I have used numerous Magic-Boss products over the years but when I purchased my newest trailer, with four slide-outs, I knew I would need a reliable produce to ensure the slides never stick. The Magic-Boss Slide-Out Lubricant & Protector was that produce. Being in the Navy for 33 years I have seen the damage poor maintenance can do and the cost of repair. Salt, grime and corrosion will seize the gearing of a slide-out in no time. The camping season is short enough in Canada without wasting time with the trailer in the shop for expensive maintenance. I lube the slide gearing at least three times a season. Slide-Out Lubricant & Protector sprays evenly and spreads to all nooks and crevasses.