The benefits of applying silicone sealant to your windows and doors... 💦 Applying silicone sealant to external window frames helps protect your home from the elements. It creates a waterproof barrier that stops rain from seeping in, preventing damp, rot, and mold. It also seals up any drafts or small gaps, improving insulation and helping to reduce energy bills. Silicone sealant keeps out insects and pests, and protects the structure from damage caused by water getting into the brickwork or ren