Sex Toy Lubricant Guide: Water, Silicone and Oil-Based Compared
Which lubricant works with which toy material, why silicone lube can ruin a silicone toy, and how to choose between water-based, silicone and oil-based lubes.
Some links in this article are affiliate links. If you buy through one we may earn a commission, at no extra cost to you. We only recommend what we would use ourselves, and a commission never decides what we rank first — how we test and what we will not do.
Lubricant is the cheapest upgrade available to almost any sexual experience, and the one people most often get wrong — usually by grabbing whatever’s nearest without checking whether it’s compatible with the toy or the condom they’re using.
There are only three categories and one significant compatibility rule. Here’s the whole picture.
The compatibility rule, first
Silicone lubricant can degrade silicone toys.
Silicone lube and silicone toys are chemically related, and prolonged contact can cause the toy’s surface to soften, become tacky, or break down. The damage is permanent.
This isn’t universal — formulations vary, and some high-quality silicone toys are more resistant than others. But it’s common enough that the practical rule is: use water-based lubricant with silicone toys, unless you’ve patch-tested silicone lube on an inconspicuous spot like the base and seen no reaction after a few hours.
Glass, stainless steel and ABS plastic have no such issue. Any lubricant works with them.
The three types
Water-based
The default, and the right answer most of the time.
- Compatible with every toy material
- Compatible with latex and non-latex condoms
- Washes off with water, doesn’t stain
- Widest availability and price range
Trade-off: it absorbs and evaporates, so it needs reapplication. A splash of water reactivates most water-based lubes rather than requiring more product — a genuinely useful trick.
What to check on the label:
Glycerin — a sugar alcohol used as a humectant. Some people find glycerin-containing lubes contribute to yeast overgrowth. If you’re prone to that, glycerin-free versions are widely available.
Osmolality — how concentrated the formula is relative to body tissue. Very high-osmolality lubricants can draw moisture out of cells and cause irritation with heavy use. The World Health Organization has published guidance recommending lubricants below roughly 1200 mOsm/kg. Most brands don’t publish this figure; those that do are usually the ones performing well on it.
Parabens — preservatives that some people prefer to avoid. The evidence on harm at these exposures is limited, but paraben-free options are common enough that avoiding them costs nothing.
Silicone-based
Longest lasting, best for water.
- Doesn’t absorb or evaporate — a single application lasts
- Works in showers and baths where water-based lube washes straight off
- Very slippery, and a little goes a long way
- Condom-safe
Trade-offs: the silicone toy issue above; it stains some fabrics; and it needs soap to wash off properly.
Best suited to glass, steel and ABS toys, or to use without toys at all.
Oil-based
The most limited category.
- Long-lasting
- Natural options like coconut oil are popular
Significant trade-offs: oil degrades latex condoms, causing failure. If latex condoms are involved for contraception or STI protection, oil-based lubricant is not an option. It also stains fabric permanently and can be harder to wash out of the body, which some people associate with irritation.
Coconut oil in particular gets recommended widely online with less caution than it deserves. It’s fine for external use without latex; it is not a general-purpose sexual lubricant.
Quick compatibility table
| Silicone toys | Glass / steel | ABS plastic | Latex condoms | |
|---|---|---|---|---|
| Water-based | ✅ | ✅ | ✅ | ✅ |
| Silicone-based | ⚠️ Patch test | ✅ | ✅ | ✅ |
| Oil-based | ✅ | ✅ | ✅ | ❌ Degrades latex |
Water-based is the only column with no caveats. If you own one lubricant, make it that.
Choosing by situation
First toy, silicone: water-based, glycerin-free, from a brand that publishes osmolality.
Shower or bath: silicone-based, with a glass or steel toy rather than silicone.
Anal play: thicker water-based formulations. The anus produces no natural lubrication, so more lube and more frequent reapplication is the baseline, not an optional extra. Relevant to anything in our anal toy guide.
Sensitive skin or recurrent irritation: water-based, glycerin-free, paraben-free, low osmolality, minimal ingredient list. Avoid anything with warming, cooling or tingling additives — those work by irritating tissue, which is the sensation being sold.
Latex condoms: water or silicone. Never oil.
Things worth avoiding
Warming and tingling lubes. The sensation comes from mild irritants like capsaicin or menthol. Some people enjoy it; if you’re at all sensitive, it’s a poor first choice.
Petroleum jelly. Degrades latex, difficult to clean out, and associated with bacterial vaginosis in some research.
Anything scented or flavoured for internal use. Fragrance and sugars are common irritants. Flavoured lubes are designed for oral use and are best kept to that.
Numbing lubricants marketed for anal use. Pain during penetration is information — it means slow down, use more lubricant, or stop. Numbing it removes the signal without removing the cause, which is how injuries happen.
How much to use
More than you think. The most common mistake is using too little and concluding that lube “doesn’t help much.”
Start with roughly a teaspoon for external use and more for anything internal. Reapply the moment things start feeling dry rather than pushing through. For water-based lube, a small amount of water often revives what’s already there.
Frequently asked questions
Can I use saliva? It works briefly and then doesn’t — it evaporates fast and provides very little slip. It’s a substitute for having nothing, not a lubricant.
Does lube expire? Yes. Check the date, and discard anything that’s separated, changed colour or smells different. Once opened, most last around a year.
Is silicone lube worth having alongside water-based? If you have glass or steel toys, or you want lube that works in water, yes. Otherwise water-based covers nearly everything.
Will lube affect fertility if we’re trying to conceive? Many standard lubricants impair sperm motility. Fertility-friendly formulations exist and are specifically labelled — worth seeking out if that applies.
The short version
Buy a good water-based, glycerin-free lubricant and it will work with every toy and every condom you own. Add silicone-based only if you want it for water or you’re using glass and steel. Keep oil away from latex entirely. Use more than you think you need.
