About Sealant Flexibility
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Structural Sealants

These structural sealants combine the mechanical strength of an adhesive with excellent sealing properties and high flexibility. They’re non-sagging, so they won't drip from vertical and overhead surfaces.
Elongation and joint compression/expansion tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain. For joints between dissimilar materials and in environments with wide temperature fluctuation, choose a sealant with a higher elongation or joint compression/expansion tolerance. For high-wear applications, choose a harder sealant for the most abrasion resistance.
Container | ||||||||||||
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Mfr. Model No. | Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Elongation | Joint Compression/ Expansion Tolerance | Hardness | Temp. Range, °F | For Joining | Choose a Color | Each | |
Sika Sikaflex Polyurethane | ||||||||||||
15LM | 10.1 | Cartridge | 6 hrs. | 7 days | 700% | -50% to 100% | Soft (Durometer 20A) | -40° to 170° | Metal Metal to Plastic Metal to Rubber Metal to Composites Plastic Plastic to Rubber Plastic to Composites Rubber Rubber to Composites Composites Masonry Wood | 00000000 | 000000 |
Primer for Sika Sikaflex Sealants (3.4-oz Bottle) | 0000000 | Each | 000000 |
High-Strength Concrete Joint Sealants

Seal concrete joints in high-traffic areas—these sealants stand up to heavy wear and tear, such as steel wheel traffic. They're non-sagging, so they won't drip from vertical and overhead surfaces. Made from silicone, sealants are RTV (room-temperature vulcanizing).
Elongation and joint compression/expansion tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain. These sealants are best suited to joints between similar materials that aren't exposed to wide temperature fluctuation. For high-wear applications, choose a harder sealant for the most abrasion resistance.
Container | For Max. Crack | |||||||||||||
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Mfr. Model No. | Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Elongation | Joint Compression/ Expansion Tolerance | Hardness | Wd. | Dp. | Temp. Range, °F | For Joining | Color | Each | |
Sika Sikasil Silicone | ||||||||||||||
728 NS | 29 | Cartridge | 25 min. | 7 days | 1,000% | -50% to 100% | Soft (Durometer 10A) | 1" | 1/2" | -80° to 350° | Metal, Plastic, Rubber, Composites, Masonry, Wood | Limestone | 0000000 | 000000 |
Primer for Sika Sikasil Sealant (8-fl. oz. Bottle) | 0000000 | Each | 000000 |
Textured Concrete Joint Sealants

The textured finish matches concrete surfaces. These sealants are non-sagging, so they won't drip from vertical and overhead surfaces.
Elongation and joint compression/expansion tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain. These sealants are best suited to joints between similar materials that aren't exposed to wide temperature fluctuation.
Container | For Max. Crack | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Elongation | Joint Compression/ Expansion Tolerance | Hardness | Wd. | Dp. | Temp. Range, °F | For Joining | Color | Each | |
Hybrid Polymer | |||||||||||||
10.1 | Cartridge | 2 hrs. | 24 hrs. | 600% | -25% to 25% | Medium (Durometer 46A) | 1/2" | 3/8" | -40° to 155° | Metal, Asphalt, Composites, Masonry | Gray | 000000 | 00000 |