Metalset® A4
Metalset®A4一旦固化，具有良好的加工质量（打磨、钻孔、攻丝），并耐碱、稀的酸和溶剂。应用包括阻止管道、阀门和油箱（即汽车油箱）的泄漏、粘接不同表面、填充金属接头、凹痕等，木材、混凝土中锚固螺栓和修复金属表面。
Bell Spec - Metalset A4符合所有质量要求，并且通过Bell Spec 299-947-099 Rev. D认证（详见下文）
说明
Store and use material at room temperature (73°F/23°C). This product has a limited shelf life and should be used as soon as possible.
A clean, dry surface is essential for successful adhesive bonding. Porous materials are simple to bond, provided they are dry. The surface should be sanded till clean followed by wiping surface with solvent (acetone, MEK, mineral spirits). Let solvent evaporate fully before applying A4.
Non-porous surfaces (metals, plastics, coated woods) should be sanded, sandblasted or chemically etched. If sanding or sandblasting, follow with solvent wash. Let solvent evaporate fully before applying A4. Epoxy adhesives do not perform well on metals such as nickel, chromium, tin or zinc or on soft thermoplastics like polyethylene. An option would be to try a polyurethane adhesive (such as URE-BOND® from Smooth-On).
Because no two applications are quite the same, a small test application to determine suitability for your project is recommended if performance of this material is in question.
MEASURING, MIXING, APPLYING...
Metalset™ A4 is mixed one part A to one part B by weight or volume. If dispensing from tubes, squeeze out equal amounts from each tube. Try to be as accurate as possible. Mix thoroughly for 3 minutes to a uniform grey color (no streaks) and apply to prepared surface at a thickness of 1/32” - 1/16” (0.08cm - 0.16cm). Fit other surface over epoxy and apply even pressure using clamps or weights. Handling time is 4 hours. Full cure is 16 hours.
CURING...
Metalset™ A4 will cure in 16 hours at room temp. (73°F/23°C). Applying mild heat will cure A4 faster–150°F/65°C for 2 hours.
Post Curing - After A4 has cured at room temperature, heating the epoxy to 150°F (65°C) for 4 to 8 hours will increase physical properties and performance. Let cool to room temperature before moving bonded substrates, machining, etc.
CERTIFYING TO BELL SPEC...
Metalset™ A4 meets all quality requirements and can be certified to Bell Spec 299-947-099 Rev. D, IOM 80-2017-017. There is a fee associated with certification. Contact Smooth-On, Inc. for further information at (610) 252- 5800 (8:30-5:30 Eastern Time).