SealOnce Basement System: 4ft Main Section

ITEM# SB4446


This is the Main Section of SealOnce Basement System – an easy to install, do-it-yourself basement waterproofing system that permanently dries up wet, leaky basements. This hollow PVC baseboard channel is bonded water-tight to your concrete floor using our exclusive SealOnce Adhesive to collect seeping water leaking through the joint where the floor and walls meet. The water is quietly drained away to your sump or floor drain.

*You order a custom kit based on your basement’s measurements. The cost for the system is about $6 per foot. Free shipping on $225 or more. 

Product Dimension

TALL: 4-1/4″

COLOR: Beige
(You could paint the system with a flat latex paint if desired.)


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. It’s designed as a do-it-yourself hollow PVC baseboard to collect the seeping water and quietly drain it to your floor drain or sump pump. These are the parts that make up the SealOnce Basement System.

Use the Official SealOnce™ Calculator to Order Your System

How To Order

Use our project calculator to create your custom SealOnce kit specific for your basement’s measurements. You only need 3 simple measurements: total linear footage, number of inside and outside corners. Free shipping on $225 or more!


SealOnce Basement System is an easy to install do-it-yourself basement waterproofing channel. There are no special tools or skills required ton install and you can complete the project in a weekend! Our full installation guide is included with every order and walks you through step-by-step on how to install the system. The video above shows you how easy the SealOnce Basement System is to install, especially now with our NEW Perfect SealOnce Tool! We designed and manufacture the Perfect SealOnce Tools to make installation easy and mess free.


Still have questions?
Call us. We’re here to help.

(651) 644-2000

Additional information

Weight 1 lbs
Dimensions 47.25 x 0.4 x 4.5 in