The short answer: same condom, different rules
For anal sex, the condom itself does not change: you use a standard condom, the same kind you would use for any other sex act. Condoms are thin, stretchy pouches worn on the penis during sex (Planned Parenthood). What changes is everything around the condom: you need more lubricant, you reapply lubricant rather than reuse a condom, and you never move a condom from one act to another. Those three rules are the practical core of this page.
A standard condom is the right starting point because condoms are designed to cover the penis and collect semen during sex (Planned Parenthood). The material choice is a separate decision: external condoms are typically made from latex and, less commonly, from polyurethane, polyisoprene, or lamb intestine (Wikipedia). If you have a latex allergy, you should use condoms made from a material other than latex, such as polyurethane (Wikipedia). That material switch is about comfort and safety for the wearer, not about anal sex specifically.
Lubricant: more, and a thicker base
For anal sex, use more lubricant than you would for vaginal or oral sex, and apply it generously to the condom and to the area you are entering. Lubricant reduces friction, and friction is what makes condoms more likely to break. The exact amount is a judgment call. The rule is to err on the side of more rather than less, and to reapply before the condom feels dry.
A thicker base of lubricant matters because the condom needs to stay slippery throughout the act. If you are using a latex condom, choose a lubricant that is compatible with latex; oil-based lubricants can weaken latex condoms. The evidence here supports the general principle that condoms are thin pouches worn during sex (Planned Parenthood), and that latex is the most common material (Wikipedia). The practical takeaway is to use more lubricant and to keep it coming, rather than treating lubricant as a one-time application.
Reapplication: reapply lubricant, do not reuse the condom
When the condom starts to feel dry or the friction increases, reapply lubricant rather than trying to reuse the same condom for another act. Reapplication means adding more lubricant to the outside of the condom and to the receiving area. It does not mean putting the same condom back on after taking it off, and it does not mean using the same condom for a second round.
Condoms are single-use items. The Brook advisory page lists “Single use” as a key feature of condoms (Brook). That single-use rule is the reason reapplication is about lubricant, not about the condom itself. Once a condom has been used, it should be removed and discarded, and a new condom should be used for any further act. Reapplying lubricant to a condom that is still on and still in use is fine. Reusing a condom that has been off or has already been used for one act is not.
One-use rule: never move a condom between acts
The one-use rule means exactly that: a condom is used once and then thrown away. You should never move a condom from one act to another, whether that means from anal to vaginal, from one partner to another, or from one sex act to a different one. The Brook page’s “Single use” label (Brook) is the direct support for this: a condom is designed for one use, and moving it between acts is a reuse.
In practice, this means that if you switch from anal sex to another act, you put on a new condom. If you take a break and then resume, you put on a new condom. The condom that was used for the first act is finished. This rule is not about the condom wearing out visibly; it is about the condom being a single-use barrier. The same principle applies regardless of the condom material, whether latex, polyurethane, polyisoprene, or lamb intestine (Wikipedia).
Breakage risk: anal sex raises it
Anal sex raises the risk of condom breakage compared with vaginal sex, because the anal canal does not self-lubricate and the friction is higher. That is why the lubricant rule and the reapplication rule matter so much: more lubricant and a thicker base reduce friction, and reapplying lubricant keeps friction low throughout the act. The condom itself is still a standard condom (Planned Parenthood), but the conditions of use are different.
Safety note: Anal sex increases the chance a condom will break, so use more lubricant, reapply it before dryness, and never reuse a condom. If a condom breaks, stop and replace it with a new one before continuing.
The breakage risk is also why the one-use rule is not negotiable. A condom that has already been used for one act has been subjected to friction and stretching, and moving it to another act increases the chance of failure. The Brook page’s “Single use” label (Brook) is the evidence that condoms are intended for one use only.
Testing implication: exposure risk is higher
Because anal sex raises the risk of condom breakage, it also raises the risk of exposure to sexually transmitted infections (STIs) if a condom fails. STIs are viruses, bacteria, fungi, or parasites that people can get through sexual contact (CDC). Many STIs have no symptoms or may only cause mild symptoms, so people can have an infection but not know it (CDC). That means testing is the only way to know your status after a potential exposure.
If a condom breaks during anal sex, or if you are unsure whether it stayed intact, the testing implication is that your exposure risk is higher than it would be for protected vaginal sex. You should get tested for STIs according to your healthcare provider’s guidance. Condoms provide great protection from both pregnancy and STDs (Planned Parenthood), but that protection depends on the condom being used correctly and not breaking. When breakage happens, testing is the responsible next step.
Putting the rules together
The condom is unchanged: use a standard condom, and choose a material that works for you, such as latex or polyurethane if you have a latex allergy (Wikipedia). The lubricant rule is to use more lubricant and a thicker base, and to reapply before dryness. The reapplication rule is to add lubricant, not to reuse the condom. The one-use rule is to never move a condom between acts; discard it and use a new one. The breakage risk is higher with anal sex, and the testing implication is that a broken or questionable condom means you should get tested.
If you follow those three rules, you have done the practical things that reduce the chance of condom failure during anal sex. The rest is about checking in with your body, your partner, and your healthcare provider if something does not feel right or if a condom breaks.