BEST FOR · For producing smooth concave mortar joints between bricks and concrete blocks. One-piece high carbon steel jointer has offset design for hand clearance. Two polished half-round working surfaces with different joint sizes on each end. Measures 10" overall.
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For producing smooth concave mortar joints between bricks and concrete blocks. One-piece high carbon steel jointer has offset design for hand clearance. Two polished half-round working surfaces with different joint sizes on each end. Measures 10" overall.
Official Hyde specifications
Measures
10" overall
Offset design for hand clearance
One-piece high-carbon steel
Two polished half round working surfaces with different joint sizes
PRODUCT FIT · IS THIS THE RIGHT TOOL?Straight answers. If it's the wrong tool for your job, we'll say so.
Choose this when: For producing smooth concave mortar joints between bricks and concrete blocks. One-piece high carbon steel jointer has offset design for hand clearance. Two polished half-round working surfaces with different joint sizes on each end. Measures 10" overall.
For producing smooth concave mortar joints between bricks and concrete blocks. One-piece high carbon steel jointer has offset design for hand clearance. Two polished half-round working surfaces with different joint sizes on each end. Measures 10" overall.
✕CHOOSE A DIFFERENT TOOL WHEN
Slab edges. The confusable pair, settled by material state: this half-round compresses mortar joints in a stiffening wall; the edger's quarter-round (18040) rounds the rim of a fresh concrete slab. If the material came off a mortar board, jointer; if it arrived in a ready-mix truck, edger. They hang near each other and share nothing else.
Raking and removal. A jointer compresses sound new mortar; cutting out failed mortar is the removal tools' trade (other lines), with the silica boundary attached there.
Grapevine, V, beaded, raked profiles. Two half-rounds make concave joints — the profile the BIA ranks best for weather, and the only profile this store will claim for this bar.
Filling. The jointer profiles mortar already in the joint; feeding mortar in is the pointing trowels' and grout bag's work. Repointing needs both tools, in order, and neither substitutes.
5/8" joints. Past this bar's ends; the wide-joint class (18182 , unresolved) exists for that world.
The offset grip rides above the bar; fingers wrap the offset, and pressure comes down through the barrel evenly. The offset exists so knuckles never scrape the wall — use the clearance, keep the wrist neutral. Let the runner steer. The upturned sled rides the channel it just made; steering hard with the wrist is how joints wander. Aim the leading end, weight the middle, and walk the wall. Keep the barrel polished. The mirror faces are the tool: mortar dried on the barrel prints drag lines into every joint after. Rinse before set, wipe dry, and the polish maintains itself; store it dry — one-piece high-carbon steel pits under damp alkaline residue like any good blade. Never strike below thumbprint. If paste lifts onto the tool, stop; you are sealing weakness in, not strength. Don't carve. If the barrel is cutting walls into the mortar instead of pressing a curve onto it, the joint is too far gone or the barrel is undersized for the joint — refill or resize, don't force.
Asked before buying
BUYER QUESTIONS, ANSWERED BEFORE YOU ORDER
Which end do I use?
Match the joint: 3/8" for standard modular brick, 1/2" for block and older wider work — barrel matched or a hair proud, so it bears on mortar and the arrises guide it.
When do I strike?
Thumbprint-hard: a clean print, no paste lifting. Tool in laying order, heads then beds, and let the weather set the pace.
Why concave and not flush or raked?
Compression plus geometry: the tooled concave densifies the surface and sheds water; flush and raked joints leave open texture and ledges — the BIA's ranking, cited above, not a style opinion.
Can it edge my new sidewalk?
No — that is the 18040's job on fresh concrete. Different material state, different curve, different trade; §4 settles the confusable pair.
One tool for brick and block?
That is this bar's argument: the trades' two standard widths on opposite ends of one piece of steel.
What about 5/8" joints?
Past this bar. The wide-joint jointer (18182) covers that class per its store title — a claim that page carries with its evidence gate stated .
Care?
Rinse before mortar sets, wipe dry, store dry. The polished barrels are the tool — protect them and it outlives its buyer.
Two polished half round working surfaces with different joint sizes
official product name
3/8" – 1/2" Heavy-Duty Steel Brick Jointer
official variant identity
18170
official description
For producing smooth concave mortar joints between bricks and concrete blocks. One-piece high carbon steel jointer has offset design for hand clearance. Two polished half-round working surfaces with different joint sizes on each end. Measures 10" overall.
