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Home » Product Info » Seals » Hallite Seals

HALLITE SEALS

Hallite Seals International are an ISO 9001 accredited manufacturer and provider of Hydraulic Seals and sealing solutions to the global fluid power industry.

They operate in all five continents of the world and work with a number of major international brands. Hallite is renowned for their commitment to engineering excellence.

For over 100 years Hallite Seals International has been at the cutting edge of fluid power technology. They manufacture a wide range of rod piston static seas and bearing components. Hallite Seals International is at the forefront of technically challenging applications, from a wide range of materials which include Polytetrafluoroethylene PTFE Polyurethane AU nitrile rubbers NBR and Fluoroelastomers FKM. Seal & Design is proud to be a full line distributor.

The following information is provided to assist customers when selecting a Hallite seal for their application. If you need assistance choosing a Hallite product for your application feel free to contact us for assistance.

General Usage Guidelines
Hallite Material Guide
Fluid Compatibility
Operating Conditions
Storage Guidelines

HOUSING & INSTALLATION DATA

Hallite 87 & 506 Bearing Strip

Hallite 87 strip is a low friction PTFE & Bronze compound produced in a flat tape style ready for easy cutting to size to suit individual applications and is particularly effective in friction conscious applications such as servo cylinders.

Hallite 506 can be supplied in spiral lengths, generally in 10 meter, as individual cut bearings and also in 10 meter lengths packed flat in a box dispenser. Hallite 506 bearing strip is manufactured to extremely accurate thickness tolerances, ensuring reliable cylinder alignment. Other sizes of type 506 are available on request, special sections and diameters can also be produced to suit individual requirements.

Bearing Type		Standard Material
87		PTFE + Bronze
506		Polyester + PTFE

Bearing Strip Housing Tolerances

As tolerances are not specified “on line” for Hallite Types 87 & 506, please refer to the information below for tolerances:

Hallite 506 Specified Tolerances (mm)
Bearing Length L₁		Bearing Cross Section S
-0.1 to -0.6		-0.02 to -0.1

Hallite 506 Specified Tolerances (in)
Bearing Length L₁		Bearing Cross Section S
-0.005 to -0.015		-0.001 to -0.004

HALLITE 87 & 506 SPECIFIED TOLERANCES

Nominal Dimension Range (mm)		Tolerances (Units: 0.001 mm)				Nominal Dimension Range (in)		Tolerances (Units: 0.001 in)
over	to	f9	H9	H10	H11	over	to	f9	H9	H10	H11
10	18	-16 -59	+43 0	+70 0	+110 0	.40	.71	-.06 -2.3	+1.6 0	+2.8 0	+4.0 0
18	30	-20 -72	+52 0	+84 0	+130 0	.71	1.19	-0.8 -2.8	+2.0 0	+3.5 0	+5.0 0
30	50	-25 -87	+62 0	+100 0	+160 0	1.19	1.97	-1.0 -3.4	+2.5 0	+4.0 0	+6.0 0
50	80	-30 -104	+74 0	+120 0	+190 0	1.97	3.15	-1.2 -4.1	+3.0 0	+4.5 0	+7.0 0
80	120	-36 -123	+87 0	+140 0	+220 0	3.15	4.73	-1.4 -4.8	+3.5 0	+5.0 0	+9.0 0
120	180	-43 -143	+100 0	+160 0	+250 0	4.73	7.09	-1.6 -5.6	+4.0 0	+6.0 0	+10.0 0
180	250	-50 -165	+115 0	+185 0	+290 0	7.09	9.85	-2.0 -6.5	+4.5 0	+7.0 0	+12.0 0
250	315	-56 -186	+130 0	+210 0	+320	9.85	12.41	-2.2 -7.3	+5.0 0	+8.0 0	+12.0 0
315	400	-62 -212	+140 0	+230 0	+360 0	12.41	15.75	-2.5 -8.3	+6.0 0	+9.0 0	+14.0 0
400	500	-68 -223	+155 0	+250 0	+400 0	15.75	19.69	-2.8 -8.8	+6.0 0	+10.0 0	+16.0 0
500	630	-76 -251	+175 0	+280 0	+440 0	19.69	24.80	-3.0 -9.9	+6.9 0	-11.0 0	+17.3 0
630	800	-80 -280	+200 0	+320 0	+500 0	24.80	31.49	-3.1 -11.0	+7.9 0	+12.6 0	+19.7 0
800	1000	-86 -316	+230 0	+360 0	+560 0	31.49	39.37	-3.4 -12.4	+9.1 0	-14.2 0	+22.0 0

