About Us

Proper Sealants LTD

Professional Sealant, Fire-Stopping & Air Tightness Specialists

Built on decades of industry experience, Proper Sealants LTD delivers high-quality sealant, fire-stopping, air-tightness, and domestic mastic solutions across residential, commercial, and industrial projects.

Founded in 2025, we combine the standards of major developments with the care and attention homeowners expect.

Why Proper Sealants?

🛠️ Qualified. Experienced. Reliable.

Our NVQ-certified operatives are trained to deliver professional results on everything from domestic resealing works to complex fire-stopping and air test preparation on large developments.

🔥 Fire Safety & Compliance

We carry out fire mastic and fire-stopping installations in line with current UK regulations and manufacturer specifications—ensuring safety-critical elements are installed correctly.

🌬️ Air Test & Airtightness Works

We provide specialist mastic sealing to support air-tightness testing, helping new build properties meet required air permeability targets and pass air tests efficiently.

🏠 Domestic Mastic Services

We offer clean, professional mastic services for homeowners, including the cutting out and removal of old, failed, or mouldy silicone, replaced with high-quality new sealant for a fresh, durable finish.

🤝 Trusted by Leading Developers

We are proud to work alongside Vistry Group on major developments, delivering consistent quality and professionalism on live sites.

Our Services

• Internal & External Mastic Application

• Fire Mastic & Fire Stopping

• Air Test Mastic & Airtightness Sealing

• Domestic Resealing (Removal & Replacement of Old Silicone)

• New Build Residential & Commercial Projects

The Proper Way

Attention to detail. Clean finishes. Compliance-driven work—delivered properly, every time.

Proper Sealants LTD — From family homes to major developments.