Canada’s First LIFETIME
No Crack, No Peel GUARANTEE
10,000+ homes sealed across the GTA since 1974.
Your Windows Aren’t the Problem.
Your Caulking is.
Drafts in winter. Bugs in summer. Energy bills climbing year over year. Most homeowners assume they need new windows ($15,000 to $40,000). They don’t.
90% of the time, the issue is a failing caulking around the frame. Cheap caulking dries out, cracks, and peels within a few years, letting air, water, and pests back in.
You don’t need new windows. You need a seal that actually lasts.
Why ForeverSeal®
Why Most
Caulking Fails
Cheap Off-Brand Sealant
Low-grade materials break down fast.
Sun & UV Exposure
Causes cracking and loss of adhesion.
Structure Settlement
Windows shift, gaps reopen.
Technician Error
Surface wasn’t prepared properly.
Why Costa
Caulking
ForeverSeal® Certified Technicians
A Guarantee* You Can Count On
50+ Years of Proven Experience
Over 10,000 Homes Sealed Across the GTA
Chosen by Homeowners Who Want it Done Right the First Time
Packages
Choose The Seal That
Fits Your Home
Window replacement: $15,000 – $40,000 Professional home re-caulking: starting at $99/opening
Reliable & Affordable
Builder Grade Caulking
Standard Joint Backing
(Foam/Backer Rod)
10-Year Guarantee*
Practical Protection
Most Popular!
Upgraded Premium Long-Life Sealant
Standard Joint Backing
(Foam/Backer Rod)
Built to Last Decades
LIFETIME NO CRACK, NO PEEL GUARANTEE
If it cracks or peels, we come back and fix it for free
Best Value!
Upgraded Premium Long-Life Sealant
ThermaSeal Spray Foam
(Upgrades window energy efficiency)
CritterGuard Protect
(Seals other unwanted entry points to keep out pests and bugs)
Built for maximum efficiency and Durability
LIFETIME NO CRACK, NO PEEL GUARANTEE
If it cracks or peels, we come back and fix it for free
Our Promise, in Writing
If any seal we apply ever cracks or peels, we come back and redo it. No questions. No charge. No expiry date*. Canada’s first lifetime caulking guarantee. Nobody else offers this because nobody else can back it up with 50+ years of experience.
Don’t take our word for it–read our guarantee in full.
*Terms, eligibility requirements and exclusions apply.
What Homeowners
Are Saying
“We were quoted $22,000 for new windows. Costa came out, re-sealed everything in a day, and our drafts are completely gone. Should have called years ago.”
Maria & Tony R.
Vaughan, ON
“The crew was fast, clean, and
explained everything. The lifetime guarantee sold us. Three winters later, every seal
still looks brand new.”
James P.
Oakville, ON
“Bugs kept getting in around our basement windows. ForeverSeal Plus fixed it completely. Haven’t seen a single one since.”
Priya S.
Mississauga, ON
We Book 4-6 Assessments
Per Week. Grab Your Spot.
Free, no-pressure assessment.
We’ll check your caulking and walk you through your options.
CALL OR EMAIL TODAY
(416) 898-8611 | foreverseal@costacaulking.com