HALLITE 87 & 506 SHAFTS & BORES - METRIC

Nominal Dimension Range (mm)		Shafts- Outside Diameter (Units: 0.001 mm)									Bores- Outside Diameter (Units: 0.001 mm)
over	to	f8	f9	h8	h9	h10	h11	js10	js11	H8	H9	H10	H11	Js11
1.6	3	-6 -20	-6 -31	0 -14	0 -25	0 -40	0 -60	+20 -20	+30 -30	+14 0	+25 0	+40 0	+60 0	+30 -30
3	6	-10 -28	-10 -40	0 -18	0 -30	0 -48	0 -75	+24 -24	+37.5 -37.5	+18 0	+30 0	+48 0	+75 0	+37.5 -37.5
6	10	-13 -35	-13 -49	0 -22	0 -36	0 -58	0 -90	+29 -29	+45 -45	+22 0	+36 0	+58 0	+90 0	+45 -45
10	18	-16 -43	-16 -59	0 -27	0 -43	0 -70	0 -110	+35 -35	+55 -55	+27 0	+43 0	+70 0	+110 0	+55 -55
18	30	-20 -53	-20 -72	0 -33	0 -52	0 -84	0 -130	+42 -42	+65 -65	+33 0	+52 0	+84 0	+130 0	+65 -65
30	50	-25 -64	-25 -87	0 -39	0 -62	0 -100	0 -160	+50 -50	+80 -80	+39 0	+62 0	+100 0	+160 0	+80 -80
50	80	-30 -76	-30 -104	0 -46	0 -74	0 -120	0 -190	+60 -60	+95 -95	+46 0	+74 0	+120 0	+190 0	+95 -95
80	120	-36 -90	-36 -123	0 -54	0 -87	0 -140	0 -220	+70 -70	+110 -110	+54 0	+87 0	+140 0	+220 0	+110 -110
120	180	-43 -106	-43 -143	0 -63	0 -100	0 -160	0 -250	+80 -80	+125 -125	+63 0	+100 0	+160 0	+250 0	+125 -125
180	250	-50 -122	-50 -165	0 -72	0 -115	0 -185	0 -290	+92 -92	+145 -145	+72 0	+115 0	+185 0	+290 0	+145 -145
250	315	-56 -137	-56 -186	0 -81	0 -130	0 -210	0 -320	+105 -105	+160 -160	+81 0	+130 0	+210 0	+320 0	+160 -160
315	400	-62 -151	-62 -202	0 -89	0 -140	0 -230	0 -360	+115 -115	+180 -180	+89 0	+140 0	+230 0	+360 0	+180 -180
400	500	-68 -165	-68 -223	0 -97	0 -155	0 -250	0 -400	+125 -125	+200 -200	+97 0	+155 0	+250 0	+400 0	+200 -200
500	630	-76 -186	-76 -251	0 -110	0 -175	0 -280	0 -440	+140 -140	+220 -220	+110 0	+175 0	+280 0	+440 0	+220 -220
630	800	-80 -205	-80 -280	0 -125	0 -200	0 -320	0 -500	+160 -160		+125 0	+200 0	+320 0	+500 0

