Brick’s porous surface needs a glue specifically labeled for masonry; the right choice depends on whether you’re doing structural work, attaching decor, or making a repair.
For the full breakdown, see our best Adhesive For Brick guide.
A brick wall looks solid, but its rough, porous face is actually a challenge for most adhesives. Stick on the wrong glue and the joint will fail — often within days. The fix is picking a product designed for masonry from the start. If you’re comparing specific glue brands for your project, our roundup of the best adhesive for brick covers the top performers.
The Three Adhesive Families That Work on Brick
Only three types of adhesive are reliable on brick, and each fits a different job. Mortar and masonry cement are the standard for structural brick-to-brick work — they are what holds a wall together. For decorative or attachment projects (mounting a planter, adding a shelf, or securing trim), polyurethane construction adhesive is the go-to; it grabs well, flexes a little, and works indoors or out. Epoxy is the strongest and most rigid option, ideal for bonding brick to stone, wood, or metal where you need water and heat resistance.
A fourth category — landscape adhesive or landscape block adhesive — is a specialized variant of construction adhesive formulated for outdoor masonry in garden beds and retaining walls. Heavy-duty outdoor mounting tape is acceptable only for lightweight or temporary items; it is not a structural solution.
How to Bond Brick: The Steps That Work
Getting a strong bond on brick is about surface prep and application technique. Start by cleaning the brick face — remove dust, dirt, and loose debris. A wire brush and a shop vacuum work well. For construction adhesives, cut the nozzle to the bead size you need, load the tube into a caulking gun, and apply the adhesive in a zigzag pattern across the brick’s contact surface. Press the parts together firmly and allow about 20 minutes of adjustment time before the adhesive sets. For masonry adhesive used with thin brick sheets, apply the adhesive or modified thin-set with a 3/8″ x 1/4″ notch trowel, press the sheets firmly in place, and grout with Type-S mortar mix or sanded tile grout.
Common Mistakes That Ruin a Brick Bond
Most failed brick glue jobs come from one of four errors. Using a general-purpose glue instead of a masonry-rated product is the most common — the adhesive simply can’t grip brick’s pores. Ignoring the brick’s porosity is the second: a smooth-surface glue will peel off a rough face within weeks. Skipping the cleaning step means dust creates a weak layer between glue and brick. And using adhesive for load-bearing brick repair — where mortar or professional masonry is required — can create a safety hazard. Always confirm that the product is labeled for exterior, weather-resistant, or waterproof use if the project lives outside.
| Adhesive Type | Best For | Limitations |
|---|---|---|
| Mortar / masonry cement | Structural brickwork (walls, pillars) | Not a glue for attaching objects; sets permanently |
| Polyurethane construction adhesive | Attaching decor, planters, trim (indoor & outdoor) | Not for load-bearing repairs |
| Epoxy | Bonding brick to stone, wood, or metal | Rigid; does not flex with thermal movement |
| Landscape block adhesive | Garden edging, retaining walls, outdoor projects | Overkill for small indoor attachments |
| Heavy-duty outdoor mounting tape | Lightweight or temporary items (hooks, small signs) | Fails with weight, moisture, or long-term sun exposure |
The table above lays out which adhesive fits which task. For nearly all decorative brick projects, polyurethane construction adhesive is the workhorse choice — it grabs well, you can adjust the placement for about 20 minutes, and it holds up outdoors. Epoxy is the pick when the joint needs to be rigid and waterproof.
FAQs
Can I use hot glue on brick?
Hot glue can work for temporary brick applications — holding a decoration in place for a short time — but it fails with moisture, direct sunlight, and heat. It is not a permanent or load-bearing solution on masonry.
Will construction adhesive hold brick to concrete for a repair?
Yes, polyurethane construction adhesive can bond brick to concrete for non-structural repairs or edge work. For a repair that handles weight or pressure, cement-based mortar is the only reliable choice.
Is epoxy safe to use on a brick fireplace?
Epoxy is not generally recommended for fireplace-adjacent or high-heat use because its temperature limit is lower than mortar’s. Always check the product’s temperature rating before using any adhesive near a firebox.
References & Sources
- Adiseal. “Glue for Brick: Best Adhesive for Brick and Stone Bonds.” Covers adhesive families and application steps.
- Old Mill Building Products. “Brick Bond 3.5 Gal Adhesive.” Details masonry adhesive for thin brick installation.
- Hunker. “What Adheres to Brick?” Explains adhesive types and common application mistakes.