KASTAR 738 Neutral Super Non Staining Silicone Sealant

Non-staining, Excellent adhesion, Odourless

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KASTAR 738 Neutral Super Non Staining Silicone Sealant is a plasticizer free neutral silicone sealant for sealing all type of joints in sanitary, glazing, facades and even in natural stone without the risk of edge soiling and staining on the substrates. Pollution-free to porous materials like marble, granite. Excellent sealing and decoration. Common silicone sealant, especially silicone weather-proofing sealant, easy to bring on pollution.


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Neutral & solidified; weathering resistant; ultraviolet resistant; ozone resistant; water resistant; high and low temperature resistant.


  • KASTAR 738 belongs to RTV-1. Good extrusion and thixotropy between 40°C~400°C.
  • Excellent adhesion to all types of marble, granite, and cement materials.
  • Release low-molecular-weight alcohol and no unpleasant odor during the cure.
  • Excellent resistance to weather, UV, ozone, and water.
  • Excellent resistance to low and high-temperature change.
  • No fragility, rigidification or crack at -500°C, and no softening, or degradation at 1500°C, when cured. It always keeps good elasticity.
  • Good compatibility with other neutral silicone sealants.
  • Containing anti-fungal compounds to prevent moldy growth in areas subject to high humidity levels.


1. Cementation & seal of aluminum, glass, etc;
2. Weathering cementation & seal of aluminum plates and enamel curtain walls.
3. Seal & cementation of al-alloy door & window, storefront; show window, diagonal and skylight corner line.
4. good sealing performance for galss, glass fiber, prottery & porcelain and greaseless material.
5. Weather sealing for stone curtain wall joints and precast slab joints.
6. Sealing for concrete expansion joints in tunnel and pavement.
7. Adhesion and sealing in expansion joint for ceramic engineering.
8. Joint sealing between stone and other materials like glass, metal, plastics etc.
9. General use in wet and humid areas where fungal resistance is a requirement.

Restriction of Usage

1. Can’t be used as a structural sealant.
2. Unsuitable for all kinds of material that can effuse grease, plasticizer, or solvent.
3. Unsuitable for the airproof location, because it is required to absorb moisture in the air to cure for the sealant.
4. Unsuitable for frosty or moist surfaces.
5. Unsuitable for a continually soggy or moist place.
6. Can’t be used if the temperature is below 40°C or above 400°C on the surface of the materials.


* 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.

Testing Standard

JC/ T882-2001 Silicone Building Sealant

Capacity movement±30%
Skin formation10-12 minutes
Drying time(2mm/h)5-6
Max. Tensile strength1.8
Hardness shore28±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 (%)15

Skin drying time and full drying time under 23℃and 50% humidity

Optional Color

Transparent, silver-grey, black and white.


Keep in 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;