HALLITE 87 & 506 SHAFTS & BORES - INCH

Nominal Dimension Range (in)		Shafts- Outside Diameter (Units: 0.001 in)									Bores- Outside Diameter (Units: 0.001 in)
over	to	f8	f9	h8	h9	h10	h11	js10	js11	H8	H9	H10	H11	Js11
0.04	0.12	-0.3 -0.9	-0.3 -1.2	0 -0.6	0 -1.0	0 -1.6	0 -2.5	+0.8 -0.8	+1.3 -1.3	+0.6 0	+1.0 0	+1.6 0	+2.5 0	+1.3 -1.3
0.12	0.24	-0.4 -1.1	-0.4 -1.6	0 -0.7	0 -1.2	0 -1.8	0 -3.0	+0.9 -0.9	+1.5 -1.5	+0.7 0	+1.2 0	+1.8 0	+3.0 0	+1.5 -1.5
0.24	0.40	-0.5 -1.4	-0.5 -1.9	0 -0.9	0 -1.4	0 -2.2	0 -3.5	+1.1 -1.1	+1.8 -1.8	+0.9 0	+1.4 0	+2.2 0	+3.5 0	+1.8 -1.8
0.40	0.71	-0.6 -1.6	-0.6 -2.3	0 -1.0	0 -1.6	0 -2.8	0 -4.0	+1.4 -1.4	+2.0 -2.0	+1.0 0	+1.6 0	+2.8 0	+4.0 0	+2.0 -2.0
0.71	1.19	-0.8 -2.0	-0.8 -2.8	0 -1.2	0 -2.0	0 -3.5	0 -5.0	+1.8 -1.8	+2.5 -2.5	+1.2 0	+2.0 0	+3.5 0	+5.0 0	+2.5 -2.5
1.19	1.97	-1.0 -2.6	-1.0 -3.4	0 -1.6	0 -2.5	0 -4.0	0 -6.0	+2.0 -2.0	+3.0 -3.0	+1.6 0	+2.5 0	+4.0 0	+6.0 0	+3.0 -3.0
1.97	3.15	-1.2 -3.0	-1.2 -4.1	0 -1.8	0 -3.0	0 -4.5	0 -7.0	+2.3 -2.3	+3.5 -3.5	+1.8 0	+3.0 0	+4.5 0	+7.0 0	+3.5 -3.5
3.15	4.73	-1.4 -3.6	-1.4 -4.8	0 -2.2	0 -3.5	0 -5.0	0 -9.0	+2.5 -2.5	+4.5 -4.5	+2.2 0	+3.5 0	+5.0 0	+9.0 0	+4.5 -4.5
4.73	7.09	-1.6 -4.1	-1.6 -5.6	0 -2.5	0 -4.0	0 -6.0	0 -10.0	+3.0 -3.0	+5.0 -5.0	+2.5 0	+4.0 0	+6.0 0	+10.0 0	+5.0 -5.0
7.09	9.85	-2.0 -4.8	-2.0 -6.5	0 -2.8	0 -4.5	0 -7.0	0 -12.0	+3.5 -3.5	+6.0 -6.0	+2.8 0	+4.5 0	+7.0 0	+12.0 0	+6.0 -6.0
9.85	12.41	-2.2 -5.2	-2.2 -7.3	0 -3.0	0 -5	0 -8.0	0 -12.0	+4.0 -4.0	+6.0 -6.0	+3.0 0	+5.0 0	+8.0 0	+12.0 0	+6.0 -6.0
12.41	15.75	-2.5 -6.0	-2.5 -8.0	0 -3.5	0 -6.0	0 -9.0	0 -14.0	+4.5 -4.5	+7.0 -7.0	+3.5 0	+6.0 0	+9.0 0	+14.0 0	+7.0 -7.0
15.75	19.69	-2.8 -6.5	-2.8 -8.8	0 -4.0	0 -6.0	0 -10.0	0 -16.0	+5.0 -5.0	+8.0 -8.0	+4.0 0	+6.0 0	+10.0 0	+16.0 0	+8.0 -8.0
19.69	24.80	-3.0 -7.0	-3.0 -9.9	0 -4.3	0 -6.9	0 -11.0	0 -17.3	+5.5 -5.5	+8.7 -8.7	+4.3 0	+6.9 0	+11.0 0	+17.3 0	+8.7 -8.7
24.80	31.49	-3.1 -8.1	-3.1 -11.0	0 -4.9	0 -7.9	0 -12.6	0 -19.7	+6.3 -6.3	+9.8 -9.8	+4.9 0	+7.9 0	+12.6 0	+19.7 0	+9.8 -9.8

HOUSING DESIGN

Hallite Seals’ product data sheets give information indicating the allowable extrusion gap a seal can see at pressure during its working life. The extrusion gap can be calculated using the tolerance build ups within the cylinder and any dilation that may occur under pressure. Maximum extrusion gap = F max (see drawing below). F max is the maximum extrusion gap for the seal Minimum metal to metal clearance = F min (see drawing below). F min for cylinders with minimal side loading should be > 0.1mm (0.004”).

