BISCO HT-840 Extra Firm Cellular Silicone is a very firm grade silicone foam that offers superior sealing capabilities. HT-840 silicone provides a higher tear and tensile strength than our lighter grade foams. HT-840 silicone is designed for use in enclosures requiring a more durable, high closure force gasket. This material is also ideal for use in press pads requiring greater conformability and even pressure distribution at high temperatures. HT-840 silicone is a great choice for sealing and protecting outdoor communication, lighting and electronic enclosures from small dust particles, wind-driven rain and fire.

Features

  • Compact cell structure
  • Available in thicknesses from 0.063 to 0.250 in.
  • Typical density of 28 PCF
  • CFD range of 16-26 PSI
  • Resistant to UV, ozone, extreme temperatures and flame

Benefits

  • Provides enhanced durability and sealing performance
  • Offers consistent performance in all environments
  • Reduces maintenance costs associated with gasket failures due to compression set and softening

Downloads

Description Language File Type File Size
Data Sheet
BISCO® HT-840 - Extra Firm Cellular Silicone English
433KB
BISCO® HT-840 超硬硅胶泡棉产品数据表 中文
1007KB
Technical Information
BISCO® Foams and Solids Nomenclature Technical Bulletin English
194KB
BISCO Silicones Shelf Life, Storage & Handling English
577KB
BISCO® 硅胶的保质期、存储和处理 中文
1MB
BISCO Silicones Chemical Resistance Guide English
63KB
Silicone Adhesive Liner Removal Process of BISCO Silicones English
424KB
BISCO Silicones Environmental Bulletin English
2MB
UL157 Gasket and Seals Rating for BISCO Silicones and PORON Polyurethanes Nederlands
2MB
Automotive Specification Summary for PORON® Polyurethane and BISCO® Silicone Materials English
363KB
PET Liner Removal Process for BISCO Silicone Cellular Foam English
305KB
UL Listing
BISCO®硅胶和PORON®聚氨酯的UL 157衬垫和密封等级 中文
3MB
Brochures
BISCO Material Selection Guide English
486KB
High Performance Tapes - ARLON, BISCO, DeWAL English
1MB
49CFR238 & EN45545 Rail Solutions Brochure English
6MB

Applications

View current applications of this product.

Cold Supply Chain

Cold Supply Chain

Gap Filling

Gap Filling

Gasketing & Sealing

Gasketing and Sealing

Shock Absorption

Shock Absorption

Vibration Management

Vibration Management

Tools

Explore our calculators, conversion tools, technical papers and more.

  • BISCO® Product Properties Guide

    Filter BISCO® product information by various criteria, including property groups, product category or units, to find the best material for the application.

  • Application Design Tool

    Determine the best BISCO® silicone or PORON® polyurethane material for specific design application.

  • Compression Force Deflection Curve Tool

    Identify design-appropriate BISCO® silicone, PORON® polyurethane and ARLON® silicone materials using stress-strain data.

  • Impact Prediction Tool

    Select the best BISCO® silicone or PORON® polyurethane for energy absorbing applications using impact data.

  • Vibration Isolation Tool

    The Vibration Isolation Tool recommends the proper BISCO® silicone and PORON® polyurethane materials for your vibration mitigation applications.

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