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WESLASTOMER™ DIE CUT GASKET MATERIALS

Taking the guess work out of specifying die cut gaskets.

Why We Created WesLastomer™

Our performance WesLastomer™ solid and sponge gasket materials were designed to keep the material selection process simple. Select the proper WesLastomer material and then let Modus Advanced die cut your gasket in our AS9100 certified manufacturing facility.

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Key Benefits

Proven Reliability

AS9100 Quality System

Quick-turn Gasket Manufacturing

Ultra-Precise Waterjet Cutting Option

3M Adhesive Backing Available

WESLASTOMER™ DIE CUT GASKET MATERIALS

WesLastomer™ Solid Materials - Custom Die Cut Gaskets

We use the highest quality sheet rubber and silicone to customize precisely what our customers want. Our WesLastomer rubber and silicone sheet brand is designed for a wide range of uses, including gasket and sealing applications. With extremely fast turnaround using our state-of-the-art in-house manufacturing processes, Modus Advanced Inc. will convert our extensive line of silicone and synthetic sheeting to your exact specifications.

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WesLastomer™ Sponge Materials - Custom Die Cut Gaskets

We use the highest quality sponge rubber to customize precisely what our customers want. Our WesLastomer™ silicone sponge and closed Neoprene blend sponge products are designed for a wide range of uses, including enclosure gaskets and door sealing applications. Our closed cell sponge materials are generally impermeable to water, making them a great choice for water sealing applications.

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A-A-59588 Class 3B Silicone Flex-Fatigue Resistant Die Cut Gaskets

A-A-59588 Class 3B Silicone. In some industries, strong flex-fatigue resistance is mission critical. That’s why flex testing is an essential tool for ensuring aerospace and military silicones can meet the A-A-59588 3B specification from the U.S. General Services Administration (GSA).

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WesLastomer™ Solid Materials - Custom Die Cut Gaskets Reference Guide

WesLastomer Number
Type of Rubber
Specification
Oil Resistance
Electrical Resistivity
Impact Resistance
Abrasion Resistance
Weather Resistance
Datasheet
WesLastomer Number: Grade 2100
Type of Rubber: Silicone
Specification: Commercial
Oil Resistance: Fair
Electrical Resistivity: Good
Impact Resistance: Fair
Abrasion Resistance: Poor
Weather Resistance: Excellent
WesLastomer Number: Grade 2200
Type of Rubber: Silicone
Specification: Translucent
Oil Resistance: Fair
Electrical Resistivity: Good
Impact Resistance: Fair
Abrasion Resistance: Poor
Weather Resistance: Excellent
WesLastomer Number: Grade 2300
Type of Rubber: Fluorosilicone
Specification: Performance
Oil Resistance: Good
Electrical Resistivity: Good
Impact Resistance: Fair
Abrasion Resistance: Poor
Weather Resistance: Excellent
WesLastomer Number: Grade 2400
Type of Rubber: Silicone
Specification: Performance
Oil Resistance: Fair
Electrical Resistivity: Good
Impact Resistance: Fair
Abrasion Resistance: Poor
Weather Resistance: Excellent
WesLastomer Number: Grade 2800
Type of Rubber: Fiberglass / Silicone
Specification: Performance
Oil Resistance: Fair
Electrical Resistivity: Good
Impact Resistance: Fair
Abrasion Resistance: Poor
Weather Resistance: Excellent
WesLastomer Number: Grade 3100
Type of Rubber: Neoprene
Specification: Commercial
Oil Resistance: Good
Electrical Resistivity: Very Good
Impact Resistance: Good
Abrasion Resistance: Excellent
Weather Resistance: Very Good
WesLastomer Number: Grade 3200
Type of Rubber: Buna-N / Nitrile
Specification: Commercial
Oil Resistance: Excellent
Electrical Resistivity: Poor
Impact Resistance: Good
Abrasion Resistance: Good
Weather Resistance: Poor
WesLastomer Number: Grade 3300
Type of Rubber: EPDM
Specification: Commercial
Oil Resistance: Poor
Electrical Resistivity: Excellent
Impact Resistance: Good
Abrasion Resistance: Good
Weather Resistance: Very Good
WesLastomer Number: Grade 3400
Type of Rubber: Fluoroelastomer
Specification: Performance
Oil Resistance: Excellent
Electrical Resistivity: Very Good
Impact Resistance: Good
Abrasion Resistance: Good
Weather Resistance: Very Good

