SikaLastomer®-68 Butyl Sealing Tape
SikaLastomer-68 Ethylene Propylene Copolymer Tape offer a high adhesion and robust seal. This butyl rubber-based tape provides outstanding durability against weathering, making it suitable for outdoor applications. With a unique viscoelastic property, Sikalastomer 68 maintains a tight, moisture-resistant bond on complex shapes and surfaces, widely used in the construction, transportation, and marine industries for superior adhesion.
Applications include: Sealing for bolted lap joints of galvanized and epoxy painted metals, concrete, EPDM rubber, metal piping, glass, plastics, and wood.
- Almost odorless
- Resistant to mold and fungus
- Will not stain surfaces
- No loss of adhesion, flexibility or softness, no loss of rubbery characteristics from weathering
- Excellent webbing and elongation properties
| Property | Specification |
| Chemical Base | Ethylene Propylene Copolymer |
| Color | Black |
| Specific Gravity (ASTM D 792) | 1.20 |
| Total solids (ASTM C 771) | 100% |
| Penetration (ASTM D 217) - cone at 77°F / 300 gr | 80 to 95 (8.0 to 9.5 mm) |
| Flexibility (ASTM C 765) | No cracking or loss of adhesion at -22°F (-30°C) when bent around 3/8” mandrel (9.5mm) |
| Elongation (ASTM C 908) | 700% min |
| Staining (ASTM D 925) | Will not stain painted or unpainted surfaces |
| Vehicle bleed out (ASTM C 772) - 158°F (70°C) for 21 days | No exudation of vehicle on Whatman No.40 filter paper |
| Crazing to acrylic plastics | Will not craze plastics |
| Tensile adhesive strength (ASTM C 907) | 18 psi (typical failure mode 100% cohesive) |
| Resistance to fungus/mildew growth | Will resist fungal attack and not support mildew growth. |
| Corrosivity | Aluminized: None Galvanized Metal: None |
| Weatherability (ASTM G 53) (1000 h exposure) | Excellent condition; no loss of adhesion, flexibility or softness, no loss of rubbery characteristics. |
| Service temperature | -22°F to 180°F (-30°C to 82°C) |
| Shelf life (storage below 80°F (27°C)) | 18 months |
