SikaLastomer®-95 Butyl Sealing Tape
SikaLastomer-95 Isobutylene Tripolymer Tape is a high-performance butyl tape designed for sealing and bonding applications where a durable, watertight seal is needed. Known for its excellent adhesion and weather resistance, Sikalastomer 95 performs well on various substrates, including metal, plastic, and glass. Its non-hardening formula ensures flexibility even in temperature fluctuations, making it ideal for automotive, construction, and industrial applications where long-lasting seals are required.
Applications include: Sealing for skylights, roof vents, or bolted lap joints of galvanized and epoxy painted metals, concrete, EPDM rubber, metal piping, glass, plastics, and wood.
- Almost odorless
- Paintable
- Resistant to mold and fungus
- Won’t stain surfaces
- No cracking, bleeding or loss of rubbery characteristics
- Excellent chemical resistance, ozone, vapor, and alcohols
- Designed to bond through oily galvalume, aluminzed steel, galvanized metal, and aluminium
- Bonds well to difficult to bond painted metals
| Property | Specification |
| Chemical Base | Butyl |
| Color | Gray |
| Specific Gravity (ASTM D 792) | 1.44 to 1.56 |
| Total solids (ASTM C 771) | 100% |
| Penetration (ASTM D 217) - cone at 77°F / 300 gr | 70-90 (7.0-9.0 mm) |
| Flexibility (AAMA 800-92) (ASTM C 734) | No cracking or loss of adhesion at -60°F (-51°C) |
| Elongation (ASTM C 908) | 1100% min |
| Staining (ASTM D 925) | Will not stain painted or unpainted surfaces |
| Vehicle bleed out (ASTM C 771) - 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 |
| Application temperature | -5°F to 120°F (-20°C to 49°C) |
| Tensile adhesive strength (ASTM C 907) | 17 to 20 psi min (cohesive failure) |
| Peel adhesion (ASTM D 3330 –modified 90° peel) | 8 lbs/in. min (cohesive failure) |
| Corrosivity | No darkening, etching or salt deposits on GALVALUME®, KYNAR 500®, ZINCALUME®, aluminum, aluminized steel or galvanized metal |
| Weatherability (ASTM G 53) (1000 h exposure) | No cracking, bleeding or loss of rubbery characteristics |
| Static water head test (MBMA ice damming) | Sealant passes 8 in. water head in an erected interlocked panel joint |
| Service temperature permanent | -60°F to 212°F (-51°C to 100°C) |
| Shelf life (storage below 80°F (27°C)) | 18 months |
