Materials of Construction - Acid Resistant Linings - Pecora Mastic
November 22, 2017

Introduction

PECORA A-103 Mastic is an asphaltic, fibrous, chemically resistant trowel-consistency material.  It is recommended as an acid-resistant coating applied between the brick work and metal shell of towers and pump tanks.

PECORA A-103 Mastic sets up to a firm but elastic film.  It is sometimes used on its own but more often with an acid resistant membrane such as PTFE film or Rephanol ORG.

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Physical Properties

Color:                         Black
Base:                         Processed Asphalt
Solids:                        75% (approximately)
Drying Time:               A thin skin forms in approximately 90 minutes at 25°C (77°F)
                                  A 6 mm (1/4") thick film will set in approximately 48 hours at 25°C (77°F)
Flash Point:                Over 32°C (90°F) (T.C.C.)
Density:                      8.9 lb/USgal
Solvent:                      Aromatic and Aliphatic
Softening Point:          Dried mastic will soften above 93°C (200°F)
Cleaning:                    Mineral spirits

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Vendor

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