There are different types and grades of caulk, I like one called “Big Stretch”, it stays flexible
https://www.sashco.com/hi/bigstretch.html
It won’t crack—it just stretches.
Window frames move away from the siding or doors shift against the brick. They move when the temperature changes, the wind blows, or the ground swells. Big Stretch provides the adhesion and flexibility to handle the movement.
Big Stretch® is a 100% acrylic latex, high-performance caulk with powerful adhesion and elasticity. Big Stretch will stretch and compress to absorb just about any movement a home can dish out. It spans gaps up to 2″ wide and stretches up to 500% of the original joint size without cracking.
Features & Benefits
- Super elastic—moves instead of tears
- For interior and exterior use
- Highly durable
- Low VOC
- Superb paintability
- Freeze-thaw stable
- Limited Lifetime Warranty
- Stop-flow plunger
- Paintable with exterior latex paints/stains after 4 hours
- Paintable with interior latex paints/stains after 24-48 hours
- Soap and water cleanup
- Available in 13 colors → View Color Chart
- Available in 10.5 oz and 29 oz. cartridges *
* 29 oz. cartridge is only available in white.
Usage
It’s perfect for many interior and exterior applications, including:
- windows
- doors
- siding
- vents
- soffits
- eaves
- baseboards
- crown molding
- sound-proofing interior walls
It adheres to most building materials, including:
- aluminum
- brass
- nylon
- steel
- anodized windows
A variety of plastics and other surfaces, including:
- ABS
- acrylic sheet
- Plexiglas
- PVC
- fiberglass
- urethane
- vinyl
- nylon
- asphalt
- tile
- wood
- glass
- mortar/stone/cinder block
- stucco/brick/concrete
- EIFS
- drywall / fiber cement
Yeah, I just put up a big ol’ commercial for Big Stretch… ;) It’s what we use out here in far west Texas, it does hold up to the sun, wind and monsoon season, I get it from my local hardware store.
Wretha