U-30MES-5 liquid polysulfide polymers-based sealant

U-30MES-5 liquid polysulfide polymers-based sealant

U-30MES-5 liquid polysulfide polymers (thiokol)-based sealant is a composition consisting of three components: base (sealing) paste, hardening (curing) paste, and a curing accelerator. After mixing the components, the sealant irreversibly transitions into a black rubber-like material (other color shades are not possible). U-30MES-5 sealant is capable of curing at a temperature not lower than 18 °С. Thiokol sealants feature good deformability, high oil and petrol resistance, good resistance to UV radiation, oxygen, moisture and air impermeability


U-30MES-5 liquid polysulfide polymers (thiokol)-based sealant is designed for surface and seam sealing of riveted, welded and bolted joints, aircraft structures, instruments and other items, for repair of aircraft equipment. It is recommended for use in the temperature range from -60°С to +130°С in air and type ТС-1 fuel environment


Specification 38.1051386-80



  1. good deformability;
  2. high oil and gasoline resistance;
  3. good UV and oxygen resistance;
  4. moisture and air impermeability.

Technical characteristics



Pot life, h, within the range of


Nominal tensile strength, MPa, minimum


Elongation at break, %, minimum


Bond strength when peeled from D-16 anodized alloy, kN/m, minimum


Brittleness temperature limit, °С, not higher than

— 36

Working temperature range in air environment, °С

— 60 to +130 (short-time at + 150)


Base paste – metal container,

Curing paste – plastic can,

Curing accelerator – plastic bag.

Guaranteed shelf life:

Base paste – 3 months,

Curing paste – 12 months,

Curing accelerator – 12 months.


The product is manufactured according to the Specification. The product meets the stated information within the shelf life and subject to storage conditions.