Benchmarking Global Standards: Silibase STPE-A07T Emerges as High-Performance Domestic Alternative

Product Name: Silane Terminated Polyether Polymer

Item No.: SilibaseSTPE-A07T

SILIBASE SILICONE's STPE-A07T silane-modified polymer stands as a high-performance domestic counterpart to KANEKA MS POLYMER™ S303H, demonstrating excellent suitability for sealing applications in construction and transportation. SilibaseSTPE-A07T is alkoxy silane terminated polyether polymer. It could be applied in moisture curing elastic sealant, elastic structure sealant and sealing coatings. Sealants based on SilibaseSTPE-A07T not only have excellent adhesion properties, but also have adhesion to broad range of substrates. Different from polyurethane and silicone system, this formulation have no solvent and isocyanate, as well as no bubbles and odour generated from curing. It is especially suitable for construction industry, transportation industry and general industry application.

Beyond its competitive cost, this China-made polymer matches international benchmarks in key performance areas. It offers excellent elastic recovery, superior aging resistance, and fast-curing properties, with a moderate modulus ideal for diverse sealing scenarios.

Moderate Activity , Moderate Modulus

Good adhesion strength

Fast curing , non-tin catalysts used if needed, more eco-friendly

Excellent aging and yellowing resistance

Excellent water resistance , resistance to chemical corrosion

Excellent elastic recovery rate

Excellent storage stability

Solvent free , odourless , eco-friendly

Could be blended with other Risun polymers

Choosing the STPE-A07T enables industries to achieve performance on par with leading global brands while gaining significant advantages in supply chain efficiency and cost optimization.

Item Parameter

Polymer Type Silane terminated polyether

Appearance yellow liquid

Boiling Point ＞250℃

Gravity About 1.0 g/cm3

Viscosity 10000-15000 mPa·s (25℃)

Flash Point ≥237℃

Water-Soluble Virtually Insoluble

Shelf Life 12 months （25℃/50% RH）

Stable production from SILIBASE SILICONE ensures reliable supply, making this polymer the strategic choice for replacing imported materials and enhancing competitiveness across multiple sectors.

SilibaseSTPE-A07T polymer is used as base polymer in elastic sealants, elastic structure sealants, encapsulate adhesives and coatings . The curing mode of the polymer is moisture curing, It can be made into a single component or two-components system.

◼ Low modulus construction sealant

◼ Transportation industry elastic sealant

◼ Personal DIY sealant

◼ Eco-friendly decoration sealant

SilibaseSTPE-A07T polymer can be quickly dissolved in ordinary organic solvents (such as ethanol), but almost insoluble in water. So the raw materials in the formula system are mostly oil-soluble substances. SilibaseSTPE-A07T polymer curing mechanism, silane of both ends with the help of the catalyst react with water forming hydrolysis to generate Silanol, Silanol is crosslinked with catalyst to form a siloxane bond, resulting in a network-like structure. Water is a very important factor during the storage and processing.In order to stabilize the processing and storage, it must add a certain amount of chemical water removal agent,

we recommend the use of vinyl trimethoxysilane.

Conventional mixing process can be suitable for SilibaseSTPE-A07T POLYMER. For more technical support, please consult our technical engineers.

This product can be removed before curing by the general solvent, such as ethanol, dimethyl carbonate. After curing can only be removed by mechanical means.

Please refer to the Safety Data Sheet (SDS)

Because this product is moisture sensitive, If unopened and stored at 4℃-30℃ dry environment, the shelf life is 12 months. Use it as soon as possible if opened, the remain products should be resealed and stored at 4℃-30℃ dry environment. But if shelf life expired, you can still use it only after your positive confirmation of production performance.

◼ 50kg plastic drum lined with aluminum foil bag

◼ 200kg drum lined with aluminum foil bag

◼ 1000kg IBC