Caulk will not stick to dust, grease, or moisture.
Resealing a fixed window is a straightforward, cost-effective maintenance task that significantly improves comfort and energy efficiency. By removing old sealant, cleaning thoroughly, selecting the correct exterior-grade sealant, and applying it with proper technique, a homeowner can extend the life of a fixed window by many years. The most critical factors are surface preparation and matching sealant type to the location (exterior vs. interior, glass vs. frame).
Report compiled as a general guide. Always follow local building codes and manufacturer safety data sheets for sealants. how to reseal a window fixed
This is the felt, vinyl, or rubber fin that seals the gap between the sliding/moving part of the window and the fixed frame. Symptoms: You feel a breeze when you put your hand near the edge of the open sash, or you hear rattling when the wind blows.
If you have a stationary window (a picture window or a fixed sash) that is leaking air or water, follow these steps to reseal the exterior edges. Caulk will not stick to dust, grease, or moisture
Tools Needed:
Steps:
| Sealant Type | Best for | Pros | Cons | |--------------|----------|------|------| | 100% Silicone | Glass-to-frame, exterior | Extremely flexible, waterproof, UV-resistant | Not paintable, difficult to remove | | Polyurethane | Frame-to-wall (masonry/wood) | Very durable, adheres to many surfaces | Requires solvent cleanup, shorter shelf life | | Acrylic Latex | Interior only | Paintable, low odor, water cleanup | Less flexible, not weatherproof | | Butyl Rubber | Older metal frames | Good adhesion to metal | Messy, shrinks over time |
Recommendation: For exterior fixed windows, use high-grade silicone (e.g., GE Supreme Silicone or Dow 795) for glass-to-frame, and polyurethane (e.g., SikaFlex) for frame-to-wall masonry gaps. Report compiled as a general guide
A “fixed” window sometimes cannot be fixed. Call a glazier or window contractor if:
Expected pro cost: $200–$500 to reseal a large fixed window, vs. $50 in materials for DIY.