet basement into a comfortable room suitable for your home and family.
Real People. Proven Performance.
Trusted by over 10,000 homeowners to dry up their wet basement. Millions of feet installed across the US and Canada since 1965. From the Hoover Dam, Fort Knox, US Embassy, Mercer County Housing, Minnesota Historical Society and several colleges and universities across the United States.
One neighbors house was merely 10′ away and both rooflines dumped into this narrow breezeway. This was also the only avenue of escape for all of the water in the backyard. She often joked about her “water feature” which was located in the basement.
Over the course of 12 years she spent 1000’s of dollars on gutters and landscaping, including hiring a landscape architect who installed many deep-rooted plants and even a French drain. Even with all of this she still had problems. Being a contractor I knew that there had to be something I could do, and after much research I found this amazing product.
It was easy to order, easy to install and has worked amazingly!! Drying up the basement allowed me to fix all of the ruined drywall, lay new carpet and flooring, and reclaim the basement as usable space in a tiny 750 square foot home. Directions are very simple and the average do-it-yourselfer could perform it themselves.
HOW SEALONCE COMPARES
Waterproof Paints vs SealOnce vs Contractor Installed Drain-Tile
SealOnce Basement System is a better long-term solution than waterproof coatings, basic concrete sealer or waterproofing paints, which only provide temporary fixes for basement moisture issues. Unlike systems that require contractor-installed setups, jackhammers and days of labor, SealOnce Basement System offers a permanent solution that’s easy to install in over a weekend, making it quicker and more cost-effective without sacrificing quality or durability.