KPT-1
Transparent high-temperature silicone
- Film meets UL 510
- COC Included
Couldn't load pickup availability
KPT-1 is a 1 mil polyimide film tape with silicone adhesive for gold-finger masking, wave soldering, hot air solder leveling (HASL) and electrical insulation of coils and transformers. Rated for 392°F (200°C) for 30 minutes. A Kapton™ alternative, available in 1" and 2" x 36 yd rolls, sold by the pack or case. Minimum purchase: six 1" rolls or three 2" rolls.
Key Features of KPT-1 Polyimide Tape
- 392°F (200°C) for 30 minutes — protects gold contacts from molten solder in wave solder and hot air leveling
- 23.8 oz/in adhesion, >20.6 lb/in tensile — silicone adhesive thermosets with heat for a stronger hold
- >4000 V dielectric, Class H — electrical grade 1 mil polyimide film (2.6 mil total tape thickness) for electrical insulation; film meets UL 510
- Minimal residue — removes after processing with little cleanup, reducing rejects
- Chemical and tear resistant — resists acids, oils, solvents, aging, staining and water immersion, with outstanding tear and abrasion resistance at temperature
What Is KPT-1 Used For?
- Masking gold contacts (gold fingers) during wave soldering
- Hot air solder leveling (HASL) masking
- High-temperature masking in electronics manufacturing
- Wrapping and fixing electronic components
- Insulating coils and transformers
Key Specifications
| Film (carrier) thickness | 1.0 mil (0.025 mm) polyimide film, electrical grade |
|---|---|
| Adhesive | Transparent high-temperature silicone (single-coated; thermosets with heat) |
| Liner | None |
| Total tape thickness | 2.6 mil (0.065 mm), film plus adhesive |
| Tensile strength | >20.6 lb/in |
| Adhesion | 23.8 oz/in |
| Elongation | >30% |
| Dielectric strength | >4000 V |
| Insulation class | Class H |
| Temperature resistance | 392°F (200°C) for 30 minutes |
| Colors | Gold (transparent) |
| Performance | Resists acids, oils, solvents, aging, staining and water immersion; minimal residue on removal; not flame retardant for aircraft interiors |
| Core | 3" plastic |
| Alternative to | Dielectric Polymer NT-590, Permacel P-221, 3M 5419 and 5433, Shurtape 6325-01, Scapa 557, Saint-Gobain/Furon 2345-1, Dewal 304-1, Ideal 9321 and IT-7170, TLC CT961, Specialty Tapes S2210, Lanmar 595-1, Chemfab 360-1S and tesa 4428 |
| Manufacturer P/N | KPT-1 |
| Brand | Adhesive Tape Products |
Why This Tape Matches Your Spec
KPT-1 is a 1 mil electrical grade polyimide film tape with a silicone adhesive. It is sold as an alternative to Kapton™ polyimide tapes; Kapton™ is a trademark of DuPont, and KPT-1 is not a DuPont product. The film meets UL 510, and the adhesive is formulated to meet MIL-P-46112B.
- Masking gold contacts (gold fingers) during wave soldering
- Hot air solder leveling (HASL) masking
- High-temperature masking in electronics manufacturing
- Wrapping and fixing electronic components
- Insulating coils and transformers
Approvals & Certifications
Available Sizes
Spec Guide
Frequently Asked Questions
What is KPT-1 used for?
KPT-1 is a 1 mil polyimide film tape for masking gold contacts during wave soldering and hot air solder leveling, high-temperature masking, and insulating coils and transformers.
Is KPT-1 the same as Kapton tape?
It is a Kapton™ alternative: a polyimide film tape with silicone adhesive in the same category. Kapton™ is a DuPont trademark, and KPT-1 is not a DuPont product.
What tapes does KPT-1 replace?
The catalog lists it as an alternative to Dielectric Polymer NT-590, Permacel P-221, 3M 5419 and 5433, Shurtape 6325-01, Scapa 557, Saint-Gobain/Furon 2345-1, Dewal 304-1, Ideal 9321 and IT-7170, TLC CT961, Specialty Tapes S2210, Lanmar 595-1, Chemfab 360-1S and tesa 4428.
What temperature can KPT-1 handle?
392°F (200°C) for 30 minutes.
Does KPT-1 leave residue?
It leaves minimal residue when removed after processing. The silicone adhesive thermosets with heat, which increases adhesion during the cycle.
What is the dielectric strength of KPT-1?
Over 4000 V, with a Class H insulation rating.
What is the difference between KPT-1 and KPT-2?
KPT-1 is a 1 mil gold electrical-grade film (2.6 mil total, >4000 V). KPT-2 is a 2 mil amber commercial-grade film (3.5 mil total, >8000 V) with higher tensile and elongation.
Does KPT-1 meet MIL-P-46112B or UL 510?
The polyimide film meets UL 510, and the tape is formulated to meet MIL-P-46112B. Contact us if you need certification documents.
What sizes does KPT-1 come in?
We stock 1" and 2" x 36 yd rolls on a 3" plastic core. Minimum purchase is six 1" rolls or three 2" rolls, sold as packs or by the case. Widths from 1/4" to 4" are available on request.
What is the lead time for KPT-1?
Typically 1–2 weeks.
Does KPT-1 come with a Certificate of Conformance?
Yes. A free Certificate of Conformance is included with every order, certifying the tape conforms to the supplier's product data. No request is needed.