See our birth control comparison for how condoms stack up against other methods on effectiveness. This page is about actually using them correctly — since for condoms specifically, the gap between typical-use and perfect-use effectiveness is largely about technique, not luck.
External condoms
Worn on the penis, external condoms are the most widely used barrier method. Correct use matters more than people assume:
- Check the expiration date and packaging before opening — a damaged wrapper or expired condom is a real, avoidable failure point.
- Pinch the tip while rolling it on to leave space for fluid; skipping this is a common cause of breakage.
- Put it on before any genital contact, not partway through — pre-ejaculate can be present well before ejaculation, covered in our ejaculation guide.
- Use water-based or silicone lubricant only. Oil-based products (including many lotions, oils, and some massage products) degrade latex and can cause it to fail — see our lube 101 guide.
- Hold the base while withdrawing, right after ejaculation, to prevent slippage.
Internal condoms
Worn inside the vagina or anus rather than on the penis, internal condoms give the receptive partner direct control over protection and can be inserted ahead of time, which some people prefer. They have a somewhat higher typical-use failure rate than external condoms — see our comparison page for the numbers — partly because correct insertion takes more practice to get comfortable with initially. Key points:
- Insert before contact, not partway through, the same principle as external condoms.
- Make sure the outer ring stays outside the body and the inner ring is pushed up as far as it goes.
- Guide the penis inside the condom directly during penetration — if it slips to the side of the condom instead of inside it, that's not effective.
- Don't use an external and internal condom at the same time — the friction between the two materials increases breakage risk rather than adding protection.
Non-latex options
Polyurethane and polyisoprene condoms are effective alternatives for latex allergies or sensitivities, with generally comparable effectiveness to latex, though some non-latex materials show slightly higher breakage rates in studies. Lambskin (natural membrane) condoms are a separate category worth flagging specifically: they can prevent pregnancy but don't reliably block viruses, so they're not a good choice if STI prevention matters — see our STI prevention guide for more on barrier methods and STI risk specifically.
Frequently asked questions
What actually causes condoms to break?
Most breakage traces back to a handful of fixable causes: using oil-based lubricant or products with latex condoms (which degrades the material), not leaving space at the tip for fluid, using an expired condom, putting it on inside-out and flipping it, or simply not using enough lubricant, which increases friction and strain on the material.
Can internal and external condoms be used together?
No — using both at once during the same penetration increases friction between the two and makes breakage more likely, not less. Use one or the other, not both simultaneously.
Are non-latex condoms as effective?
Polyurethane and polyisoprene condoms are effective alternatives for people with latex allergies or sensitivities, with generally comparable effectiveness — though some non-latex materials are slightly more prone to breakage than latex in studies, and lambskin (natural membrane) condoms specifically don't block viruses the way synthetic materials do, so they're not a reliable choice for STI prevention even though they can prevent pregnancy.
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