HLA 21 is a low ammonia prevulcanised natural rubber latex without antioxidant and has high modulus property.

Available Documents

TDS Download

Technical Informations

Application Advice/Typical Applications

HLA 21 has been specially developed for the manufacture of catheters and other dipped medical products where higher purity latex with reduced proportion of non-rubber constituents is required. It is also suitable for dipping electrician glove. The vulcanisation systems used for HLA 21 comply with the generally applicable sections of FDA and BGA requirements.

Shipping and Storage

Ideally the product should be stored under shelter at temperatures ranging from 10ºC to 33ºC. This product is water-based hence it is necessary to protect from freezing. If the product is stored at temperatures outside the ideal range for an extended period of time, it should be thoroughly mixed and tested prior to use. Owing to the intrinsic characteristic of natural rubber latex, creaming will normally occurs during storage. It is advisable to mix well the latex compound before use. As the product is based on natural rubber latex, changes in its colloidal properties are expected during storage. Available in both bulk and drums.

Product Security/Health and Safety

Before handling, please read the Safety Data Sheet of this product for advice on safety, use and disposal.

Effluents and Pollution Control

Before handling, please read the Safety Data Sheet of this product for advice on safety, use and disposal.

For further information regarding this product please refer to:

Synthomer Limited Head Office
Phone: +44 (0)1279 436 211
FAX: +44 (0)1279 444 025


Character Value Unit
Total Solid Content 60.5
Ammonia Content 0.35
Mechanical Stability 1400 sec 
Ford Cup 3 Viscosity @ 25°C 40.0 sec 
Modulus at 700% elongation 14.0 MPa 
Tensile Strength 25.0 MPa 
Modulus at 700% 50  
Tensile Strength 75  

© 2014 Synthomer plc

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