KASTAR 731 Middle Quality Acetoxy Silicone Sealant

Middle quality, Acetic cure, Anti-mildew

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Kastar 731 is one component, acid solidification silicone sealant. It is super sealant in architectural applications with high performance and good adhesion.


We are professional manufacturer
of adhesives and sealants


* Non-toxicity, moisture-cured
* Acetoxy curing, fast solid
* Good adhesion and high intensity
* Water, weather and age resitance


* Sealing and bonding of al-alloy door & window.
* General bonding, sealing, glazing and assembling.
* Excellent adhesion for glass and most building materials.
* Filling joint of indoor decoration engineering.


* Clean the base material with cloth: clean it with solvent; if in particular demand, coat the surface with paint base and let it dry completely.
* Make sure to fill the interface with it and tightly stick it to the base material.
* Deal with adhesion test before use and make sure of good compatibility and viscosity of products and base material.

Emergent Treatment

Keep out of reach of children. Once it contacts the skin or eye by accident, rinse the affected part with water for 15 minutes or turn to the doctor for help immediately.


Keep in a dry place; don’t unseal it before use; keep a storage temperature below 25℃ to prolong its service life; 12 moths guarantee.

Packing Specification

245ml / 280ml / 300ml / 310ml(net capacity) hard package (the actual weight is subject to final products); 30ml, 60ml, 90ml, 100ml with blister card; 190kgs by drum;

Capacity movement±30%
Skin formation5-15 minutes
Drying time(2mm/h)8-10
Max. Tensile strength1.3
Hardness shore21±2
Elongation at Break(%)≥500
Modulus Mpa(100%)0.60
Application temperature-20℃ to +40℃
Temperature resistance-50℃ to +100℃
Cold-hot adhesiveOK
Under water adhesiveOK
Elastic Recovery Ratio (%)96
Mass-loss Rate (%)35

Service Restriction

The product is not applicable to structure assembly or projects whose base material has a surface temperature above 40℃.