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Sliquid Naturals Tsunami is an ultra-thick water-based lube, the thickest gel in Sliquid's range, and this 4.2 oz bottle is the size for regular use. It's thickened with plant cellulose and seaweed-derived carrageenan, contains no glycerin or parabens, and works with every toy material. It suits anal play, larger toys and anyone who finds thinner lubes disappear too soon.
Sliquid makes a whole range of water-based lubes, and Tsunami is the thickest of them. It comes out as a dense, cushioning gel that holds its shape on a fingertip and doesn't run off a toy. Once it's applied, it stays put, so you get a padded, slick glide that lasts longer than thin liquids before it needs topping up. People often reach for a thick water-based lube like this for anal play, larger toys and long sessions, when extra cushioning makes things more comfortable.
The thickness comes from plant cellulose, guar and carrageenan, a seaweed extract that gives the gel a silky, slightly slippery feel without stickiness. There's no glycerin or glycol, which some people find leave water-based lubes tacky as they dry; Tsunami fades more cleanly. The full ingredient list is short: purified water, plant cellulose, carrageenan, guar, sodium benzoate, potassium sorbate and citric acid. Sliquid also lists it as free of parabens, sulfates, DEA, PEG, sorbitol and gluten, and vegan-friendly. Sliquid gives its pH as 4.1 to 4.4.
Because it's water-based, Tsunami works with latex, rubber, plastic and silicone toys, and with latex condoms. That makes it one of the easiest lubes to keep by the bed: you don't have to check what material a toy is before using it. It's unflavoured, unscented and non-staining, so it suits people who prefer a neutral lube. As with any thick gel, a little goes a long way. Start with a small amount, spread it evenly, and add more only if you feel drag.
The anus doesn't make its own lubrication, so thickness matters more there than anywhere else. Apply Tsunami to the toy and to the body, work a little in with a finger first, and reapply before it starts to feel dry rather than after. The same goes for wide dildos and plugs: a cushioned layer of gel makes the stretch at the entrance more comfortable and lets you go slowly. For strokers, a small amount lasts much longer than a liquid lube would inside the sleeve.
Tsunami is water-based, so it will eventually absorb or wash away in the shower. For long water play, a silicone lube lasts longer, as long as you're not using it with silicone toys. If you like a light, barely-there feel, a thinner Sliquid formula will suit you better; Tsunami is deliberately heavy. Clean-up is simple either way: it rinses off skin, toys and sheets with warm water.
See the full Sliquid range and our water-based lubes, or read our guide to lube for sex toys.
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