14 Products
HYLOMAR
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Hylomar: understand the range before choosing
Hylomar manufactures several chemically and functionally distinct sealing families. The AutoMotoPart range includes non-setting Universal Blue, semi-hardening Hylotyte Red 100, curing Hylosil 102 and Instant Gasket silicones, anaerobic Nut Lock, Stud Lock, Thread Sealant and Retainer products, plus separate heat-curing exhaust paste and putty. Selection must follow the exact joint, materials, fluids, gap, temperature and service procedure.
AutoMotoPart currently lists 14 Hylomar items. The largest Hylomar groups are 14 maintenance entries. Hylomar totals can change, so a category count is orientation rather than proof that a particular reference suits a vehicle, workplace or job. The exact Hylomar listing, its current technical information and the item in front of you must agree.
What the Hylomar page actually covers
| Product group in this range | Current entries | Selection focus |
|---|---|---|
| Maintenance | 14 | Choose Universal Blue only for a non-setting joint where its technical data covers the fluids and temperature. |
All 14 products are maintenance compounds, but they span at least five distinct functions. Three Universal Blue sizes/listings are non-setting jointing products; Hylotyte is semi-hardening; four Hylosil listings are RTV or instant-gasket silicones; four anaerobic products divide locking, thread sealing and retention; and two exhaust products divide assembly from local repair. Pack size does not identify chemistry or safe use.
Build a reliable shortlist
Classify the joint before selecting a product. Decide whether the requirement is gasket dressing, a flexible formed gasket, controlled fastener locking, pipe-thread sealing, cylindrical retention, exhaust assembly or limited exhaust repair. Record materials, surface finish, gap, temperature, fluid and dismantling expectation, then compare the exact technical sheet.
| Check | Why it matters | Useful evidence |
|---|---|---|
| Cure behaviour | Non-setting, semi-hardening, RTV and anaerobic products develop seals differently | Exact Hylomar family and technical data sheet |
| Joint form | Flanges, pipe threads, bolts and cylindrical fits impose different stresses | Component drawing or manufacturer repair procedure |
| Materials | Metal, plastic, coated and porous faces may need different preparation | Both mating materials and product compatibility table |
| Service exposure | Fluid, gas, pressure and temperature can attack an unsuitable chemistry | Known medium, operating range and system specification |
| Gap and surface | Film thickness and roughness affect whether the sealant can bridge the joint | Measured or specified gap and surface condition |
| Future service | High-strength retention and curing sealants change dismantling effort | Required strength, tools, heat limits and service plan |
The word universal in Universal Blue is a product name, not permission to use it in every system. Likewise, silicone, thread lock and exhaust compound are broad descriptions. The exact grade, data sheet and component instruction must agree.
Universal Blue non-setting jointing compound
Hylomar Universal Blue is identified by the manufacturer as a polyester-urethane, non-setting and non-hardening gasket and jointing compound. Its stated benefits include extended assembly time and easier dismantling, with resistance to a defined list of industrial fluids and a documented operating range. The AutoMotoPart page offers 40 g blister-card, 40 g tube and 100 g tube formats of this same family.
Apply only to clean, dry surfaces in the thin film or bead described by the technical sheet, then allow the stated solvent-evaporation period. A non-setting compound can move if applied excessively, so keep it away from oilways, coolant passages and other internal openings. Follow the component's gasket and torque requirements; using sealant does not authorise omission of a specified gasket or altered fastener tightening.
Hylotyte and Hylosil curing behaviour
Hylotyte Red 100 is a synthetic semi-hardening compound with strong water resistance and heat-activated development. Hylomar lists cooling-system housings, flat rigid sump and gearbox housings and certain environmental seals as typical applications. That profile differs from Universal Blue even where both might be described generally as jointing compounds. Confirm fluid, surface and gap, and allow the product to become tacky as its instructions require.
Hylosil 102 is part of Hylomar's engineering-grade RTV silicone range. It cures rather than remaining permanently non-setting, and its data defines skin time, temperature range and physical properties. Instant Gasket is also a silicone-family product but should be selected from its own sheet. Control bead size so squeezed-out material does not enter a passage, and allow the specified cure before fluid exposure or operation.
Nut Lock, Stud Lock, Thread Sealant and Retainer
The four 50 ml anaerobic products serve different metal-assembly functions. Nut Lock is a medium-strength thread-locking grade; Stud Lock is intended where a stronger locked threaded assembly is required; Low Strength Thread Sealant addresses metal pipe threads; and Retainer is for cylindrical fits. Strength words alone do not establish suitability because viscosity, maximum thread size, gap, material and temperature also matter.
Anaerobic products typically cure when confined between compatible metal surfaces and isolated from air. Clean and prepare threads or fits exactly as directed, particularly on passive or plated metals where an activator may be relevant. Apply the specified amount, assemble within the working time and allow cure before loading. Plan dismantling before choosing high strength; forcing a retained or locked component can damage it.
Exhaust assembly paste and repair putty
Hylomar Exhaust Assembly Paste is a water-based, heat-curing jointing compound intended for eligible exhaust assembly joints. Exhaust Repair Putty is a different consistency for eligible small holes or cracks. Neither product should be used to disguise a dangerously corroded pipe, failed mounting, damaged catalyst, flex section or leak close to the passenger compartment.
Inspect the cold exhaust throughout, identify the true leak and assess remaining metal thickness. Prepare rust and contamination only by the stated method, apply the correct product to the correct joint or defect and allow the required drying and heat cure. Keep material from sensors, catalyst internals and clamping faces unless expressly instructed. After curing, check for leakage safely without touching hot components or inhaling exhaust gas.
