oil and gas drilling rig

Pexoseal 531

Bio-based copolymer latex for fresh or salt water-based drilling fluids

Chemistry Type: Styrene butadiene copolymer (SB)

Function(s): Drilling Fluid Additives, Fluid Loss Control Additives

Pexoseal 531 bio-based, co-polymer latex provides fluid loss control and wellbore stability for high performance water-based drilling fluids in fresh or salt water with temperature ranges up to 232 °C (450°F). It plugs pores to reduce filtercake permeability and offers a high tolerance to salts and multivalent ions.

Key Advantages

  • Organic colloidal micro-particles, deformable and compressible, to reduce non-productive time, improving wellbore stability
  • High tolerance to salts and multivalent ions
  • Plugs pores to reduce permeability of filtercake
  • Can impart fluid loss control and acts as a sealing additive for wellbore stability
  • Over time, the emulsion can form a film in the filtercake at high temperatures, strengthening the wellbore
Off White
Physical Form
-2 ºC
Specific Gravity
Solids (by weight)
40 - 42 %
Active Ingredient (by weight)
39 - 42 %
5.0 - 8.0
Mechanical Stability

Product Availability

Asia (excl. China, incl. India), China, EMEA (Europe, Middle East, Africa), Latin America, North America, South Pacific

Contact Us for individual country availability.

Related Documents & Downloads

OMNOVA Chemical Technical Data Sheet
OMNOVA Chemical Regulatory Data Sheet
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