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Pr-1428 Class B Access Door Sealant Semkit - B2 - 6 Oz Kit

$198.85/Each
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Part# 09-04706
MFR Model# 1428B002MI654SK

Overview

PR-1428 Class B is a low adhesive sealant. It has a service temperature range -65F (-54C) to 250F (121C), with intermittent excursions up to 250F (135C). The material is designed for use as an access door sealant or in the fabrication for form-in-place (FIP) gaskets. It can also be used to protect electrical wired, terminals and equipment against fuel moisture, dirt and short circuits.

PR-1428 Class B is a two-part, manganese dioxide cured, polysulfide compound. The uncured material is a low sag, thixotropic paste suitable for application by extrusion gun or spatula. It cures at room temperature to form a removable seal to common aircraft substrates.

Features

  • Application life (hours): 2
  • Tack free time (hours): <8
  • Cure time to 20 A Durometer (hours): 24

Specifications

  • BMS 5-37 - Type 1 Class B-1/2 - BOEING
  • BMS 5-37 - Type I Class B-2 - BOEING
  • DHMS-S3.02 - B-1/2 - DE HAVILLAND INC.
  • DHMS-S3.02 - CLASS B-2 - DE HAVILLAND INC.
  • MEP 09-082 - CLASS B-1/2 - EMBRAER
  • MEP 09-082 - CLASS B-2 - EMBRAER
  • MIL-S-8784 - Class B-1/2 - MILITARY SPECIFICATION
  • MIL-S-8784 - Class B-2 - MILITARY SPECIFICATION

Reviews

very pleased

Janet
October 28, 2020

Does just what it says. Pretty easy to mix in the cartridge. Two hour open time allows plenty of time to work. I applied sealant with a brush instead of the PPG applicator. Brushing works fine for fuel tank access door flanges. No noticable odor, which is nice. I was able to clean up easily with acetone before the sealant cured. Does require 24 hours to fully cure. I only re-sealed one access panel, but six ounces would probably do every tank access panel on a 182.

Jerry L
September 15, 2017

Q&A

Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: What size/quantity is this item?

6 oz kit.

Q: What is the shelf life i.e. expiry date for the PR-1428 sealant?

Per manufacturer: it is "12 months from Date of Production."

Q: A review says this can be used on fuel tank access panels. Is this a correct?

Yes that is correct.

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