Compound Identification

Expert Identification for Consistent Quality

Accurate identification of materials and formulations is critical at every stage.

At GB Gummi LLP, every compound undergoes a series of precise evaluations to ensure that your materials meet the highest standards of performance and consistency. Leveraging cutting-edge tools and industry expertise, we leave no element unexamined.

Key Techniques We Employ

Our methods work in harmony, providing you with a comprehensive understanding of your material’s composition.
Whether it’s for quality assurance or R&D, we guarantee reliable, detailed insights into your rubber compounds.

We Deliver Custom Rubber Compounds for Every Need

CIIR

GB GUMMI Ref:	GBK
ASTM Classification:	CIIR
FULL FORM OF RM/Rubber	Derivative of butyl rubber which has been reacted with chlorine in a continuous process
Benefits	Low gas permeability Excellent ozone resistance Good steam resistance Good fire resistance.
Limitations	Poor resistance to oils and non-polar solvents .
Service Temperature °C	-50 to 120°C
Applications / Products	Inner tyre tubes, breathing apparatus for defence and fire services, Dampers.

HNBR

GB GUMMI Ref:	GBH
ASTM Classification:	HNBR
FULL FORM OF RM/Rubber	Hydrogenated (≥ 90% saturation) version of acrylonitrile-butadiene rubber, which shows improved stability and physical properties compared to standard NBR
Benefits	Good resistance to oils and non-polar solvents High tensile strength Good ozone and weathering resistance Good abrasion resistance Excellent heat resistance.
Limitations	Decreased low temperature flexibility compared to NBR Poor steam resistance.
Service Temperature °C	-25 to 170°C
Applications / Products	Oil & gas industry.

FVMQ

GB GUMMI Ref:	GBV
ASTM Classification:	FVMQ
FULL FORM OF RM/Rubber	Copolymer of fluorovinyl and methyl siloxane
Benefits	Excellent resistance to high and low temperatures Excellent ozone resistance Excellent compression set resistance Good resistance to oils and most non-polar solvents.
Limitations	Poor tensile strength and abrasion resistance.
Service Temperature °C	-60 to 200°C
Applications / Products	Food and medical applications, aircraft fuel systems.

VMQ

GB GUMMI Ref:	GBV
ASTM Classification:	VMQ
FULL FORM OF RM/Rubber	Polydimethylsiloxane containing vinyl (VMQ)
Benefits	Excellent resistance to high and low temperatures.
Limitations	Poor tensile strength Poor resistance to oils and non-polar solvents.
Service Temperature °C	-60 to 225°C
Applications / Products	Food and medical applications.

ECO

GB GUMMI Ref:	GBD
ASTM Classification:	ECO
FULL FORM OF RM/Rubber	Polymers based on polyepichlorohydrin which may also contain ethylene oxide and allyl glycidyl ether
Benefits	Excellent ozone resistance Good resistance to oils .Fire resistance.
Limitations	Poor resistance to some non-polar solvents Poor steam resistance.
Service Temperature °C	-35 to 125°C
Applications / Products	Seals, gaskets, diaphragms, cable jackets and belting.

AEM

GB GUMMI Ref:
ASTM Classification:	AEM
FULL FORM OF RM/Rubber	Copolymer of ethylene and acrylate
Benefits	Excellent resistance to transmission fluids, water, glycol mixtures and weak bases Good dynamic properties over a wide temperature range Excellent vibration dampening Excellent ozone resistance Can be formulated for low flammability / low smoke specifications.
Limitations	Poor steam resistance Poor resistance to brake fluid and phosphate esters.
Service Temperature °C	-40 to 175°C
Applications / Products	Automotive sealing applications, including seals for transmission and power steering systems.

GB GUMMI Ref:	GBC
ASTM Classification:	CR
FULL FORM OF RM/Rubber	Polychloroprene rubber
Benefits	High tensile strength and resilience Excellent ozone and weathering resistance Good resistance to oils.
Limitations	Poor resistance to some non-polar solvents Poor steam resistance.
Service Temperature °C	-40 to 125°C
Applications / Products	General purpose seals and hoses; seals for refrigeration industry applications.

