UV Absorbers and HALS

The material called UV Absorbers and HALS is a category of polymer light stabilisers designed to protect polymers against prolonged ultraviolet exposure. UV absorbers reduce the harmful effects of UV radiation, while hindered amine light stabilisers (HALS) help prevent long-term surface degradation. Used together, the two stabiliser types support colour stability and help reduce cracking, fading and loss of mechanical performance in outdoor applications.

What are UV Absorbers and HALS used for?

UV Absorbers and HALS are used to support the durability of polymer products exposed to sunlight over time. The relevant applications are outdoor products where colour retention, surface condition and mechanical performance matter during prolonged UV exposure. The stabilisers address different aspects of light-related degradation: UV absorbers reduce the harmful effects of ultraviolet radiation, and HALS help prevent long-term surface damage.

For a product exposed outdoors, the combination is relevant when fading, cracking or declining mechanical performance are concerns. Product designers and formulators should relate stabiliser selection to the polymer application and the performance issue they need to address. The known function is protection against prolonged UV exposure; a specific grade’s suitability for a formulation requires confirmation from its technical data.

How should I select or process UV Absorbers and HALS?

Selection starts with the polymer type, the outdoor exposure context and the degradation concern. A formulator should confirm whether the requirement calls for a UV absorber, a HALS, or a combination, then check the grade’s compatibility and recommended use for the polymer. These details are grade-specific and should be confirmed on the technical data sheet rather than assumed from the product-family name.

Processing decisions also require grade-specific information. Check the supplier’s technical guidance for recommended addition level, processing conditions and any formulation notes before a production trial; the available facts here do not specify those values. A technical data sheet is the right reference for confirming application and processing parameters, while a safety data sheet provides the relevant safety information for handling.

Formulators should weigh the need to address UV-related damage against the requirements of the finished polymer product. The performance goals include colour stability and reduced cracking, fading and mechanical-performance loss, but a selection should not assume identical results across polymers or formulations. Confirm the target grade and its use guidance before finalising a formulation or scaling up a trial.

What technical information should I request before buying?

A buyer should request grade identification, polymer compatibility, recommended use and processing guidance before comparing options. For UV absorbers, ask for the technical information describing their role in reducing the harmful effects of UV radiation; for HALS, confirm the information relevant to preventing long-term surface degradation. The technical data sheet should provide the applicable grade details.

Where the supplied grade or formulation information does not answer an application question, send the supplier the polymer type and the outdoor performance objective. That context allows the supplier to respond against the actual requirement rather than relying on a broad family description. A sample supports a practical evaluation, with the supplier’s documentation guiding the trial.

Revona Chemicals, an Istanbul-based B2B supplier, supplies UV Absorbers and HALS. Buyers can request a technical data sheet, safety data sheet, sample or quotation from Revona Chemicals by sharing their application and grade requirements; grade-specific values and guidance are confirmed through the supplied documentation.