TayMac RLB100 Threaded LB Conduit Body, Die Cast Aluminum, Stamped Steel Cover, 1-Inch, Gray

Why I reached for this LB conduit body

On tight runs where I need a clean 90-degree turn and a place to pull or splice conductors, I prefer a simple, dependable LB conduit body over improvising with fittings and long sweeps. The RLB100 has become one of those small, reliable pieces I don’t think about much—because it just works. I’ve used it on service runs into outbuildings, through block walls, and for transitions where flexibility was limited. It has consistently given me easy access for pulls and maintenance without fuss.

Build and materials

The housing is die-cast aluminum with a gray powder-coat finish. That combination matters: the casting feels solid without excess weight, and the coating holds up to handling, friction against masonry, and the occasional scrape from a fish tape or screwdriver. I’ve had it mounted outdoors where overspray and dust are part of the environment, and the finish has remained intact with only minor scuffing.

The cover is stamped metal, not cast. In practice, that means it’s lighter and a bit more flexible. Paired with the included NBR (nitrile) gasket, it sits flat and seals evenly when tightened correctly. I like that the gasket is included—no hunting for the right thickness or material on-site. NBR brings good oil and fuel resistance and handles typical ambient temperatures outdoors. The cover is held by a single combination-head screw; I appreciate being able to use either a flathead or Phillips in a pinch.

The internal threads on the body are clean and started easily on both rigid metal conduit and threaded PVC adapters in my installs. Aluminum threads can gall if you’re careless, so I still apply a bit of thread compound and make sure to start by hand. Once seated, the body feels secure and square.

Installation experience

Most of my use has been on 1-inch runs: threading through a concrete block wall for a service upgrade, and transitioning from flexible conduit into a structure and back to a main panel. The RLB100 gave me the right-angle access point I needed without resorting to a messy junction. Removing the cover opens a straight shot through the bend, so I could guide conductors with one hand while feeding with the other. That direct path makes a noticeable difference when you’re pulling larger conductors on a warm day.

On one pull, I ran four 6 AWG THHN conductors through a tight path. The cavity wasn’t cavernous, but it was workable: I used a nylon fish tape, applied a generous amount of pull lube, and made the bend in controlled stages. The removable cover meant I could keep the conductors aligned and avoid skinning insulation as they came through. Once seated, I did a quick interior check to make sure nothing was pinched before closing it up.

Threading the body onto conduit was uneventful—no cross-threading or uneven engagement. I used a non-hardening thread sealant rated for electrical fittings, and I recommend doing the same for outdoor installs. The body seats flush, and any minor misalignment is easy to correct before final tightening.

Weather resistance and sealing

“Watertight” claims can be optimistic if surfaces are dirty or hardware is overtightened. In my use, the RLB100 has been rain-tight when installed with the gasket clean and evenly compressed. The NBR gasket compresses uniformly under the stamped cover; the trick is to snug the combination screw firmly without cranking down so hard that the cover bows. I wipe the mating surfaces before closing and always check for grit that can compromise the seal.

I’ve had one unit in a position that sees splash and wind-driven rain. After a season, there was no evidence of moisture inside. I still crack covers periodically for inspection—any re-enterable fitting benefits from a fresh look and, when necessary, a new gasket if it’s taken a set after multiple open/close cycles. So far, the original gasket has held its shape.

Access, capacity, and ergonomics

As an LB, its mission is straightforward: provide a 90-degree change of direction with serviceable access. The interior volume felt appropriate for a 1-inch body; I could manage conductors with gloved fingers without fighting the walls. For really stiff or oversized conductors, a long-sweep elbow elsewhere in the run will always be kinder. But when the structure dictates a tight turn, I found the RLB100 perfectly workable. The straight-in access through the removable cover is the real value—it allowed me to manipulate the bend and reduce friction hotspots during pulls.

One small ergonomic note: the combination-head screw is a time-saver. The slot is deep enough that a flathead won’t cam out easily, and the Phillips profile engages well. I do wish the screw were captive to the cover—you can set it aside, but on a ladder, a captive design would cut the chance of dropping hardware.

Durability and corrosion resistance

Die-cast aluminum is a good call for outdoor conduit bodies. It won’t rust, and the powder-coat offers a protective layer that resists chalking and abrasion better than a basic paint. In coastal or highly corrosive environments, I still’d be mindful, but for typical residential and light commercial settings, I haven’t seen any corrosion bloom or pitting. The stamped cover is the one piece I treat with a bit more care. It’s not fragile, but if you torque the screw too aggressively or smack it during rough handling, you can introduce a slight bow. Keep the seal in mind and it’s not an issue.

Compatibility and use cases

I’ve used the RLB100 with threaded rigid metal conduit (RMC) and with threaded adapters on PVC. It’s an easy fit in service entrances, meter-to-panel runs, garage or barn feeds, and transitions from flexible to rigid where a clean penetration is desirable. Indoors, it offers the same convenience without the weather sealing being as critical. For hazardous locations or heavy industrial environments, I’d look to a different class of fitting; this one is aimed at general purpose work.

What I’d change or watch for

• Cover robustness: A cast cover option would add stiffness, though the stamped cover worked fine for me when installed correctly.
• Captive hardware: A captive combination screw would be a nice quality-of-life upgrade, especially for ladder work.
• Gasket longevity: NBR is a sensible choice; still, if you expect frequent re-entry, consider keeping a spare gasket on hand to maintain a consistent seal after multiple cycles.

None of these are deal-breakers, but they’re worth noting if you’re speccing parts for teams or repeated maintenance access.

Practical tips from my installs

• Start threads by hand and use a light thread compound on metal-to-metal connections to avoid galling.
• Clean mating surfaces before installing the gasket and cover; grit will compromise the seal.
• Snug the cover screw evenly—tight enough to compress the gasket, not so tight that the cover bows.
• Use adequate pull lube and break pulls into stages through the LB to avoid insulation abrasion.
• If you’re outdoors, place the body so the cover faces a direction that minimizes direct water exposure where practical.

Bottom line

The RLB100 is a straightforward, well-built LB conduit body that handles the fundamentals: solid die-cast aluminum body, a durable powder-coated finish, a serviceable stamped cover, and a reliable NBR gasket. Installation is predictable, the threads are clean, and the access makes tight pulls manageable. After using it in both indoor and outdoor scenarios, I’m comfortable recommending it for general residential and light commercial work where a 1-inch LB is needed.

Recommendation: I recommend the RLB100. It’s dependable, easy to install, and appropriately weather-resistant when assembled correctly. While I’d welcome a captive screw and a stiffer cover option, those are minor wishes rather than real drawbacks. For most everyday conduit runs that need a right-angle access point, this LB conduit body does its job with no surprises—and that’s exactly what I want from a fitting like this.