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Product Details

Otterlayer’s heat resistant foundry bib apron NC3-APB is a great economical solution for high heat protection needs. It is mounted onto the suspension of a hard hat using 4 Velcro tabs on a fire resistant cotton band, and provides protection for sides of head and neck of wearer.

Features of Otterlayer foundry and aluminized NC3-series spark deflectors:

  • Mounted onto the suspension of most hard caps, using 4 Velcro tabs on an FR cotton band at top of shroud
  • Covers sides and back of head and neck

Aluminized PBI is a knit blend of PBI® and para-aramid blend fibers with an aluminized coating. Despite being extremely lightweight and supple, aluminized PBI provides superior resistance to abrasions and chemical solvents. Its lighter weight and flexibility provide wearers with greater comfort and reduced fatigue.

On its own, PBI is an organic fiber with very unique properties. It was originally developed for NASA’s Project Apollo, in response to the need for greater heat protection. It does not burn in air, melt or emit toxic fumes. The addition of paraaramid blend provides extra strength and abrasion resistance.

Protective properties of aluminized PBI clothing material:

  • Light, comfortable and flexible
  • Can withstand very high contact temperatures - withstands contact with objects at temperatures of 800°F+
  • Excellent thermal, abrasion and chemical resistance
  • Radiant heat protection - up to 2000°F
  • Not recommended for heavy molten metal splash

Fabric composition and characteristics:

  • PBI® / para-aramid blend fibers with aluminum coating
  • Fabric Weight: 7 oz. / sq. yd.


Max contact heatVery high (over 800F)
Insulation levelLow
Abrasion and tear resistanceHeavy duty
Fabric flexibilityFlexible
Radiant heat protectionYes
Sparks resistanceYes