Internal Window Caulking
Clean lines. Seamless finish. Extra insulation.
At Watertight Caulking, we specialise in precise internal window caulking for homes and projects across Melbourne. Caulking the internal perimeter of your windows doesn’t just improve energy efficiency — it also enhances the overall look of your space.
By professionally sealing the gap between the window frame and the wall (typically plasterboard), we create a smooth, seamless edge that looks clean and refined. Done properly, it adds a sharp, finished appearance to your window while reducing drafts and improving insulation.
For the best visual result, we recommend colour-matching the sealant to your wall paint rather than the window frame. This approach helps the caulking blend naturally into the surface, leaving your windows with a crisp, subtle finish.
Want your windows to look flawless inside and out?
Let our expert team take care of it — with care, precision, and attention to detail.
External Window Caulking
Seal and protect your home from the elements.
External window caulking is essential for preventing water leaks, drafts, and dust from entering your property. At Watertight Caulking, we recommend sealing all exterior window joints to improve weather resistance, energy efficiency, and long-term durability.
Our experienced team uses high-quality sealants and precise application to ensure a clean, lasting finish — every time.
Benefit 1:
Keep Insects Out
Proper window caulking helps seal gaps that can let bugs and insects into your home. Unsealed windows create easy entry points — especially in areas like kitchens where pests are most unwanted. By sealing these spaces, you create a cleaner, healthier, and more comfortable living environment.
Benefit 2:
Improve Energy Efficiency
Well-sealed windows help regulate indoor temperature by preventing drafts and heat loss. This means your home stays warmer in winter and cooler in summer — reducing your reliance on heating and cooling systems, and helping to lower your energy bills.
Benefit 3:
Prevent Water Damage
External caulking acts as a protective barrier against rain and moisture. Without it, water can seep into gaps around your windows, leading to rot, mould, and long-term structural damage. Caulking helps protect your property and extend the life of your building materials.
Benefit 4:
Enhance Appearance
Clean, professionally applied caulking gives your windows a polished, seamless look. It covers unsightly gaps and cracks, instantly improving the overall finish of your interiors or exteriors — adding both visual appeal and value to your property.
How We Improve the Look and Protection of Your Windows
At Watertight Caulking, we take a careful, detail-oriented approach to window caulking — combining the right materials with expert techniques to ensure a flawless finish that lasts.
UV-Resistant Sealants
We only use UV-stable silicone sealants for external windows. Unlike polyurethane, which can crack and degrade under sun exposure, our materials are designed to withstand Melbourne’s weather conditions long term.
Colour-Matched for a Seamless Look
We match the sealant to your window frame colour for a clean, integrated appearance. The result? Crisp lines on the brickwork, minimal visibility on the glass or frame, and an overall polished finish
Clean, Precise Application
Our skilled technicians apply sealant with a clean “off-the-gun” finish whenever possible. If extra care is needed, we take the time to mask and tape the surrounding area — ensuring smooth, professional lines every time.
