Which method of sealing material placement prevents bridging during installation?

Gravity feeding at a controlled rate is the method that effectively prevents bridging during the installation of sealing materials. This technique allows the sealing material to flow slowly and evenly into the space that needs to be filled, ensuring that it settles properly without forming clumps or obstructions that could lead to bridging.

Bridging occurs when the material fails to flow into certain areas, creating gaps that can compromise the seal. By using gravity to feed the material in a controlled manner, workers can ensure that it fills all voids and maintains an even distribution. This approach is particularly critical in applications where uniform sealing is necessary to prevent leakage or contamination.

In contrast, methods such as pumping at high speed may introduce turbulence that can disrupt material placement, while a quick-dry mixture may not allow sufficient time for the material to fill all spaces adequately. Applying a thick layer of sealing material can also lead to uneven distribution and potentially cause bridging as it may not settle evenly. Thus, controlled gravity feeding is the most effective method for achieving optimal sealing without the risk of bridging.