1-2-3Mortar is a polymer-enhanced sand and cement mortar preblended for easy and fast application. Contractors simply add water to the applicator bag, mix, and apply from the bag when laying block, brick, and stone—no extra tools required. The company says the product’s strength “allows for thinner joint application and higher yields.” One 11.3-pound bag is enough to lay 30 blocks. Pricing starts at $11 for a 5.5-pound bag. 123mortar.com