Welan Gum is a specialty biopolymer polysaccharide produced by microbial fermentation and used as a high-efficiency rheology modifier. It is especially valued for its excellent viscosity retention and suspending power under high temperature, high shear and high pH (alkaline) conditions in cementitious and brine systems.

Compared with conventional thickeners, Welan Gum maintains stable rheology in extreme environments, making it an ideal choice for self-compacting concrete (SCC), oil well cement slurries, drilling fluids, spacer fluids and other high-performance industrial fluids. Unionchem supplies high-purity, consistent Welan Gum from China to global customers in construction, oil & gas and industrial markets.

In some formulations, Welan Gum can be used together with or as an alternative to other rheology modifiers such as Xanthan Gum and Hydroxyethyl Cellulose (HEC) to fine-tune viscosity and suspension behavior.

Grade / Series	Key Features & Benefits	Primary Applications	Comparable in performance to:
UC-WG-SCC	Superior anti-segregation, enhanced flowability, low stickiness	Self-Compacting Concrete (SCC), shotcrete, cement-based grouts	Kelco-Crete®
UC-WG-DF	Exceptional high-temperature stability, suspends weighting agents, reduces fluid loss	Oil & gas drilling fluid viscosifier, spacer fluids, completion fluids	Biozan®, Geovis
UC-WG-RH	Rapidly hydrating, easily dispersible	Cement pre-mixes, dry-mix mortars, on-site rapid preparations	N/A
UC-WG-IS	Powerful suspension, excellent chemical stability	Herbicides suspension agent, paints, industrial cleaners	Kelco-Vis

 Superior anti-segregation and anti-bleeding
In self-compacting concrete (SCC) systems, Welan Gum helps “lock” coarse aggregates in place, reduce segregation and minimize bleeding while maintaining excellent flowability.