HF Mastic

Description

High-Performance Acid & Chemical-Resistant Mastic

HF Mastic is a specialized acid-resistant and chemical-resistant mastic designed for protective lining and jointing applications in industrial tanks, chemical plants, drains, and foundations. It provides exceptional resistance to hydrofluoric acid, corrosive chemicals, and mildly oxidizing acids, making it ideal for environments where standard bitumen or resin mastics may fail.

This trowelable and heat-meltable mastic is applied over primed concrete or brick surfaces to form a dense, impermeable, and durable chemical-resistant lining. HF Mastic offers excellent adhesion to primed surfaces, long-lasting protection against chemical attack, and ensures leak-proof joints and coatings in aggressive industrial conditions.

Key Features

Resistant to hydrofluoric acid, non-oxidizing acids, and chemicals

Provides a durable, impervious protective coating

Strong adhesion to concrete, brick, and metallic surfaces

Heat-meltable and trowelable for easy application

Applications

Chemical plants

hydrofluoric acid storage tanks

industrial floors

pipelines

corrosive environments

pits

Chemical & Temperature Resistance

  • Excellent resistance to hydrofluoric acid (HF)
  • Resistant to strong inorganic acids and mixed acid solutions
  • Good resistance to chloride and saline environments
  • Limited resistance to strong alkalies and oxidizing agents
  • Maximum service temperature: 120–140 °C (depending on acid concentration)

Surface Preparation

  • Substrate must be structurally sound, dry, and free from dust, oil, grease, laitance, and loose contaminants
  • Concrete surfaces should be mechanically roughened to enhance bonding
  • Apply a compatible HF-resistant primer or monolithic membrane prior to mastic application
  • Ensure slopes, levels, and alignment are completed before lining; post-application adjustments are not possible

Preparation & Mixing

HF Mastic is supplied in ready-to-use or two-component form (as specified).

01

If two-component, mix base and hardener thoroughly as per recommended ratio

02

Apply using trowel or spatula to achieve uniform thickness

03

Press bricks/tiles firmly to ensure full bedding and void-free joints

04

Avoid over-working once application has started

Setting & Curing

  • Curing occurs through chemical reaction or controlled hardening
  • Working time at 30 °C: 15–25 minutes
  • Initial set: 8–12 hours
  • Full chemical resistance: 7 days
  • Keep the lining dry and protected during curing

Physical & Mechanical Properties

Property Typical Value
Adhesion Excellent to concrete, ceramic & metal
Flexibility Moderate
Chemical Stability Excellent under HF exposure
  • HF pickling tanks and processing units
  • Acid-resistant brick and tile jointing
  • Chemical drains, sumps, and floors
  • HF storage and handling areas
  • Highly aggressive acid service zones
  • Shelf life: 24 months
  • Store in a cool, dry, shaded place away from heat and direct sunlight
  • Supplied in 20 Kg Slab
  • Export packing: Available as per customer requirement
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