Which item is typically used to clean out the cavity before injection sealing a gap?

Using a pipe cleaner to clean out a cavity before injection sealing is effective due to its design and functionality. Pipe cleaners are slender and flexible, allowing them to reach into tight spaces and remove debris, dust, or any remnants of older sealants. Their bristled texture helps scrub away unwanted particles without damaging the surfaces, making them particularly useful in ensuring a clean and optimal environment for the application of sealant. This is crucial as any contaminants can compromise the adhesion and performance of the sealant, potentially leading to leaks or failures.

While other cleaning items like cloths, brushes, and sponges can be useful, they may not possess the specificity required for detailed cleaning in tight cavities. For example, cloths might not reach into narrow spaces effectively, brushes may not have the right stiffness or flexibility, and sponges can be too bulky to maneuver effectively in confined areas. Therefore, the pipe cleaner is the best choice for ensuring a thorough clean in preparations for sealing.