Rex Wax

Black Diamond Hot Melt Chain Wax - 480g

REX Black Diamond Hot Wax is a high-performance hot-melt chain lubricant combining REX's decades of wax development experience with its Black Diamond friction-modifying additive technology. The paraffin-based formula is designed to minimize drivetrain friction, repel dirt and reduce wear on chains and other drivetrain components.

The 480g package includes eleven 40g blocks of specially formulated paraffin base wax and one 40g Black Diamond additive block. This two-stage system allows riders to customize the wax mixture for different riding conditions and performance requirements.

The standard 11:1 mixture provides a versatile blend for general riding, while a more concentrated 4:1 mixture is available for riders prioritizing maximum durability and performance in dry conditions. The unused base wax from the 4:1 mixture can be used as a cleaning and preparation wax before applying the concentrated blend.

Hot waxing requires removing the chain from the bicycle and immersing it in melted wax. Once cooled, the wax provides a clean, dry lubricating coating that doesn't attract dirt like conventional wet chain lubricants.

Key Features

• High-performance paraffin-based hot-melt chain lubricant
• Incorporates REX Black Diamond friction-modifying additive technology
• Designed to minimize drivetrain friction and reduce component wear
• Excellent dirt and dust repellency keeps the drivetrain cleaner
• Includes eleven 40g base wax blocks and one 40g Black Diamond additive block
• Two mixing options for different riding conditions
• Standard 11:1 mixture for versatile, all-condition performance
• Concentrated 4:1 mixture for extended durability and dry-condition performance
• Wax can be reheated and reused for subsequent chain treatments
• Hot-waxed chains can be cleaned using hot water without aggressive solvents
• Manufactured in Finland

Who It's For
Road, gravel and mountain bike riders looking to maximize drivetrain efficiency, reduce chain wear and keep their drivetrain cleaner. Particularly appealing to performance-focused riders, racers and anyone willing to adopt a hot-wax maintenance routine for the benefits of a cleaner, lower-friction drivetrain.

Important: The chain must be thoroughly cleaned and degreased before its first hot-wax treatment. Melt the wax at low heat and follow REX's temperature and application instructions.

Wax Mixing Options

The modifier block can be combined with different quantities of white base wax depending on the desired performance characteristics. Additional modifier blocks are available for purchase separately. 

Mixing Ratio	Intended Application
4 base blocks + 1 modifier	High-performance blend optimized for dry conditions and racing.
11 base blocks + 1 modifier	More versatile blend for wet and mixed riding conditions.
11 base blocks + 2 modifier blocks	Higher additive concentration for extended durability.