Dike-O-Seal Preform Seals




Dike-O-Seal Preform Seals provide an effective seal in foundry core boxes and gassing plates.

Dike-O-Seal can be installed and secured without use of an adhesive in most cases. Corners can be machined at 45° to the intersecting grooves and this will allow the Dike-O-Seal Preform Seal to be set in the groove without cutting and bonding ends together. Available in two hardnesses of 20 and 40 Shore A.

Freeman F-Bond Adhesives are designed for bonding Dike-O-Seal Preform Seals into core box channels. These are very fast setting cyanoacrylate adhesives which allow the core box to be quickly put into production.

This material is ordered by the full strip.



SKU Description   UM Thick Width Length Height Board ft. Net Wt. Diameter Grade Grit Plys Radius SPB Ship Note Min. Qty Pcs/Box Pcs/Bundle Winding Ft/Box Handle Len Head Diam Head Len Mfg. # Qty
177125 Preform Seal - Durometer 20 EA 50' GMS-3
177126 Preform Seal - Durometer 20 SO EA 1000' GMS-3
177130 Preform Seal - Durometer 40 EA 50' GMS-3
177115 Preform Seal - Durometer 20 EA 50' AUS-0
177120 Preform Seal - Durometer 40 EA 50' AUS-0
177140 Preform Seal - Durometer 20 EA 50' CT-1
177146 Preform Seal - Durometer 40 EA 50' CT-1
177147 Preform Seal - Durometer 40 SO EA 250' CT-1
177139 Preform Seal - Durometer 40 SO EA 100' HF-3
177138 Preform Seal - Durometer 20 SO EA 50' CWC-2
177141 Preform Seal - Durometer 40 SO EA 50' CWC-2
177105 Preform Seal - Durometer 20 EA 50' GMC-1
177801 Preform Seal - Durometer 20 NEW EA 50' GMC-1
177110 Preform Seal - Durometer 40 EA 50' GMC-1
177815 Preform Seal - Durometer 40 NEW EA 50' GMC-1
177102 Preform Seal - Durometer 20 EA 250' GMC-1
177108 Preform Seal - Durometer 40 SO EA 250' GMC-1
177142 Preform Seal - Durometer 20 EA 50' 1/8" RD
177143 Preform Seal - Durometer 20 EA 50' 1/4" RD
177144 Preform Seal - Durometer 40 SO EA 50' 1/4" RD
177148 Cutter For GMS-3 Preform Strip EA
177145 Cutter For GR-1 Preform Strip SO EA

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Important Information

  • Shipping: Freeman charges standard published UPS/FedEx shipping rates (unless freight is specified). All orders under $25 are subject to a $5 small order fee. International orders are subject to a $250 minimum order.

  • Liquid products are sold by weight, not volume.

  • SPB = Sheets per Box

  • HAZ-G = Hazardous material, cannot ship air, up to $33 surcharge applied for each package shipped ground within the US.

  • HAZ-A = Hazardous material, cannot ship air, no surcharge for ground shipping.

  • HAZ-T = Toxic material, must be sent by freight carrier.

  • FRT = must be sent by freight carrier due to size, weight, or hazardous classification.


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