Rods

Note: Rod is not concentric with gland, because of clearances.
(shown exaggerated)

Note: Piston is not concentric with cylinder bore, because of clearances.
(shown exaggerated)

Pistons

Calculate both F max and F min.
Ensure the F min is greater than 0.1mm (0.004”) and F max is less than the maximum extrusion gap stated on the seal data sheet at the application’s working pressure.

For built-in metal bearings, the extrusion gap calculation is simpler.

For F max:
Rod = ØD₃ max – Ød₁ min + dilation
Piston = ØD₁max – Ød₃ min + dilation

F min must be zero

Extrusion is closely linked to pressure and temperature. In general, the best seal performance and life is provided by specifying the smallest possible extrusion gap. The figures shown for the extrusion gap within the operating conditions of Hallite’s product data sheets, relate to the maximum permissible, worst case situation with the gap all on one side.

HOUSING DESIGN & SEAL OPTIONS

The following diagrams illustrate how Hallite’s wide range of products can be applied to a selection
of some of the most popular cylinder designs servicing the world’s fluid power industry.

The diagrams show different gland and piston arrangements to illustrate alternative sealing methods
currently in use and a suitable Hallite product.

If the application which you are interested in is of a non-standard nature please contact Hallite’s
technical department.

GENERAL RECOMMENDATIONS

We have found from many years experience, that premature seal failure can be avoided if the following recommendations are considered at the design and manufacturing stage of the cylinder:

Specify piston and gland bearings which are adequately proportioned to support the cylinder loads. As a result of mounting misalignment and / or the working action of the cylinder, piston and gland bearings will be subjected to side-loading, causing damage to the rod or the tube surface and hence the seal, if the bearings are inadequate.
Ensure that seals are stored distortion-free in a cool, dry and dark place prior to fitting.
Check that the seal housing is free from damage likely to harm the seal. Remove all sharp edges and burrs from metal parts, paying particular attention to ports, grooves and threads over or through which the seal passes during assembly.
Clean all seal housing areas, ensuring that all metallic particles and other contaminants have been removed. Check that other surfaces adjacent to the passage of the seal on fitting are also free of dirt, swarf or other contaminants. Check that both static and dynamic housing surface finishes meet specifications.
Where the difference between a thread diameter over which the seal must pass and the seal diameter is small, use some form of protection over the thread, such as a fitting sleeve made of hard plastic.
Check that the seal is of the correct type, part number and size, and that the specified material is correct. If there is any doubt regarding the material contact your local Hallite sales office.
Lubricate all seals and metal components liberally with clean operating fluid or a compatible grease prior to assembly. N.B. Silicone grease should not be used in normal hydraulic applications.
Where seals fitted to sub-assemblies, such as pistons, are awaiting further fitting operations, ensure that the seals are not subjected to any misaligned or localized loading which will cause local deformation. Ensure that sub-assemblies remain clean.
The use of metal levers is not recommended but should they be used it is imperative that they are completely smooth and free from nicks and burrs. When using them ensure that the metal surfaces adjacent to the seal are not damaged.
Flush the hydraulic system thoroughly before connecting the cylinder to it.

