MATERIALS, ADHESIVES AND COATINGS
PL179 / PL224 / PL93 / NML46 / EPWA27 / NML35 / NML76 blade root sealants, abradable coatings and epoxy adhesives for aero engines
Country: United Kingdom · Model: PL179, PL224, PL93, NML46, EPWA27, NML35, NML76
A set of mastic, adhesive and abradable materials for assembly and repair of compressors and fans of gas turbine engines. It includes the blade root sealants PL179, PL224 and PL93, the abradable coatings NML46 and EPWA27, and the epoxy adhesives NML35 and NML76.
- PL179
- two-component high-temperature filler for gaps between compressor discs and blade roots
- PL224
- air-drying blade root sealant, up to 400 °C, resistant to aviation fluids
- PL93
- one-component silicone aluminum filler > 250 °C for HP compressor disc slots
- NML46
- one-component thick-film abradable mastic coating for compressor parts; machinable; resistant to oils, fuel, abrasive
Technical specifications
| PL179 | two-component high-temperature filler for gaps between compressor discs and blade roots |
|---|---|
| PL224 | air-drying blade root sealant, up to 400 °C, resistant to aviation fluids |
| PL93 | one-component silicone aluminum filler > 250 °C for HP compressor disc slots |
| NML46 | one-component thick-film abradable mastic coating for compressor parts; machinable; resistant to oils, fuel, abrasive |
| EPWA27 (PX/HX 443D) | graphite-filled two-component abradable compound; Shore D 72–75 (ASTM D2240); engine rings of the AV-8B Harrier |
| NML52 | one-component primer-adhesive for abradable coatings |
| NML35 A/B | two-component low-temperature-cure epoxy adhesive-sealant, non-sagging (bonding PTFE pads to fan discs) |
| NML76 | low-temperature sealant/adhesive with nylon flock filler |
| Customs codes (for reference) | |
| NSN (NATO Stock Number) | 8010-99-799-9449 (per the manufacturer's document, to be confirmed by packaging) |
Specifications are taken from the manufacturer’s technical documentation. Updated . Customs codes are for reference only; the final code is determined at customs declaration for the specific model.
Description
Blade root sealants close the air gaps between the disc rim and the root part of the blades, reducing air leakage and fretting. The PL179 is two-component and high-temperature, the PL224 dries in air, is resistant to aviation fluids and hardly expands or shrinks up to 400 °C. The PL93 is one-component, silicone, with aluminum, withstands over 250 °C and works in the slots of high-pressure compressor discs. Abradable coatings are applied to the casing rings above the blade tips, so the blade wears away the layer and is not damaged itself. The NML46 is one-component and thick-film, can be machined after curing, is resistant to oils, fuel and abrasive, and adhesion is provided by the NML52 primer. The EPWA27 (PX/HX 443D) is graphite-filled and two-component, with a hardness of 72–75 Shore D (ASTM D2240), and was previously installed on the rings of the AV-8B Harrier engine. Among the adhesives, the NML35 A/B is non-sagging and low-temperature curing and is used to bond PTFE pads to fan discs, and the NML76 contains a nylon flock filler.
How to choose
Choose by function. To close gaps in blade roots take the PL179, PL224 or PL93, which differ in temperature and method of application. To restore the rings above the blade tips the NML46 or EPWA27 is suitable. For general bonding there is the NML35 A/B, and when a nylon flock filler is needed, the NML76. See the data sheets for curing modes and packaging.
Request a price and lead time
PL179 / PL224 / PL93 / NML46 / EPWA27 / NML35 / NML76 blade root sealants, abradable coatings and epoxy adhesives for aero engines. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
Which blade root sealant withstands over 250 °C?
The PL93, a one-component silicone filler with aluminum for gaps between the roots and the slots of high-pressure compressor discs.
What are the abradable coatings NML46 and EPWA27 for?
They are applied to the casing rings above the blade tips. The blade wears away the layer rather than being damaged, so the engine runs with a minimal radial clearance.
What is the hardness of the EPWA27 abradable compound?
72–75 Shore D (ASTM D2240). It is the graphite-filled two-component compound PX/HX 443D.
Which primer is needed under the NML46?
The one-component primer-adhesive NML52.
How does the NML35 A/B adhesive differ from the NML76?
The NML35 A/B is an epoxy, non-sagging, two-component adhesive used for PTFE pads on fan discs. The NML76 is a low-temperature sealant-adhesive with nylon flock.
Similar products
C-RAM RGD / KR / KRS / KFS / VHPC-RAM RGD / KR / KRS / KFS / VHP rigid and cast iron-epoxy and iron-silicone absorbers, radar-absorbing paints
C-RAM EVA / SFC-MP / ODP / CFCC-RAM EVA / SFC-MP / ODP / CFC higher-power, ventilated, all-weather and cleanroom pyramidal absorbers
UV15DC80 / UV22DC80-1 / UV26DC / LED401 / LED422DC90Dual-Cure Systems (UV/LED + Heat) for Shadow Areas
EP21TP-2NV / EP21TPFL-1 / EP21TPHT / EP30D-7 / Super Gel 9Epoxy-Polysulfide and Urethane-Modified Flexible SystemsREQUEST
Need a price, lead time or replacement?
Send us a request and we will confirm the configuration, lead time and delivery terms. We reply by email.