Name: Silicone RTV-2 Crosslinker Component B
Brand: Coatingsink
SKU: silicone-rtv2-crosslinker-part-b
Availability: InStock

Question 1

What silicone base (Part A) is compatible with this RTV-2 crosslinker?

Accepted Answer

This Component B is designed for use with hydroxy-terminated polydimethylsiloxane (PDMS) base polymers in condensation-cure RTV-2 systems. The alkyl silicate crosslinker reacts with silanol groups on the base polymer, catalyzed by the tin catalyst. It is suitable for bases with viscosities from 1000–100000 mPa·s. Compatibility should be confirmed with a small trial mix before full-scale use.

Question 2

Why is the mix ratio important, and what happens if the ratio is wrong?

Accepted Answer

The tin catalyst and crosslinker levels in Component B are calibrated for the stated mix ratio (10:1 or 5:1 by weight). Under-dosing Component B results in incomplete cure, leaving tacky or soft areas. Over-dosing causes excessive brittleness and may accelerate aging degradation. Always weigh components accurately rather than estimating by volume, as densities of A and B differ.

Appearance	clear to pale yellow liquid
Active Component	alkyl silicate crosslinker + tin catalyst
Viscosity (25°C)	500–2000 mPa·s
Mix Ratio (A:B w/w)	10:1 or 5:1 per application
Cure Rate (25°C/50%RH)	tack-free 30–60 min

Silicone RTV-2 Crosslinker Component B

Specifications

FAQ

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