GBT Cover Specifications

GBT Quality
RMA Quality
DIN Quality
ISO Quality
Temperature (°F)
Basic Materials
Application Technical Characteristics
min.
surf.
mat
N.A.
RMA 3
Z
L
-20
165
190
SBR
General purpose light conditions
Grade 2
RMA 2
Y
-30
175
212
NR/SBR
High abrasion resistant for normal service conditions
HARC
W
D
-40
175
190
NR/SBR
Super abrasion resistant for heavy service conditions for abrasive materials with a large proportion of fines
Grade 1
RMA 1
X
H
-40
175
190
NR
Extra abrasion & cut resistant for heavy duty service conditions with sharp materials and adverse loading conditions
HM 250
T
-25
250
300
SBR
Heat resistant for materials at moderate temperatures
HM 400
T
-25
400
300
SBR/IR
Higher heat resistance for materials with controlled high temperaturs
HM 750
T
-25
750
400
EPDM
Very heat resistant for heavy duty service conditions excluding abrasive materials up to 750°F
MOR/SC
G
-20
175
200
SBR/NBR
Oil and fat resistant for terpenes, vegetable and animal oils - medium service conditions
SOR
G
-20
175
200
SBR/NBR
Oil resistant for vegetable oils and animal fats and/or heavy service conditions
OHR
G
-20
250
350
NBR
Oil and heat resistant for oily materials (mineral oil base)
FR-SBR
K
-20
175
200
SBR
Fire resistant for coal
FR-HA
K
-30
175
200
NR/SBR
Fire resistant for coal, high abrasion
FR-OR-SC
K
-20
175
200
SBR/NBR
Same characteristics as MOR/SC and also fire resistant
FR-SOR-SC
K
-20
175
200
SBR/NBR
Same characteristics as SOR and also fire resistant
Basic Materials Legend:
NR = Natural Rubber
NBR = Nitrile Rubber
EPDM = Ethylene-Propylene-Diene Rubber
SBR = Styrene-Butadiene Rubber
IR = Butyl Rubber
CR = Chloroprene Rubber (Neoprene)
Our Compound Specification Sheet is available in PDF format here.

NIBA logo