WESLASTOMER™ SPONGE MATERIALS - CUSTOM DIE CUT GASKETS Reference Guide

WesLastomer Number
Type of Rubber
Density
Cell Structure
Temperature Range (F)
Impact Resistance
Abrasion Resistance
Weather Resistance
Datasheet
WesLastomer Number: Grade 4300
Type of Rubber: Silicone
Density: Soft
Cell Structure: Closed
Temperature Range (F): -103 to +450
Impact Resistance: Excellent
Abrasion Resistance: Poor
Weather Resistance: Excellent
WesLastomer Number: Grade 4400
Type of Rubber: Silicone
Density: Medium
Cell Structure: Closed
Temperature Range (F): -103 to +450
Impact Resistance: Excellent
Abrasion Resistance: Poor
Weather Resistance: Excellent
WesLastomer Number: Grade 4500
Type of Rubber: Silicone
Density: Firm
Cell Structure: Closed
Temperature Range (F): -103 to +450
Impact Resistance: Excellent
Abrasion Resistance: Poor
Weather Resistance: Excellent
WesLastomer Number: Grade 4600
Type of Rubber: Silicone
Density: Extra-Firm
Cell Structure: Closed
Temperature Range (F): -103 to +450
Impact Resistance: Excellent
Abrasion Resistance: Poor
Weather Resistance: Excellent
WesLastomer Number: Grade 4800
Type of Rubber: Neoprene Blend
Density: Soft
Cell Structure: Closed
Temperature Range (F): -40 to +250
Impact Resistance: Excellent
Abrasion Resistance: Poor
Weather Resistance: Fair
WesLastomer Number: Grade 4900
Type of Rubber: Neoprene Blend
Density: Medium
Cell Structure: Closed
Temperature Range (F): -40 to +250
Impact Resistance: Excellent
Abrasion Resistance: Poor
Weather Resistance: Fair
WesLastomer Number: Grade 5000
Type of Rubber: Neoprene Blend
Density: Medium-Firm
Cell Structure: Closed
Temperature Range (F): -40 to +250
Impact Resistance: Excellent
Abrasion Resistance: Poor
Weather Resistance: Fair
WesLastomer Number: Grade 5100
Type of Rubber: Neoprene Blend
Density: Firm
Cell Structure: Closed
Temperature Range (F): -40 to +250
Impact Resistance: Excellent
Abrasion Resistance: Poor
Weather Resistance: Fair
WesLastomer Number: Grade 5200
Type of Rubber: Neoprene Blend
Density: Extra-Firm
Cell Structure: Closed
Temperature Range (F): -40 to +250
Impact Resistance: Excellent
Abrasion Resistance: Poor
Weather Resistance: Fair

A-A-59588 CLASS 3B SILICONE FLEX-FATIGUE RESISTANT DIE CUT GASKETS Reference Guide

Compound Number
Thickness (inches)
Durometer
Low Temp Brittle Point @ -70 C
Specific Gravity
Tensile Strength (psi)
Elongation (%)
Tear B (ppi)
Flex Resistance (50,000 cycles/inch)
Datasheet
Compound Number: RX-230-6635
Thickness (inches): .020
Durometer: 50
Low Temp Brittle Point @ -70 C: Pass
Specific Gravity: 1.15
Tensile Strength (psi): 1280
Elongation (%): 660
Tear B (ppi): 240
Flex Resistance (50,000 cycles/inch): 0.42
Compound Number: RX-230-6636
Thickness (inches): .032
Durometer: 50
Low Temp Brittle Point @ -70 C: Pass
Specific Gravity: 1.15
Tensile Strength (psi): 1280
Elongation (%): 660
Tear B (ppi): 240
Flex Resistance (50,000 cycles/inch): 0.42
Compound Number: RX-230-6637
Thickness (inches): .062
Durometer: 50
Low Temp Brittle Point @ -70 C: Pass
Specific Gravity: 1.15
Tensile Strength (psi): 1280
Elongation (%): 660
Tear B (ppi): 240
Flex Resistance (50,000 cycles/inch): 0.42
Compound Number: RX-230-6638
Thickness (inches): .093
Durometer: 50
Low Temp Brittle Point @ -70 C: Pass
Specific Gravity: 1.15
Tensile Strength (psi): 1280
Elongation (%): 660
Tear B (ppi): 240
Flex Resistance (50,000 cycles/inch): 0.42
Compound Number: RX-230-6639
Thickness (inches): .125
Durometer: 50
Low Temp Brittle Point @ -70 C: Pass
Specific Gravity: 1.15
Tensile Strength (psi): 1280
Elongation (%): 660
Tear B (ppi): 240
Flex Resistance (50,000 cycles/inch): 0.42
Compound Number: RX-230-6640
Thickness (inches): .020
Durometer: 60
Low Temp Brittle Point @ -70 C: Pass
Specific Gravity: 1.19
Tensile Strength (psi): 1280
Elongation (%): 650
Tear B (ppi): 240
Flex Resistance (50,000 cycles/inch): 0.45
Compound Number: RX-230-6641
Thickness (inches): .032
Durometer: 60
Low Temp Brittle Point @ -70 C: Pass
Specific Gravity: 1.19
Tensile Strength (psi): 1280
Elongation (%): 650
Tear B (ppi): 240
Flex Resistance (50,000 cycles/inch): 0.45
Compound Number: RX-230-6642
Thickness (inches): .062
Durometer: 60
Low Temp Brittle Point @ -70 C: Pass
Specific Gravity: 1.19
Tensile Strength (psi): 1280
Elongation (%): 650
Tear B (ppi): 240
Flex Resistance (50,000 cycles/inch): 0.45
Compound Number: RX-230-6643
Thickness (inches): .093
Durometer: 60
Low Temp Brittle Point @ -70 C: Pass
Specific Gravity: 1.19
Tensile Strength (psi): 1280
Elongation (%): 650
Tear B (ppi): 240
Flex Resistance (50,000 cycles/inch): 0.45
Compound Number: RX-230-6644
Thickness (inches): .125
Durometer: 60
Low Temp Brittle Point @ -70 C: Pass
Specific Gravity: 1.19
Tensile Strength (psi): 1280
Elongation (%): 650
Tear B (ppi): 240
Flex Resistance (50,000 cycles/inch): 0.45

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