HALLITE FLUID COMPATIBILITY

Fluids based on mineral oils			Greases		Fuels
Material	Continuous material service temp. range °C	Intermittent material service temp. range °C	Motor Oils	Hypoid gear oils	Automatic trans. fluid	ISO 6743-4 Hydraulic oils (HL, HM, HV)	Mineral oil based greases	Silicon based greases	Diesel fuel	Fuel for gasoline, petrol engines – normal	Fuel for gasoline, petrol engines – super
Material	Continuous material service temp. range °C	Intermittent material service temp. range °C	+150 -40	+150 -40	+160 -50	+100 -30	+100 -30	+250 -50	Diesel fuel	Fuel for gasoline, petrol engines – normal	Fuel for gasoline, petrol engines – super
NBR 70 IRHD NBR 90 IRHD Nitrile (medium)	+ 100 – 30	+ 100 – 30	100	90	100	100	100	100	*	*	*
FKM 75 IRHD FKM 90 IRHD Fluoro-elastomer	+ 200 – 20	+ 250 – 20	150	150	160	100	100	200	150	150	150
EPDM 70 IRHD EPDM 80 IRHD	+ 120 – 50	+ 150 – 50	NS	NS	NS	NS	NS	NS	NS	NS	NS
VMQ 70 IRHD Silicone	+ 200 – 55	+ 250 – 55	*	*	*	*	100	*	NS	NS	NS
HNBR 75 IRHD Hydrogenated nitrile	+ 200 – 55	+ 150 – 30	130	110	130	100	100	130	*	*	*
IIR Butyl	+ 120 – 40	+ 140 – 40	NS	NS	NS	NS	NS	120	NS	NS	NS
FFKM Perfluoroelastomer	+300 +200 +40 -20		150	150	160	100	100	200	150	150	150
AU Polyester PU	+ 100 – 30	+ 110 – 30	100	100	100	100	100	100	60	60	60
EU Polyether PU	+ 100 – 40	+ 110 – 45	100	100	100	100	100	100	60	60	60
Polyester elastomer	+ 100 – 40	+ 120 – 40	100	100	100	100	100	100	60	60	60
PA Polyamide	+ 100 – 40	+ 120 – 40	100	100	100	100	100	100	100	100	100
POM Acetal	+ 100 – 45	+ 120 – 45	100	100	100	100	100	100	100	100	100
PPS Polyphenylene sulphide	+ 200 – 40	+ 200 – 40	150	150	160	100	100	200	150	150	150
PTFE Polytetrafluoroethylene	+ 200 – 200	+ 200 – 200	150	150	160	100	100	200	150	150	150
Thermosetting polyester resin	+ 100 – 50	+ 130 – 200	100	100	100	100	100	100	100	100	100
PEEK Polyetheretherketone	+ 250 – 65	+ 300 – 65	150	150	160	100	100	250	150	150	150
* Denotes that values vary greatly for individual elastomers within this group NS Denotes that the elastomer is not suitable. The work of the BFPA technical working group ‘TC16/WG8’ in the compilation of this table is acknowledged.

HALLITE MATERIAL GUIDE

Material Name	Material Group	Designation	Temperature °C	Temperature °F	Hardness	Color	Rod	Piston	Wiper	Bearing
Nitrile - medium	Synthetic rubber	NBR	-30 +120	-22 +250	93 IRHD	Black	H
Nitrile - medium	Synthetic rubber	NBR	-30 +120	-22 +250	90 IRHD	Black			H
Nitrile - high	Synthetic rubber	NBR	-10 +140	-14 +284	80 IRHD	Black	P	P	P
Nitrile - low	Synthetic rubber	NBR	-45 +100 -	-45 +212	80 IRHD	Black		H
Nitrile - medium	Synthetic rubber	NBR	-30 +120	-22 +250	78 IRHD	Black		H			M¹
Nitrile - medium	Synthetic rubber	NBR	-30 +120	-22 +250	75 IRHD Black	Black	H	H
Nitrile - medium	Synthetic rubber	NBR	-30 +120	-22 +250	73 IRHD Black	Black	H	H
Nitrile - medium	Synthetic rubber	NBR	-30 +120	-22 +250	70 IRHD	Black	H	H
Nitrile - low	Synthetic rubber	NBR	-45 +100	-45 +212	70 IRHD	Black	H	H
Nitrile - medium 407	Synthetic rubber	NBR	-30 +120	-22 +250	70 IRHD	Black		H
Nitrile - low 407 LT	Synthetic rubber	NBR	-56 +100	-70 +212	70 IRHD	Black		H
Nitrile - medium	Synthetic rubber	NBR	-30 +120	-22 +250	65 IRHD	Black		H
Hallprene -rubber/fabric	Composite	Cotton/NBR	-30 +120	-22 +250		Black	H	H
Fluoroelastomer - rubber/fabric	Composite	Cotton/FKM	-20 +150	-4 +302		Black	H	H
Fluoroelastomer	Synthetic rubber	FKM	-20 +200	-4 +392	75 IRHD	Black	HP	HP	HP
Hythane 181	TPE	EU	-45 +110	-50 +230	93 IRHD	Blue	HP	HP	HP
Hythane 282	TPE		-30 +125	-22 +255	93 IRHD	Purple	HP	HP	HP		M
Polyurethane	TPE	AU	-40 +100	-40 +212	94 IRHD	Dark Blue	H	H	H
Polyurethane	TPE	AU	-30 +100	-22 +212	93 IRHD	Dark Blue			H
Standard polyester elastomer	TPE		-40 +120	-40 +250	55 D	Red		H	H
Hydrolysis stabilised polyester elastomer	TPE		-40 +120	-40 +250	55 D	Grey	H	H			M
Hydrolysis stabilised polyester elastomer	TPE		-40 +140	-40 +284	72 D	Red		H			M
Lubricated stabilised polyester elastomer	TPE		-40 +120	-40 +250	55 D	Dark Brown		HP
Acetal	Eng. plastic	POM	-45 +120	-50 +250	R 115	Orange	H	H		HP	M
PTFE glass filled	Eng. plastic	PFTE	-50 +200	-58 +392	60 D	White	HP	HP
PTFE Glass / MoS2 filled	Eng. plastic	PFTE	-50 +200	-58 +392	62 D	Grey	H	H		H
PTFE Bronze filled	Eng. plastic	PFTE	-50 +200	-58 +392	72 D	Bronze	HP	HP		HP
Hallite 506 polyester / polyester	Eng. plastic		-40 +120	-40 +250		Red				HP	M
Nylon 12	Composite	PA	-40 +120	-40 +250	72 D	Brown		H
Nylon 6 / MoS2	Eng. plastic	PA	-40 +120	-40 +250	R 115	Black	H	H
Glass filled Nylon	Eng. plastic	PA	-40 +120	-40 +250	R 124	Black	H	H		H
¹ Static applications only							H - Hydraulic, P - Pneumatic M - Suitable for water based fluids

