---
title: "Which glue works on rubber?"
description: "Contact cement for large flexible areas and rubber-toughened cyanoacrylate for small ones — but silicone and EPDM need a primer or they will not bond at all. The ran"
url: https://atoneplace.net/which/glue-rubber/
site: "At One Place"
---

# Which glue works on rubber?

**Which glue works on rubber?: Contact cement for large flexible areas and rubber-toughened cyanoacrylate for small ones — but silicone and EPDM need a primer or they will not bond at all.**

Rubber is chosen for parts that move, so the adhesive has to move too: a rigid epoxy bond on a flexing rubber part cracks along the glue line within days, no matter how strong the epoxy is on paper. Beyond flexibility, the material matters enormously. Natural rubber, nitrile and neoprene bond readily once abraded and degreased. Silicone rubber and EPDM do not — silicone sits at roughly 20-24 mN/m surface energy, in the same territory as PTFE, so it rejects adhesives for the same reason polypropylene does, and EPDM is a saturated hydrocarbon with nothing chemically reactive on the surface. Both need a specific primer, and the primer must match the adhesive brand.

## The options, ranked

*Ranked best-first for the stated job. The third column is why the others exist.*

| Option | Good at | Bad at |
| --- | --- | --- |
| Polychloroprene contact cement | Stays flexible, covers large areas, and grabs on contact — the standard for sheet rubber, gaskets and shoe soles. | One shot only: once the two coated faces touch, they cannot be repositioned. |
| Rubber-toughened cyanoacrylate | Fast and far less brittle than ordinary superglue, which matters on a material that flexes. | Small joints only, and it will not bond silicone or EPDM without a primer. |
| Polyurethane adhesive | Tough, flexible and waterproof, and bonds rubber to metal, wood and concrete. | Slow, foams, and needs clamping. |
| Silicone adhesive with primer | The only practical way to bond cured silicone rubber, and the primer is doing the real work. | Primers are product-specific, and even primed the bond is modest. |

## Technique that changes the outcome

1. Abrade the bonding face with 120 grit — rubber often carries mould release from manufacture
2. Degrease with isopropanol, not white spirit, which leaves a residue
3. With contact cement, coat both faces, wait until touch-dry, then press hard: pressure, not clamping time, makes the bond
4. Roll or hammer the joint through a cloth to get intimate contact across the whole area

## What goes wrong

- Epoxy on anything that flexes
- Expecting any general adhesive to hold cured silicone rubber
- Bonding a rubber part that carries pressure or load, such as a hose under pressure

> Compiled practical guidance rather than a published standard. Product formulations vary by brand and market, so read the label — and where the work is structural, electrical or gas, the regulations that apply where you are govern rather than anything here.

## Other glue and adhesive questions

| For | Use |
| --- | --- |
| Plastic | It depends entirely on which plastic — identify it first, because solvent cement is unbeatable on some and useless on others. |
| Polypropylene and polyethylene | Ordinary adhesives cannot wet these plastics at all. Use a polyolefin primer with cyanoacrylate, an MMA structural adhesive, or weld the plastic. |
| Wood | PVA wood glue for anything indoors; a water-resistant grade (Type I / D4) or polyurethane for anything that gets wet. |
| Metal | Two-part epoxy for anything structural, cyanoacrylate for small dry parts, and MMA where the surface cannot be properly prepared. |
| Ceramic and pottery | Two-part epoxy for anything that will be handled or loaded, cyanoacrylate for a clean break on a display piece — and neither is dishwasher-proof. |
| Shoes | A flexible shoe repair adhesive — polyurethane or a neoprene contact cement — never superglue, which cracks within a day of walking. |
| Fabric | A washable fabric adhesive or a fusible bonding web — and never superglue, which reacts with cotton violently enough to burn. |
| Glass | UV-cure glass adhesive for an invisible joint, clear epoxy where it must hold load, and neutral-cure silicone where it must stay flexible or wet. |
| PVC pipe | PVC solvent cement with its matching primer — and PVC, CPVC and ABS cements are not interchangeable. |
| Tiles | A cement-based thin-set in almost every case; ready-mixed tub adhesive only on small dry walls, never on floors or in showers. |
| Phone screens | A pre-cut adhesive gasket, or a flexible B-7000-type adhesive around the frame — superglue destroys screens and is the classic mistake. |
| Outdoor and waterproof joints | Polyurethane or epoxy for rigid joints, MS polymer where the joint has to move — and check the water-resistance class rather than the word "waterproof". |
| Acrylic (Perspex, Plexiglas) | A solvent cement run into the joint by capillary action — not a tube adhesive, which will always look like a repair. |
| Concrete | Epoxy or a construction adhesive for bonding to it, and a chemical anchor resin — not glue — for anything that carries load. |
| Leather | Contact cement for a permanent flexible bond, or a leather-craft PVA to hold pieces while you stitch them. |
| Silicone | Effectively only more silicone, and even that needs a primer — and any silicone residue left on a surface stops everything else sticking too. |
| Paper | A glue stick or PVA for everyday work; wheat starch paste or methylcellulose for anything you want to survive — and never tape. |
| Foam | A foam-safe water-based adhesive or low-temperature hot melt — solvent adhesives dissolve polystyrene on contact. |
| Polycarbonate | A urethane or silicone adhesive is safest; solvent cements work but polycarbonate is unusually prone to stress cracking days later. |

## Common questions

### Which glue works on rubber?

Contact cement for large flexible areas and rubber-toughened cyanoacrylate for small ones — but silicone and EPDM need a primer or they will not bond at all.

### What should I avoid?

Epoxy on anything that flexes Expecting any general adhesive to hold cured silicone rubber Bonding a rubber part that carries pressure or load, such as a hose under pressure

## Related pages

- [Which glue works on plastic?](https://atoneplace.net/which/glue-plastic/)
- [Which glue works on polypropylene and polyethylene?](https://atoneplace.net/which/glue-polypropylene/)
- [Which glue works on wood?](https://atoneplace.net/which/glue-wood/)
- [Which glue works on metal?](https://atoneplace.net/which/glue-metal/)
- [Which glue works on ceramic?](https://atoneplace.net/which/glue-ceramic/)
- [Which glue works on shoes?](https://atoneplace.net/which/glue-shoes/)
- [Which glue works on fabric?](https://atoneplace.net/which/glue-fabric/)
- [Which glue works on glass?](https://atoneplace.net/which/glue-glass/)
- [Which glue works on PVC pipe?](https://atoneplace.net/which/glue-pvc-pipe/)
- [Which adhesive should I use for tiles?](https://atoneplace.net/which/glue-tile/)

## Sources

- Typical range compiled from manufacturer specifications — At One Place (/about/)