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Hearthstone Ceramic Blanket Strips – Catalyst Gasket Replacement (3120-035)


This is an OEM Hearthstone Ceramic Blanket Strip/Gasket for the Catalyst in certain Hearthstone wood stoves. This part will ship new in the manufacturers packaging.

Description: These are replacement blanket strips/gasket that are used to insulate and protect the catalyst in several models of HearthStone wood stoves.  Please note that these are sold individually – often times (2) are required for a full replacement.  Please ensure to select the correct quantity from the drop down menu. The more you buy the more you save!

OEM Part Number:  3120-035

Applicable HearthStone Models: 

  • HearthStone Heritage IV 8024 Wood Stove
  • Hearthstone Castleton I 8031 Wood Stove

Please reference these installation instructions.

This HearthStone Heritage gasket strips are in stock ready to ship.

Weight 1 lbs
Dimensions 9 × 7 × 3 in

1, 2 (Save 5%), 3 (Save 10%), 4 (Save 15%)


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