Elastomeric compositions and their applications

A condensation curable gel composition for making a gel which is the reaction product of the composition, the composition comprising:

• (i) at least one condensation curable silyl terminated polymer having at least one hydrolysable and/or hydroxyl functional group(s) per molecule;
• (ii) a cross-linker selected from the group of a silicone, an organic polymer, a monosilane or a disilane molecule which contains at least two hydrolysable groups per molecule;
• and
• (iii) a condensation catalyst selected from the group of titanates or tin (II);
• wherein the molar ratio of hydroxyl and/or hydrolysable group(s) in polymer (i) to hydrolysable groups from component (ii) is between 0.5:1 and 1:1 using a monosilane cross-linker or 0.75:1 to 3:1 using disilanes;
• wherein the composition is free of zirconate catalysts;
• wherein the titanates comprise M-OR functions where M is titanium and R is an aliphatic hydrocarbon group;
• and
• wherein the molar ratio of M-OR or tin (II) functions to the hydroxyl and/or hydrolysable group(s) in polymer (i) is comprised between 0.01:1 and 0.5:1.