SikaLastomer®-65 Butyl Sealing Tape
SikaLastomer®-65 Isobutylene-Isoprene Copolymer Tape is a versatile butyl sealing tape known for its conformability and adhesion on a wide range of surfaces, from metal to plastics. This non-hardening tape provides exceptional weather and moisture resistance, ensuring long-term durability in demanding environments. Ideal for HVAC systems, automotive assemblies, and building applications, Sikalastomer 65 is easy to apply and offers dependable sealing performance under various temperature conditions.
Applications include: Exterior sealing and waterproofing on roofing, waterproofs rivet seams and lap seams in truck trailers and RVs, and sealing dissimilar metals.
- Superior surface tack
- Permanently elastic
- High tensile strength
- Webbing/Elongation
- Contains additive to inhibit microbial growth
- Asbestos free
- Will not stain surfaces
- No loss of adhesion, flexibility or softness, no loss of rubbery characteristics from weathering
| Property | Specification |
| Chemical Base | Butyl |
| Color | White |
| Specific Gravity (ASTM D 792) | 1.35 |
| Total solids (ASTM C 771) | 100% |
| Penetration (ASTM D 217) - cone at 77°F / 300 gr | 85-10 (8.5-10.0 mm) |
| Flexibility (AAMA 800-92) (ASTM C 734) | No cracking or loss of adhesion at -60°F (-51°C) |
| Elongation (ASTM C 908) | 1150% 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 | -4°F to 120°F (-20°C to 49°C) |
| Tensile adhesive strength (ASTM C 907) | 20 psi min (cohesive failure) |
| Peel adhesion (ASTM D 3330 –modified 90° peel) | 6 lbs/in. min (cohesive failure) |
| 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 |
