Certified Firestopping Solutions You Can Trust

At OJ Specialty Contracting, we provide expert firestopping and acoustical sealant systems for commercial and residential projects across California. Our team specializes in installing firestop sealants, fire-rated joint systems, through-penetration assemblies, intumescent coatings, and perimeter fire containment—all designed to meet stringent building codes and life safety requirements.

Why Firestopping Matters

Fire containment isn’t just a code requirement—it’s critical for protecting lives and property. Firestopping helps prevent the spread of fire, smoke, and toxic gases through walls, floors, and ceilings by sealing penetrations and joints in fire-rated assemblies. These passive fire protection systems work alongside active systems like sprinklers and alarms to keep your building safe and compliant.

How Firestopping Works

Firestopping creates compartments within a structure by sealing openings in fire-rated walls, floors, and joints. This helps maintain the fire-resistance rating of the assembly and slows the spread of fire.

Important: Firestop materials alone don’t carry a fire rating—the entire system (including penetrations, sealants, and surrounding components) must be tested and approved by agencies like UL.

What We Offer

We provide a full range of firestopping solutions for multifamily housing, commercial buildings, schools, labs, hotels, and more:

• Through Penetrations – Firestop and acoustical sealing for pipes, conduits, and ducts
• Joint Systems – Sealing for concrete, masonry, and gypsum assemblies
• Fire Caulking & Sealants – High-temperature acrylic and silicone sealants for smoke and gas control
• Intumescent Coatings – Expand under heat to protect structural steel
• Fire Wrap Blankets – Protects kitchen exhaust, ventilation, and dryer ducts
• Endothermic Wraps – Safeguards critical systems like DAS conduits and fuel piping

Pre-Construction Support

We don’t just install—we partner with you from the start. Our team offers design consultation, code compliance guidance, and submittal packages to streamline your project. We provide:

• Certified installation logs
• Identification tags
• Documentation for smooth closeout

Why Choose OJ Specialty Contracting?

• Certified Firestop Contractors with training from leading manufacturers
• Single-source solutions to reduce liability and simplify documentation
• Decades of experience serving California builders and developers

Ready to protect your project?

Call 760-839-3200 or contact us online to schedule a consultation.