About Us

Precision Mastic Application for Modern House Builders

Built for Speed. Finished to Perfection.

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At Semdar Sealants, we specialise in high-quality mastic sealant application tailored specifically for house builders, developers, and construction professionals. We understand the demands of tight build schedules, strict compliance standards, and the importance of a flawless finish — and we deliver on all three.

 

Why Choose Us?

✔ Reliable Project Turnaround

We work in sync with your build programme, ensuring timely completion without delays or rework.

✔ Consistent, High-End Finish

Our experienced award winning applicators deliver clean, uniform lines that enhance the final presentation of every property.

✔ Site-Ready Teams

Fully trained, CSCS-certified professionals who integrate seamlessly into your site operations.

✔ Compliance & Durability

We use premium-grade sealants suited to NHBC standards, ensuring long-lasting performance across all applications.

 

Our Services

We provide comprehensive mastic and sealant solutions across residential developments, including:

• Internal sealing (kitchens, bathrooms, utility rooms, flooring)

• External perimeter sealing (windows, doors, brickwork)

• Expansion joints & movement joints

• Fire-rated and acoustic sealing

• Pre-decoration and finishing sealants

Whether it's a single unit or a multi-phase development, we scale with your needs.

 

Built Around House Builders

We don’t just work on sites — we understand them.

Our team is experienced in working with national and regional house builders, adapting to site schedules, health & safety protocols, and quality control processes. We aim to minimise snagging issues and help you deliver homes ready for handover.

 

Projects Delivered On Time, Every Time

From groundwork to completion, we ensure that sealant application never becomes a bottleneck. Our proactive communication and dependable workforce keep your project moving forward.

 

Let’s Build Better Together

Looking for a mastic application partner you can rely on?

Get in touch today to discuss your upcoming projects, request a quote, or arrange a site visit.