UL insualtion systems that include P. Leo tapes
| System Provider | 130°C (Class B) | 155°C (Class F) | 180°C (Class H) | 200°C (Class N) |
| P. Leo (OBJS2), E200050 (Ground & Interwinding Mat'l) | B81/B82/B83/B85 (1P801, 1P802) | F81/F82/F83 (1P801, 1P802) | H82 (1PEN2, 1PEN2R) | N82/N83 (1PEN2, 1PEN2R) |
| Du Pont (Rynite, Zytel, Nomex, Mylar, etc.) | Z150N1/Z150SC | 1Z200V-1/R201V-1 | R315R1 | R400N2 |
| Ripley resin (Epoxylite) | B2 / B5 / B14 / B18 | F2 | H11 | N6 |
| Schnectady varnish | B4 | F1 | H1 | SCI-R1 |
| John C. Dolph varnish | Z152D | R201D/Z201D | R315D | n/a |
| P.D. George varnish | PDG-12 | PDG-9 | PDG-14 | R402G |
| Fel-pro varnish | B-1000/B-1150 | F-1000/F-2000 | H1000/H1340 H2000/H3000 | N2000/R2000 |
| Rubadue wire company inc | RXT1 | RXT2 | Du Pont T301 | n/a |