An adapter is configured to be mounted onto or otherwise coupled to a hot-melt adhesive dispenser. The adapter may include a body defining at least a first inlet channel, a second inlet channel, and a feed channel. The first inlet channel is configured to receive a first adhesive. The second inlet channel is configured to receive a second adhesive. The feed channel is configured to direct at least one of the first adhesive or the second adhesive to the hot-melt adhesive dispenser.