Control arms hold front wheels, allowing up and down movement. of the front suspension. The control arm is an important part of the front suspension. It connects the steering knuckle (the part that holds the front wheel) to the vehicle's frame or body, see the photo.
Often, installers use grout in place of caulk for these reasons: 1  The caulk may not exactly match the grout color.  Even when the caulk exactly matches the grout color when installed, it may not match six months later (caulk will age differently from the grout).
Sanded grout is generally used for larger joints. Sanded grout types consist of a cement-based mortar that have small sand grains added to it to help it when setting. Adding the sand to the grout, provide a stronger grout that is normally used in joints larger than 1/8th inch.