Preparation, assembly and fault diagnosis
Remove old gasket and sealant without gouging mating faces, and check flatness, cracks, corrosion and fastener condition. Degrease with a method compatible with the material and new chemistry, then let surfaces dry. Observe the product safety data, provide ventilation and prevent skin or eye contact. Store caps and nozzles clean so cured fragments are not driven into a fresh bead.
Apply a continuous controlled path around fasteners and passages as the repair procedure shows. Assemble in sequence, use the correct torque and respect skin, tack, working and full-cure times. A persistent leak after correct application calls for renewed diagnosis of faces, gasket, pressure and component integrity. Adding more compound outside an assembled joint rarely corrects the underlying fault.
From identification to a checked result
| Stage | Good practice for this range | Mistake to avoid |
|---|---|---|
| Classify | Identify flange, gasket, thread, cylindrical fit or exhaust defect | Starting with a tube because its colour looks familiar |
| Verify | Check chemistry, materials, fluid, gap, temperature and strength | Treating universal or silicone as unrestricted |
| Prepare | Remove residue, inspect damage and clean and dry as specified | Sealing over rust, oil or distorted faces |
| Apply | Use the stated film or bead and protect passages and sensors | Adding excess material in hope of a stronger seal |
| Cure and test | Observe assembly, torque and cure instructions before checking | Pressurising or heating before the product is ready |
Keep the product batch, technical sheet and repair record with the job. Note which faces were prepared, whether a gasket remained, the tightening sequence and when the joint entered service. That record helps diagnose a repeat leak without mixing up chemistries.
Reading real Hylomar references
The Hylomar names below are examples from the current range and show why the complete description matters. They are not universal Hylomar recommendations and should not be treated as a fitment list. Within Hylomar, a shared family word can conceal a different dimension, connector, material, pack format, operating condition or installation side.
| Example listing | What to verify beyond the name |
|---|---|
| Exhaust Assembly Paste - 500g | Complete Hylomar product name, chemistry, pack and technical sheet |
| Exhaust Repair Putty - 250g | Joint materials, surface finish, gap, gasket and assembly method |
| Hylomar Universal Blue Gasket & Jointing Compound - 100g | Fluid or gas, operating temperature, pressure and cure exposure |
| Hylomar Universal Blue Gasket & Jointing Compound - 40g Blister Card | Required locking strength, dismantling plan, torque and passage protection |
| Hylomar Universal Blue Gasket & Jointing Compound - 40g | Complete Hylomar product name, chemistry, pack and technical sheet |
| Hylomar Nut Lock - 50ml | Joint materials, surface finish, gap, gasket and assembly method |
| Hylomar Low Strength Thread Sealant - 50ml | Fluid or gas, operating temperature, pressure and cure exposure |
| Hylomar Retainer - 50ml | Required locking strength, dismantling plan, torque and passage protection |
The current range includes products with similar tube sizes and overlapping words such as gasket, sealant and lock. Identify Universal Blue, Hylotyte, Hylosil, the individual anaerobic grade or the precise exhaust compound before use.
Common errors around Hylomar products
- Assuming Universal Blue can be used in every fluid or temperature because of its name.
- Treating non-setting Universal Blue, semi-hardening Hylotyte and curing Hylosil as equivalent.
- Using Nut Lock, Stud Lock, pipe-thread sealant and cylindrical Retainer interchangeably.
- Applying RTV so heavily that cured material can detach inside an oil or coolant passage.
- Omitting a specified gasket or changing torque because sealant has been added.
- Applying exhaust repair putty to deeply corroded or structurally failed pipework.
- Operating, heating or filling a system before the stated tack or cure stage.
- Adding compound around an external leak without dismantling and diagnosing the joint.
Hylomar questions and answers
Q: What types of Hylomar product are listed?
A: The range includes non-setting and semi-hardening jointing compounds, RTV silicones, anaerobic locking and retaining grades, and exhaust compounds.
Q: Does Universal Blue set hard?
A: No. Hylomar describes it as non-setting and non-hardening; use it only within its stated application data.
Q: Is Hylotyte Red 100 the same as Universal Blue?
A: No. Hylotyte is semi-hardening and develops differently with heat, with its own fluid and application profile.
Q: What is Hylosil 102?
A: It is a black engineering-grade room-temperature-vulcanising silicone sealant with specified cure and service properties.
Q: Can RTV be used instead of every gasket?
A: No. Follow the component maker's requirement for a gasket, dressing or formed-in-place sealant.
Q: What is the difference between Nut Lock and Stud Lock?
A: They serve threaded locking roles with different strength requirements; confirm the exact grade and disassembly plan.
Q: Is Low Strength Thread Sealant a general bolt locker?
A: No. It is aimed at compatible metal threaded pipe joints and has its own viscosity and cure requirements.
Q: What is Hylomar Retainer used for?
A: It is an anaerobic retaining grade for compatible cylindrical parts, not a substitute for every thread lock.
Q: Are exhaust paste and repair putty interchangeable?
A: No. One is for eligible assembly joints and the other for eligible local defects; inspect structural condition first.
Q: How much gasket compound should be applied?
A: Use the continuous thin film or controlled bead specified by the exact technical sheet and joint procedure.
Q: Why is cure time important?
A: A curing product may not reach its intended seal or strength if exposed to fluids, pressure or heat too early.
Q: What if the joint still leaks?
A: Dismantle and diagnose surface condition, gasket, fasteners, pressure and product selection rather than coating the outside.