The hardest part of buying a construction sealant isn't finding one-it's choosing the format that matches your job. The four options here range from a single 10.1 fl oz cartridge to a 12-tube box, and the listed price spread runs from $13.21 to $98.95. You'll need to decide how much material you want to store, what color the sealant should be, and whether the project calls for a paintable finish or a hybrid formula that can handle wet surfaces and cold weather.
Quick Take
- The ASI-55 12-pack is the bulk option, with 12 sausage tubes of 20 oz each.
- The Sikaflex 1A 2-Pack is a middle-ground choice in aluminum gray.
- The flex Construction Sealant is a single paintable aluminum-gray cartridge.
- The SIKA Sikaflex White is the lowest-priced single cartridge.
Listed Price Comparison
| Product | Listed Price | Price Bar | Pack / Format |
|---|---|---|---|
| ASI-55 Industrial & Construction Sealant / Adhesive Sausage, gray 20oz | USD 98.95 | 12 sausage tubes | |
| Sikaflex 1A Polyurethane Construction Sealant, Aluminum Gray, In Date | USD 29.99 | 2 cartridges | |
| flex Construction Sealant, Aluminum Gray, Paintable Polyurethane | USD 31.99 | 1 cartridge | |
| SIKA Sikaflex Construction Sealant, White | USD 13.21 | 10.1 fl oz cartridge |
Decision Matrix
Match the product to your situation:
- Large project or difficult conditions: The ASI-55 12-pack is the only option that gives you a full box of tubes, and the hybrid polyether formula is listed for wet surfaces and below-freezing temperatures.
- Two-cartridge convenience: The Sikaflex 1A 2-Pack gives you a second cartridge without committing to a bulk box. It's suited to windows, doors, and joints.
- Single, paintable, aluminum-gray tube: The flex Construction Sealant is a one-cartridge choice for joint and gap work.
- Lowest listed price, single white tube: The SIKA Sikaflex Construction Sealant fits most application guns and includes a multitool accessory.
Product Notes
ASI-55 Industrial & Construction Sealant / Adhesive Sausage (Gray, 12-Pack)
This is the bulk pick. The box includes 12 sausage tubes at 20 oz each, so a single purchase gives you 240 oz total. ASI-55 is a hybrid polyether product that can be applied to wet surfaces, in below-freezing temperatures, and other difficult scenarios, which makes it especially useful for construction work where conditions aren't ideal. The price is the highest in this comparison at USD 98.95, and the format is tailored to jobs that need a lot of material; a small repair would leave you with many unopened tubes. Choose it when you have a large sealing task, not for a single crack.
Sikaflex 1A Polyurethane Construction Sealant (Aluminum Gray, 2-Pack)
This 2-pack sits between one cartridge and a 12-tube box. You get two aluminum-gray cartridges of Sikaflex 1A polyurethane construction sealant, and the pack is in date, so it is ready to use. The product is aimed at sealing windows, doors, and joints, making it a practical choice for common construction sealing. At USD 29.99, it is a compact multi-cartridge buy that avoids the commitment of a bulk box. The limitation is the format: only two cartridges are included, and the color is fixed to aluminum gray, so it will not match every surface. If a single white cartridge is enough, the SIKA Sikaflex White is the lower-price route.
flex Construction Sealant (Aluminum Gray, Paintable Polyurethane)
This single-cartridge option is built for joint and gap sealing with an aluminum-gray, paintable polyurethane formula. The cartridge weighs 16 ounces and measures 1.87 x 1.87 x 12 inches, so it is a targeted repair size rather than a high-volume supply. The formula won't stain surfaces, which is helpful when the bead will be visible. At USD 31.99, it costs more than the white Sika single cartridge, but it delivers a paintable aluminum-gray color in a no-multi-pack package. The trade-off is the single-cartridge format: you get one tube, so it's best for a specific gap, seam, or joint rather than a job that needs multiple cartridges.
SIKA Sikaflex Construction Sealant (White, All-Purpose Polyurethane)
This white, all-purpose Sika cartridge is the lowest-priced item in the comparison at USD 13.21. It holds 10.1 fl oz of polyurethane sealant and fits most electric, pneumatic, or hand-powered application guns, so it is easy to use with standard equipment. An included multitool accessory helps smooth or shape the bead. The format is a single cartridge, and the color is white, so it is best for a visible repair or a small joint/gap task rather than a bulk project. If you need a gray sealant or more than one tube, the other options in this group offer those formats.
Final Recommendation
Start with the size of the job. For a large project that needs many tubes, the ASI-55 12-pack is the clear bulk choice. For a moderate job where you want two tubes and a gray Sika polyurethane, the Sikaflex 1A 2-Pack fits. If you need exactly one paintable aluminum-gray cartridge, the flex Construction Sealant handles the task. And if you want the lowest listed price for a single white all-purpose cartridge, the SIKA Sikaflex Construction Sealant is the simple pick.
