Key Takeaways
Use paintable joint sealants for a flawless finish on interior walls, ceilings, trims, and cornices.
Acrylic gap fillers provide easy application and excellent compatibility with water-based paints.
Our Australian range includes Pro Gaps Fill & Paint, Pro Gaps Quick Dry, and Light Speed Filler for fast drying and minimal shrinkage.
Use hybrid polymers like SMX35 Seal & Stretch and SMX50 Seal & Stick for interior expansion joints that require extreme movement accommodation.
Sealing Joints in Interior Applications
The appearance of your joints dictates the success of your interior paint finish. Minor gaps, cracks, or dents in plasterboard, cornices, or skirting boards ruin the final look. You need a reliable acrylic sealant to prepare these surfaces correctly. These water-based products provide easy application and excellent paint adhesion.
Pro Gaps Fill & Paint is the perfect multipurpose filler for general crack and gap repair. It levels joints easily and creates a smooth surface. When you need to move quickly on site, Pro Gaps Quick Dry allows rapid application. You can paint over it with flat ceiling paints in just 10 minutes. For a fine finish that you can sand perfectly flush, Light Speed Filler offers brilliant smoothness for detailed decorative work.
Standard acrylics cannot always handle high-stress areas or large structural gaps. For these dynamic interior joints, use an SMX hybrid polymer. SMX35 Seal & Stretch combines paintability with massive elasticity for joints that experience constant movement. If you need a stronger adhesive grip alongside your seal, SMX50 Seal & Stick provides a tough and permanent bond. These products ensure long-lasting adhesion and prevent cracks in your paint layer.
Ready to start your project? Use our Store Locator to find your nearest Soudal stockist and grab the right interior sealing tools today.
FAQs
How do I seal the gap between my skirting board and a wavy wall?
Apply a continuous bead of Pro Gaps Fill & Paint along the top edge of the skirting. Run a damp tooling spatula over the bead to push the product into the irregular gap. This creates a smooth transition for your paint line.
What is the best sealant for interior window frames?
Wooden frames expand and contract heavily with temperature changes. Use a highly elastic hybrid polymer like SMX35 Seal & Stretch. It absorbs this movement effortlessly and accepts water-based paints without cracking.
Can I use acrylic gap filler for large structural cracks?
No. Standard acrylics are designed for small cosmetic gaps up to 5mm wide. You must use a heavy-duty flexible sealant like SMX50 Seal & Stick for larger structural cracks or expansion joints.
Why does my paint crack over the corner joints?
Paint cracks when the joint shifts more than the filler can stretch. This usually happens in new builds as the house settles. Upgrade from a rigid filler to a highly flexible acrylic or hybrid sealant to solve the problem.