Pre-coating is an innovative and economical technique that advantageously replaces many sealing systems such as flat seals, O-rings, sealing pastes, anaerobic resins and Teflon strips.
Our special machinery allows us to produce small series (1000 pieces) as well as large series (1 million pieces) on a very wide range of applications.
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Seal under the heads
of screws & crimpeparts
Sealing of threads
on all types of parts
Sealing of tubes and
with locking function
The sealing function is often both complex and costly to obtain in mechanical assemblies. The pre-coating of fasteners makes it possible to ensure a completely reliable, easy-to-use seal with no installation costs.
The product we apply to your parts is dry, non-sticky and completely localized.
During assembly, whether by screwing, press fitting or crimping, the resin fills in the gaps in the assembly to ensure an immediate seal.
A variety of fluids can be sealed using the pre-coating technique:
Compressed air and gas
Oils and hydrocarbons
Cooling liquids and brake liquid
Water for spraying or immersion
Elimination of costs for workshop or construction site assembly
Replaces O-rings or flat seals as well as difficult-toapply
pastes and liquid resins.
Perfect seal: 100% leak-free seal with no «background noise»
Unfailing quality: the sealing system is guaranteed and visible
Immediate sealing after assembly, up to 50 bars for certain assemblies.
High admissible pressures
Sealing level of up to IP67
Control of technical parameters
High resistance to chemicals
Works on all types of metal as well as on plastic parts
Pre-coated parts can be used for a variety of applications including electronics, automobiles, motorcycles, household appliances, electric motors…
A more effective substitute for flat seals and O-rings
Prevents loss of clamping force due to vibration
Simplified industrialization in air, water or oil circuits
Good heat and chemical resistance
#3 / SEALING OF TUBES AND SOCKETED PARTS
Soprima has developed special expertise in the pre-coating of socketed parts.
Our pre-coating technique for tubes, axles and other smooth parts offers superior technical performance and substantial savings in a variety of sectors
Pump outlet cannula and rigid pipes
Press-fitted socketed smooth nozzles
Grit removal plugs
This type of sealing is primarily used in the automotive sector to seal many engine components.
Robust sealing for automobile fluid circuits
0 ppm application quality on large series
Replaces Banjo-type threaded connections
Effective on aluminium, steel or stainless steel bar-turned tubing or seamless drawn tubing
Replaces in-line bonded grit removal caps
#4 / SEALING COMBINED WITH LOCKING FUNCTION
Fasteners to be sealed can also be secured to prevent loosening by adding a locking product to the threading: a micro-encapsulated adhesive such as threadlock or polyamide resin for repositionable parts.
Under some conditions (fluid, pressure, assembly design), locking products can also provide the sealing function on the threading.
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