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.
Showcasing Our Stunning Project Creations!

Contact Us Today!
Ready to Get Started?
Let our team help you with your sealant needs. We ensure quality and satisfaction in every service we provide.




















































