Name: Alkoxy Silicone Crosslinker SCAL-50
Brand: Coatingsink
SKU: silicone-crosslinker-alkoxy-scal
Availability: InStock

Question 1

How does SCAL-50's alkoxy cure mechanism differ from acetoxy crosslinkers?

Accepted Answer

SCAL-50 releases methanol upon moisture-triggered hydrolysis of its methoxy groups, forming stable Si-O-Si crosslinks. This produces significantly lower odor than acetoxy systems (which release acetic acid) and avoids corrosion risk on metal substrates such as aluminium and copper, making it suitable for construction glazing and automotive sealing applications.

Question 2

What loading level is recommended in RTV-1 silicone sealant formulations?

Accepted Answer

Typical use level is 3–8 phr relative to the polydimethylsiloxane base polymer. Higher loadings increase crosslink density and improve tensile strength but may reduce elongation at break; optimize based on target modulus, Shore A hardness, and cure-depth requirements for the specific application.

Question 3

Does SCAL-50 support deep-section cure in thick sealant beads?

Accepted Answer

Yes. SCAL-50's low viscosity and reactive methoxy functionality allow the cure front to progress through sections up to 20 mm deep within 24–48 hours at standard conditions (23°C / 50% RH). Increasing ambient humidity or applying a light water mist to the bead surface accelerates surface skin-over time without compromising through-cure.

Flash Point	≤14°C
Active Content	≥98%
Density (25°C)	1.00 g/ml
Viscosity (25°C)	3–5 mPa·s
Recommended Dosage	3–8 phr

Alkoxy Silicone Crosslinker SCAL-50

Specifications

FAQ

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