1. Purpose Compatibility

   • Ensure the sealant is suitable for the specific application (e.g., windows, bathrooms, roofs).

2. Material Type

   • Choose the right sealant for the materials being joined (e.g., wood, metal, plastic).

3. Temperature Resistance

   • Check the sealant's performance in various temperature ranges, especially for outdoor applications.

4. Curing Time

   • Consider how long the sealant takes to cure and when it can be painted over, if necessary.

5. Flexibility

   • Look for flexibility to accommodate movement and prevent cracking over time.

6. Water Resistance

   • Ensure the sealant is waterproof if it's being used in wet environments.

7. Mildew and Mold Resistance

   • For bathrooms and kitchens, choose sealants that resist mold and mildew growth.

8. Application Method

   • Consider the ease of application; some sealants come in tubes for caulking guns, while others are in cartridges.

9. UV Resistance

   • For outdoor uses, select sealants that offer UV protection to prevent degradation from sunlight.

10. Adhesion Strength

    • Make sure the sealant has a strong bond to the materials you're working with.

11. Safety and VOC Content

    • Check for safety information, including volatile organic compound (VOC) levels, and ensure proper ventilation during use.

12. Cost Effectiveness

    • Compare prices, but consider quality over cost for long-lasting durability.

13. Manufacturer Reputation

    • Research brands and read reviews to choose products known for reliability and performance.

14. Shelf Life

    • Pay attention to the sealant's shelf life and storage requirements.

15. Color Matching

    • If aesthetics matter, find a sealant available in colors that match your project.

By considering these factors, you can select the right sealant for your needs and ensure a successful application.