Commercial Caulking Contractors in Toronto & the GTA
Sealing Success in every Structure
Your building deserves more than just caulking—it needs a durable, code-compliant seal. Costa Caulking brings 50+ years of specialized commercial experience to towers, mid-rise developments, retail plazas, institutions, and industrial sites. We match the right products and methods to each substrate and joint detail for performance that lasts. For façades requiring swing-stage, bosun’s chair or lift access, see our mid-rise and high-rise caulking services.
Bring our field-tested expertise to your next project.
Commercial Caulking Process — Video Walkthrough
Watch how Costa Caulking prepares substrates, installs backer rod, and applies commercial-grade sealants for curtain wall, precast, and masonry interfaces on GTA job sites.
Project Spotlight: Stopping Leaks at Rogers Centre
See how Costa Caulking helped address water leaks at the Marriott inside Rogers Centre with detailed commercial caulking and structural glazing sealant work. This project shows how proper preparation, product choice, and professional installation can help protect large buildings from water penetration and costly damage.
Built for schedules, specs, and safety
Precision scheduling to keep your projects on track.
We know schedules and communication is very important in running a job site. That’s why we have a dedicated foreman to assist at any time you need.
Use of top-grade, specified products for long-lasting results.
We install manufacturer-approved systems (e.g., Dowsil, Tremco, 3M, Hilti) matched to substrate, joint movement, and exposure—no corner-cutting, just tested assemblies.
A relentless focus on safety, minimizing risks on your work site.
Teams trained for swing stages and boom lifts with proper rigging and site orientations. Documentation on request: WSIB clearance, insurance, and certifications.
These points make Costa Caulking a solid choice for your building needs.
Comprehensive Commercial Services
Complete caulking, spray foam, and firestopping—tailored to the needs of commercial, institutional, industrial, and multi-residential properties.
Exterior Sealing
Exterior Sealing
Professional exterior sealing and recaulking for commercial buildings, condominiums and mid-rise and high-rise properties. We seal curtain walls, window walls, precast and stucco joints, glazing, hollow metal doors and control joints to help prevent water infiltration, air leakage and weather-related deterioration.
Firestopping
Firestopping
Professional firestopping for commercial, multi-residential and institutional buildings. We seal fire-rated joints and penetrations using appropriate systems, including mineral wool applications, slab-edge joints, top-of-wall assemblies and demising walls, helping maintain fire separations and limit the spread of fire and smoke.
Spray Foam Sealing
Spray Foam Sealing
Commercial spray foam sealing helps create an airtight, insulated barrier around windows, doors, vent boxes and other building-envelope openings. By filling gaps before exterior sealant is applied, spray foam can help reduce air leakage, drafts and moisture intrusion while improving the overall thermal performance of the building envelope.
Interior Finish Caulking
Interior Finish Caulking
Professional interior finish caulking for commercial common areas, suites and finished spaces. We seal joints around showers, doors, trim, baseboards and other interior transitions to create cleaner lines, help limit air and moisture movement, and support a more durable, polished finish throughout the property.
Seismic and Expansion Joints
Seismic and Expansion Joint Sealing
Specialized seismic and expansion joint sealing for high-rise and low-rise buildings, hospitals, schools, parking garages, bridges and walkways. These flexible joint systems accommodate significant structural movement while helping protect wall, floor and building-envelope joints from water infiltration, weather exposure and premature deterioration.
Condominium Recaulking
Condominium Corporation Recaulking
Professional condominium recaulking for property managers and condominium corporations planning building-wide or multi-building projects, including mid-rise and high-rise properties. We coordinate work carefully to minimize disruption to residents while managing access, scheduling and phased installations across occupied properties.
Harbour TEN10 | Whitby, ON
MV1 Condos | Milton, ON
Leeswood Construction Project | Brampton, ON
Sage 9 Condos | Waterloo, ON
Rogers Center
The Beer Store
Casinorama
Paramount Restaurant
Strip Mall Thorhiill
Loblaws Supermarket
Retirement Home Orillia
Tim Horton’s
Transform Your Building Today
Say goodbye to leaks, drafts, and wasted energy. Costa Caulking delivers precision, reliability, and lasting results—protect your property now.
(416) 898-8611
Costa Caulking—Your Building’s First Line of Defense.
