How to Use a Dental Dam for Safe Oral Sex

A dental dam is a thin, flexible sheet typically made from latex or polyurethane, designed to act as a physical barrier during oral-genital or oral-anal contact. This barrier prevents the direct exchange of bodily fluids. Using a dam significantly reduces the risk of transmitting sexually transmitted infections (STIs), such as syphilis, chlamydia, or gonorrhea, which can pass through contact with mucous membranes and open sores.

Obtaining and Preparing the Dam

Acquiring a dental dam may require looking beyond the typical checkout aisle; they are commonly found at sexual health clinics, specialized online retailers, or larger drugstores. When selecting a dam, two primary material options are available: latex and polyurethane. Latex dams are elastic and conform well to body contours, while polyurethane is a suitable, non-latex alternative for individuals with rubber sensitivities.

Before use, proper preparation is necessary to maintain the dam’s integrity and enhance the experience. Applying a lubricant is highly recommended, as friction generated during oral activity can cause the thin material to break down. Apply a water-based or silicone-based lubricant exclusively to the side of the dam that will contact the partner’s skin. Oil-based products, such as petroleum jelly or body lotions, must be strictly avoided because they rapidly degrade latex, causing tears or a complete rupture of the barrier.

Detailed Application Instructions

The application process begins with carefully opening the sealed package to avoid accidentally tearing the dam with fingernails or teeth. Once removed, the dam should be gently unfolded and inspected for any holes or imperfections. After verifying the dam is intact, place it directly over the entire area intended for oral contact, whether the vulva or the anus.

Lay the material flat, ensuring the entire area requiring protection is covered. Securing the dam is often achieved by holding the edges with one or both hands throughout the activity to prevent slippage. Some couples use a small amount of water-based lubricant between the dam and the skin to help it adhere slightly, but the primary goal is maintaining a stationary, flat surface. The barrier must not be stretched tightly, as this could weaken the material and increase the risk of tearing during use.

Maintain the barrier’s orientation and position during use. Once the dam has been used on one area of the body, it must never be flipped over to use the reverse side or moved to cover a different anatomical area. Doing so would immediately defeat the purpose of the barrier, as any pathogens collected on the used side would be transferred directly to the mouth or the new contact area. The physical separation must be consistently maintained throughout the entire period of oral contact.

Ensuring Continued Protection and Safe Disposal

Periodically monitor the dam during use to ensure it remains flat and that no tears or holes have developed from friction or vigorous activity. If the barrier slips significantly, tears, or is accidentally penetrated, stop the activity immediately, and apply a new, unused dam before continuing. A dental dam is a single-use item and must never be reused for subsequent encounters.

Upon completion, carefully remove the dam and immediately dispose of it in the trash, ideally by wrapping it in tissue or paper to avoid contact with the used surface. Never flush the dam down the toilet, as the materials are not biodegradable and can cause plumbing blockages. For situations where a commercially packaged dental dam is unavailable, a temporary barrier can be created from other latex products.

Creating a Temporary Barrier

If a commercial dam is unavailable, a temporary barrier can be created from other latex products. While commercial dams are the preferred and easiest option, these alternatives offer a functional substitute for barrier protection.

  • A non-lubricated latex condom can be repurposed by first cutting off the rolled ring at the base and the tip, then slicing the cylinder lengthwise to unroll it into a square sheet.
  • A non-powdered latex glove can be cut open and flattened to form a usable barrier.