Creator finishes garage cinder blocks in gym project

A YouTube creator released episode 31 of the "Garage to Gym Transformation" series on May 22, detailing techniques to finish raw cinder block walls in a home garage conversion project. The 18-minute video demonstrates surface prep, moisture barriers, and aesthetic coatings to create a durable gym backdrop from concrete block walls. It has garnered over 5,000 views as of May 23. The series creator, who runs the channel with 12,000 subscribers focused on DIY home fitness builds, describes the garage's original cinder blocks as "ugly" and prone to dust shedding. In this installment, they apply a three-step process: pressure washing for cleaning, a concrete bonding agent for adhesion, and an elastomeric paint finish for waterproofing and visual appeal. "These blocks were shedding like crazy—now they're sealed and look pro," the creator says at the 4:32 mark. Why target cinder blocks specifically? Garage walls are often unfinished concrete masonry units (CMUs), which absorb moisture, flake mortar dust, and create uneven surfaces unsuitable for gym use near weights or cardio equipment. The video shows how untreated blocks lead to floor contamination and wall damage from sweat or spills—common issues in home gym conversions, according to fitness DIY forums like Reddit's r/homegym, where users report similar problems in 40% of garage build threads. The process starts with surface prep. On May 22 footage, the creator uses a 3,000 PSI pressure washer with a 25-degree nozzle to remove efflorescence and loose particles, followed by a shop vac for drying. They emphasize letting walls dry 48 hours in humid conditions to avoid trapping moisture, a step backed by concrete experts at Sherwin-Williams, who note incomplete drying causes 70% of coating failures on masonry. Next comes moisture control. A key product demo features Zinsser Bulls Eye 1-2-3 Water-Block primer, rolled on at 400 sq ft per gallon coverage. This acrylic sealer penetrates pores up to 1/4-inch deep, preventing water wicking that can lead to mold in gyms with high humidity from workouts. The creator tests adhesion by scratching the dried coat—it holds firm. Home Depot product specs confirm it blocks up to 34 lbs of hydrostatic pressure per square inch, ideal for below-grade garage walls. Aesthetic finishing seals the transformation. Two coats of Behr Premium Elastomeric Masonry Paint in a matte gray provide flexibility for hairline cracks up to 1/16-inch and a 10-year fade warranty. Applied with a 3/8-inch nap roller, it yields a smooth, gym-ready surface that wipes clean. Cost breakdown: $45 for primer, $60 for paint (covers 400 sq ft), plus $20 in tools—under $125 total for a standard two-car garage wall. "This isn't just pretty—it's functional for heavy use," the creator notes at 12:15 (; ). This fits a surge in garage gym projects. YouTube searches for "garage gym build" spiked 25% year-over-year in 2026, per Google Trends, driven by post-pandemic home fitness trends and Memorial Day sales on tools/mats. Similar series like Athlean-X's garage setups or Garage Gym Reviews tutorials emphasize walls as the "make-or-break" phase after racks and flooring. Tools used are accessible: Wagner Flexio 3500 sprayer for primer edges (rentable at $30/day), Purdy Colossus roller for coverage, and 80-grit sandpaper for smoothing high spots. Safety tips include N95 masks during sanding and ventilation fans to manage VOCs—standard per OSHA guidelines for masonry work indoors. Viewers in comments praise the budget focus, with one writing, "Finally, a fix for my dusty blocks—subbed!" Episode 31 links to prior installments (e.g., ep. 30 on rubber flooring) in the channel playlist. The next episode, teased at video end, covers lighting and mirror installs, expected in early June. Full materials list is pinned in the description.