Using this foam backer rod is simple: just cut it to your desired length, insert it into the gap or crack, and press it down firmly. It acts as an excellent insulator, helping to block air, heat, and sound transmission through cracks.
eBay
0.04-0.88mm 32 Blades Feeler Gauge Metric Gap Filler Thickness Gage Measurment Tool 1-15mm Plug Feeler
Aliexpress UK
The Everbuild Deep Gap Filler is a high-quality, 1-litre container of grey gap filler, made in the United Kingdom by the trusted brand Everbuild. This product is designed to fill large gaps and imperfections in walls, providing a smooth and professional finish for your painting and DIY projects. Ideal for home improvements and maintenance, this gap filler will help you achieve a flawless and polished look in your living space.
eBay
6-40M Casement Window Seal Tape Soundproof Acustic Foam Tape for Weather Stripping Door Seal Gap Filler Noise Reductian Artifact
Aliexpress UK
WIDE-GAP ALL WEATHER JOINT-FILL is also compatible with most types of paving including natural stone, terracotta, clay, concrete and cobble stones. A pointing tool may be used to compact further and achieve a traditional finish.
eBay
1pc 3meters/118.11in Cladding Door and Window Seals wedge weather stripping seal strip Doors Gap Filler Noise Blocker Foam Tape
Aliexpress UK
WIDE-GAP ALL WEATHER JOINT-FILL is also compatible with most types of paving including natural stone, terracotta, clay, concrete and cobble stones. A pointing tool may be used to compact further and achieve a traditional finish.
eBay
0.02 To 1 mm 17 Blade Stainless Steel Thickness Gap Metric Filler Feeler Gauge Measure Tool for Feeler Gauge Valve Shim
Aliexpress UK
Suitable for filling deep holes up to 50mm, this filler will not shrink, sag or crack. Dries to a light grey finish, it can be painted over after 30 minutes with little or no need for sanding. Requiring just one application, there is no need for secondary filling. The filler is suitable for use on wood, plaster, masonry, cement, stone, brink and rendering.
eBay
6-40M Casement Window Seal Tape Soundproof Acustic Foam Tape for Weather Stripping Door Seal Gap Filler Noise Reductian Artifact
Aliexpress UK
17 Blades Feeler Gauge Metric Gap Filler 0.02-1.00mm Gage Measurment Tool For Engine Valve Adjustment
Aliexpress UK
17 Blades Feeler Gauge Metric Gap Filler 0.02-1.00mm Gage Measurment Tool for Engine Valve Adjustment
Aliexpress UK
Soft Plug-In Car Seat Gap Filler Elastic Polyurethane Seat Crevice Filling Strip Universal Seat Blocker Prevent Dropping For Key
Aliexpress UK