When you think of sustainable buildings, what comes to mind? Solar panels, thick insulation, maybe even green roofs. But sealants – often overlooked – are essential for creating airtight, energy-efficient buildings.
Sealants are a small but vital part of creating buildings with a low carbon footprint. By preventing air and moisture leaks, they help buildings achieve higher energy performance and durability.
In both commercial and residential applications, choosing the right sealant – and using it effectively – can significantly contribute to net-zero energy goals and overall sustainability.
The secret to energy savings
Tiny gaps around windows, doors, walls, roofs and other junctions might not seem like a big deal, but they can let valuable heated or cooled air escape – forcing your heating, ventilation and air conditioning system (HVAC) system to work harder and driving up energy bills.
Think of your building like a flask – if it leaks, it can’t keep things hot or cold.
High-performance sealants are the unsung heroes that close these gaps, creating a continuous barrier against uncontrolled air leakage, optimising HVAC efficiency and lowering utility costs and emissions.
Moisture control is equally critical. By sealing joints and cracks against rain and humid air outside, sealants keep insulation and structural materials dry, protecting them from moisture damage and mould.
Choosing sustainable sealants
Not all sealants are created equal. There are a range of options, each with different chemistries, that can be used with sustainability in mind:
- Silicone sealants: Durable, UV-resistant, and flexible, ideal for exterior building envelopes. They provide long-lasting seals, reducing replacement frequency.
- Acrylic sealants: Water-based and low-VOC, suitable for residential and interior use with a lower environmental footprint.
- Hybrid sealants: Combine the best of silicone and polyurethane without harmful solvents or isocyanates, offering strong adhesion and excellent environmental performance.
Sustainability beyond the tube
Sustainability isn’t just about what’s inside the tube. Manufacturers are making big strides in creating environmentally responsible products from production through to application.
Many are switching to renewable energy, using bio-based ingredients and offering solvent-free formulas. Even packaging is getting a green makeover – foil sausage packs, for example, can reduce packaging waste by up to 97% compared to traditional cartridges.
Some companies are also introducing recycling programmes, while an industry-wide commitment to providing clear environmental certifications like GREENGUARD and EMICODE is making it easier for builders and homeowners to make responsible choices.
What can builders and homeowners do?
Whether you’re a builder, architect, or homeowner, you can make a difference:
- Choose certified, sustainable sealants with low VOCs and eco-friendly packaging.
- Seal all joints and gaps – especially around windows, doors, and roofs – to maximise energy savings.
- Ask suppliers about recycling programmes for used packaging.
Sealants may be a small part of the construction process, but their impact on energy efficiency, building longevity, and sustainability is huge. Next time you’re planning a project – big or small – remember that choosing the right sealant is a simple, powerful way to build a greener future.