NBR-PVC

GB GUMMI Ref:	GBP
ASTM Classification:	NBR PVC
FULL FORM OF RM/Rubber	Blend of polyvinyl chloride and acrylonitrile butadiene rubber.
Benefits	Good resistance to oils. Improved ozone resistance compared to NBR.
Limitations	Poor weathering resistance. Poor steam resistance.
Service Temperature °C	-40 to 100°C
Applications / Products	Oil resistant seals that may be exposed to daylight or other forms of radiation.

ACM

GB GUMMI Ref:	GBA
ASTM Classification:	ACM
FULL FORM OF RM/Rubber	Copolymer of ethyl and butyl acrylate
Benefits	Excellent resistance to petroleum fuel and oil Good heat resistance Good ozone resistance Resists flex cracking.
Limitations	Moderate water resistance.
Service Temperature °C	-60 to 175°C
Applications / Products	Automotive sealing applications, including seals for transmission and power steering systems.

EPDM

GB GUMMI Ref:	GBE
ASTM Classification:	EPDM
FULL FORM OF RM/Rubber	Terpolymer of ethylene, propylene and a diene cure site monomer (EPDM)
Benefits	Excellent steam resistance. Excellent ozone and weathering resistance Good low temperature flexibility.
Limitations	Poor resistance to oils and non-polar solvents.
Service Temperature °C	-55 to 150°C
Applications / Products	O-rings, seals and components for potable water seals, taps etc, brake systems, automotive cooling systems, nuclear cooling systems, outdoor exposure applications.

FKM

GB GUMMI Ref:	GBF
ASTM Classification:	FKM
FULL FORM OF RM/Rubber	fluorocarbon copolymers based on vinylidene fluoride and hexapropylene fluoride
Benefits	Excellent high temperature resistance Good resistance to oils and most non-polar solvents Excellent ozone and weathering resistance.
Limitations	Limited steam resistance Poor resistance to methanol. Poor low temperature performance.
Service Temperature °C	-20 to 240°C
Applications / Products	General purpose seals for aerospace fuel and automotive applications.

NBR

GB GUMMI Ref:	GBB
ASTM Classification:	NBR
FULL FORM OF RM/Rubber	Nitrile Butadiene Rubber
Benefits	Good resistance to oils and non-polar solvents.
Limitations	Poor ozone and weathering resistance. Poor steam resistance.
Service Temperature °C	-40 to 120°C
Applications / Products	Oil resistant applications in automotive, marine and aircraft fuel systems.

SBR

GB GUMMI Ref:	GBS
ASTM Classification:	SBR
FULL FORM OF RM/Rubber	Styrene Butadiene Rubber
Benefits	Good Tensile Properties, Good brake oil resistance.
Limitations	Poor resistance to oils and non-polar solvents, Poor steam resistance, Poor ozone and weathering resistance.
Service Temperature °C	-25 to 100°C
Applications / Products	Damper, Isolator Mount, NR+SBR Blend parts, Brake seals.

GB GUMMI Ref:	GBN
ASTM Classification:	NR
FULL FORM OF RM/Rubber	Natural Rubber
Benefits	High Tensile Properties, Better Abrasion resistance, Good Resilience properties
Limitations	Poor resistance to oils and fuels, inferior weather resistance.
Service Temperature °C	-30 to 60°C
Applications / Products	Suspension Mounts, Damper, Bushing, Bump Stop, Diaphragm, Isolator Mount, Food Grade Seals, V BELTS, etc.

Compound Identification

Expert Identification for Consistent Quality

Key Techniques We Employ

Thermo-gravimetric Analysis (TGA)

Differential scanning calorimetry (DSC)

We Deliver Custom Rubber Compounds for Every Need