Cut a piece of silicone coated fabric that is a little bit bigger than the actuator top part.
Mix a small batch of EcoFlex and pour a little onto the surface.
Use a gloved finger to even out the liquid material over the whole surface - in a thickness of approx. 1 mm.
Place the actuator top part into the uncured silicone, with the open side facing down. Gently press it into contact with the material
Place a rectangular piece of wood (or something similar) atop the actuator top part to gently weigh it down thus ensuring contact with the strain limiting bottom during curing
Cure the acutator by putting it in the oven for approx. 35 mins. at 80°C or leaving at room temp. for 4 hours - the latter will create the most strongest bond between the two parts
Once the silicone has cured, cut of the excess fabric along the sides of the actuator with a pair of scissors or by using a ruler and an X-Acto knife