HALLITE SEALS - Storage Guidelines

Most polymeric items including vulcanized rubber and other elastomers tend to change their properties during storage and may become unserviceable. This may be due to hardening, softening, cracking, crazing or other degradation and may be the result of oxygen, ozone, light, heat and/or humidity. Use the the following informational chart for most suitable conditions for storing elastomeric items, whether as a single item or composite product.

ENVIRONMENTAL FACTORS

Factor

Recommendations

Temperature

Storage temperatures should not exceed 75°F. Low temperatures are not permanently harmful provided the rubber items are handled carefully and not distorted. When taken from low temperatures items should be raised to approximately 85°F before they are used.

Humidity

Optimum humidity is about 65% in a draft-free atmosphere.

Light

Protection from direct sunlight and strong artificial light with a high ultraviolet content is important. Unless packed in opaque containers, it is advisable to cover windows with red or orange screens or coatings.

Oxygen and Ozone

Elastomeric items should be protected from circulating air wherever possible. As ozone is particularly harmful to rubber, storage rooms should be free from equipment that may give rise to electric sparks or discharge. Wrapping, storage in airtight containers or other suitable means should be used for vulcanised rubber items.

Deformation

Where possible, rubber items should be stored in a relaxed position, free from tension or compression. Laying the item flat and avoiding suspension or crushing keeps it free from strain and minimizes deformation.

Contact with Liquid and Semi-Solid Material

Contact with liquids and semi-solid materials, particularly solvents, such as oils or greases should be avoided unless so packed by the manufacturer.

Contact with Metals

Metals such as manganese, iron and copper, or copper alloys can have a harmful effect on rubber. A layer of paper, polyethylene or cellophane will keep these separated.

Contact with Non-Metals

Contact with other rubbers or creosotes should be avoided.

Stock Rotation

Elastomers should be stored for as short a period as possible, and strict stock rotation should be practiced

Please note, this chart is not available for mobile browsers. To view our full chart, please visit our desktop website.

Rogers’ PORON

More Info >

Spring Energized Seals

More Info >

Silicone Engineering

More Info >

COVID-19 Shields

More Info >

Fluid Compatibility Page

Learn More >

O-Ring Groove Design

Learn More >

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HALLITE SEALS

HOUSING & INSTALLATION DATA

HALLITE 87 & 506 SPECIFIED TOLERANCES

HALLITE 87 & 506 SHAFTS & BORES - METRIC

HALLITE 87 & 506 SHAFTS & BORES - INCH

HOUSING DESIGN

HOUSING DESIGN & SEAL OPTIONS

GENERAL RECOMMENDATIONS

HALLITE FLUID COMPATIBILITY

HALLITE MATERIAL GUIDE

HALLITE SEALS - Storage Guidelines

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