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Rex Black Diamond Hot Wax Ketjuvaha

Availability
Immediately

Detailed availability

Location Store (Helsinki): Cycling, Zone 19, warehouse

Reviews

Overall rating

☆☆☆☆☆ (86 reviews)

Product description

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Hot waxing is an increasingly popular way to lubricate chains. The solid wax does not collect dirt and keeps the entire drivetrain clean, repelling dirt very well. Black Diamond Hot Wax chain wax combines Black Diamond's highly lubricating additive technology with Rex's over 70 years of experience in paraffins. Switching to hot waxing makes it much easier to keep your bike clean, and protects your chains and sprockets from wear. A hot waxed chain does not mess up or stain, and can be cleaned with just hot water.

To ensure high quality, Rex has put all the Black Diamond additives in one black block. The additive block is like a bottle of Black Diamond chain oil in solid form. Eleven white Rex paraffin blocks are a carefully selected wax blend, and when combined with the additive block, they ensure excellent lubrication. By melting all the blocks (11+1) together, you get a wax blend that works great in all conditions.

By melting the additive block with four light wax blocks (4+1), you get a mixture that provides extreme wear resistance for even the longest runs and races. The remaining 7 wax blocks can be used as a cleaning pre-treatment wax, keeping the 4+1 mixture clean and maintaining its performance for longer. Two-step wax treatment in one package!

Instructions for chain lubrication
1. Before first use, clean the chain thoroughly with a solvent cleaner such as Rex Chain Cleaner. A good cleaning will improve the adhesion of the wax and increase the duration of the lubrication. If the chain has previously been treated with hot wax, simply rinsing with hot water and wiping is sufficient.
2. Melt all the wax blocks over low heat (max. 100°C) e.g. in a saucepan, together with the chain to be treated. Let the chain warm up, and mix it with the wax so that the wax penetrates the chain completely. You can treat several chains at the same time.
3. Lift the chain to cool. The treatment has been successful if the chain is stiff. Flex the chain joints and install them. The chain will still flex after a few kilometers of riding.
4. Re-wax the chain when it is noisy. To keep the wax clean for longer, first rinse the chain with hot water, wipe and let it dry well. Then repeat the waxing process.

The approximate size of the packed product or the sales package is 170 x 140 x 70 mm.

Weight
0,48 kg
(with sales package 0,552 kg)

Country of origin

Finland

Comments

Ville B. verified buyer, 15.10.2025

Overall rating

☆☆☆☆☆

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This wax really works. I already bought a second set so I can wax more chains at once efficiently.

Anonymous verified buyer, 12.10.2025

Overall rating

☆☆☆☆☆

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Now over the summer I've had experiences using it on trails with a terrain filler. I won't be going back to chain oils. It stays on the chains well, easy to clean and do a top-up wax!

Stephen S. verified buyer, 6.10.2025

Overall rating

☆☆☆☆☆

Great price, fast delivery, no issues at all will buy again from Varuste. Hot waxed 4 chains and its used very little of the wax - so it will do a lot of chains, we did a 75km gravel ride in the mud yesterday and so far the wax is performing very well - quick wash down with a hose - no dirt or particles on the drive chain.

Henri L. verified buyer, 1.10.2025

Overall rating

☆☆☆☆☆

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Top product, there's no going back to normal chain oils after this.

Anonymous verified buyer, 25.9.2025

Overall rating

☆☆☆☆☆

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Easy chain care. Maintenance is just washing. I ride it for about 600 miles before the chain starts making noise.

Marno H. verified buyer, 18.9.2025

Overall rating

☆☆☆☆☆

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Rex Black Magik was a disappointment, so I decided to try this hot wax again. The lubrication ran out again at 100 km. Part of the distance was wet asphalt. With Magik, I had previously rusted the chains, and the same thing happened this time. Now I got completely new chains (Shimano CN-HG901) and they rusted again. The way things went was that I pedaled it 100 km with freshly waxed (hot waxed) chains. Part of the distance was wet asphalt. The chains were new, cleaned and dipped in wax, just as instructed. After the ride, I dried the chains, carefully. The bike was inside the apartment, +22. The next day I spun the chains inside, and they were squeaking and creaking. They couldn't have gone anywhere. So the lubrication ran out in one 100 km ride. I didn't want to take the chains off AGAIN and start heating the wax, so I added Black Magik wax to the chains. The next day the chains (new chains) were RUST again. No f*cking shit. This waxing is suitable for those who only ride in dry weather and/or have a team that changes the chains every ride.

Anonymous verified buyer, 6.9.2025

Overall rating

☆☆☆☆☆

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Top product, easy to care for chains and above all, the pant legs don't get tangled in oils.

Anonymous verified buyer, 28.8.2025

Overall rating

☆☆☆☆☆

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I bought it based on Zero Friction and am very satisfied.

Aleksi A. verified buyer, 23.8.2025

Overall rating

☆☆☆☆☆

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A really substantial set and a good product all around.

Jussi T. verified buyer, 8.8.2025

Overall rating

☆☆☆☆☆

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I have used this wax on three bikes this year. A very long-lasting package. The wax has lasted about 500km on gravel without any maintenance and about 3-400km off-road on an electric SUV. In practice, you don't need to do anything to the chains between waxes and they don't get dirty much, like with oil.

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