MEKP Catalyst — Peroxide Initiator for Polyester & Vinyl Ester
Allzone Trading supplies MEKP (methyl ethyl ketone peroxide) catalyst used to cure unsaturated polyester and vinyl ester resin systems in casting, cast stone and composite production. MEKP is an organic peroxide with strict handling, storage and incompatibility requirements. Active oxygen content, dosage range and storage conditions are confirmed against supplier documentation at quotation.
At a glance
- Product
- MEKP Catalyst
- Grades
- Confirmed at quotation
- Typical applications
- Curing unsaturated polyester casting and laminating resins · Curing vinyl ester laminates and linings · Cultured marble and cast stone production
- Packaging
- Packaging and pack size confirmed at quotation against the grade supplied
Handling notice. This product requires review of the supplier technical data sheet and safety data sheet before purchase and use. Request both documents for the exact grade under consideration.
- • Certificate of Analysis is provided against the confirmed shipment, grade and batch.
- • Manufacturer TDS and SDS are subject to grade and supplier confirmation and are available on request.
- • Grades, packaging and origin above are indicative sourcing options and are confirmed at quotation.
Available grades from container-direct sourcing
Typical applications
- Curing unsaturated polyester casting and laminating resins
- Curing vinyl ester laminates and linings
- Cultured marble and cast stone production
- Gel coat cure in composite tooling
- Filled polyester casting at controlled gel times
Why Canadian buyers choose us
- Enquiries handled against your part, mould and process — not a fixed stock list
- Grade, working properties and mix data confirmed in writing before order confirmation
- Supplier technical data sheet and safety data sheet provided for the grade actually offered
- LTL and FTL freight to studios, precast plants, fabricators and distributors across Ontario, Quebec and Western Canada
- Quantities reviewed per enquiry, from trial kits through to pallet and container programmes
Typical industries served
Material identity
MEKP Catalyst (methyl ethyl ketone peroxide) — identifiers and the names buyers use
- Chemistry
- Organic peroxide initiator
- CAS
- 1338-23-4
Also searched as
Industry terminology
Identifiers are published for material identification. The exact specification of any offered grade is confirmed against supplier documentation at quotation.
Buyer intent coverage
MEKP Catalyst (methyl ethyl ketone peroxide) — what it is, where it is used, how it is chosen
MEKP is the initiator that makes polyester and vinyl ester systems cure. Every cast marble plant, FRP fabricator and gel coat shop in the country buys it, and it is the one product in this group where handling matters more than performance: it is an organic peroxide with segregated storage, incompatibility and disposal requirements that the safety data sheet defines. The commercial conversation is about matching the initiator to the resin system and to the shop's process, not about optimising unit price.
Primary uses
- Free-radical initiation
- Cure control for polyester and vinyl ester
- Gel-time adjustment
Applications
- Curing unsaturated polyester laminating and casting resin
- Curing vinyl ester laminates
- Curing polyester gel coats
- Cast marble and simulated stone production
Advantages
- The established initiation route for polyester and vinyl ester across the whole industry
- Lets the fabricator adjust cure to shop conditions within the resin supplier's stated system
- Universally understood by Canadian composites and cast marble operations
Limitations to consider
- Organic peroxide with strict segregation requirements — it must never be stored or mixed near promoters, accelerators or reducing agents
- Incorrect addition causes either uncured product or a dangerous exotherm, so process control is a safety issue rather than a quality one
- Addition level is set by the resin supplier for their exact system and shop conditions, and is never generalised
- Mix ratio, pot life, working time, demould time, full-cure schedule, hardness, tear strength, elongation, shrinkage, viscosity and temperature resistance are properties of one specific supplier system. They are never quoted here from memory or by analogy with a similar product; they are read from the supplier data sheet for the exact material offered and confirmed at quotation.
How to choose the right grade
- Start from the part: section thickness, required appearance, and whether it is a prototype, a short production run or a structural element
- State the mould the material will be cast or laminated into, because mould material and resin chemistry have to be compatible
- Describe the shop — mixing method, ventilation, temperature and whether the process is poured, sprayed or laid up by hand
- Name the exact resin system it will initiate, because the resin supplier defines the compatible initiator
- Confirm your segregated storage and disposal arrangements before the first delivery
- Mould-making and casting behaviour depends on the pattern, the shop temperature and humidity, the mixing method and the operator. A production-representative trial on your own pattern and in your own shop conditions is the only honest way to qualify a material before a run is committed.
- Exact specification is confirmed against supplier documentation at quotation.
Typical grades
- Products the supplier distinguishes by active oxygen content and formulation
- Products intended for specific resin families as the supplier designates
- Buyers search this category by grade name, and those names describe what the workshop needs rather than what is asserted here. Which grade a specific offer corresponds to, and what the supplier declares for it, is read from the technical documentation issued for the exact material quoted.
- Materials in this category interact: rubbers, releases, sealers, resins, pigments and fillers can inhibit cure, stain a surface or shorten mould life when they are combined outside the combinations the supplier has tested. State every material already in the process at enquiry so compatibility is checked against supplier documentation rather than discovered on the shop floor.
- Reactive materials age in the container, and moisture-sensitive systems age faster once opened. Order against real consumption rather than against a discount, and confirm the shelf life the supplier states for the exact product and pack.
Comparable materials — how MEKP Catalyst (methyl ethyl ketone peroxide) sits against alternatives
- Other initiator chemistries where the resin supplier designates them for their system
- Pre-promoted resin systems that change how initiation is handled in the plant
- Ultraviolet-cure systems for suitable geometries, where the process allows
- Shops looking for an alternative, replacement or second-source supplier should state the incumbent product, the supplier system currently approved and the property being matched. Equivalence on family name alone is not equivalence in production: cure profile, surface behaviour, colour and release characteristics all shift between sources, so a side-by-side trial is planned before a changeover.
Comparable-material reference. Grade selection is confirmed at RFQ against your process.
Procurement coverage
How to specify, order and receive MEKP Catalyst (methyl ethyl ketone peroxide)
Written for procurement, quality and technical buyers in Canada and the United States. No numeric price, MOQ, stock or lead-time value is published — those are confirmed per shipment in the quotation and against the confirmed batch.
How buyers specify at RFQ
- The exact product identity and supplier system the shop needs, including the component set for a multi-part system
- The process it will be used in, and the equipment used to mix, pour, spray or apply it
- The pattern, mould or substrate it will contact, and every other material already in that process
- The properties the supplier must declare on the data sheet for your application
- The documentation set required before the material can enter production
- Exact specification is confirmed against supplier documentation at quotation.
Packaging options (industry-standard)
- Pail and drum formats are the usual industrial options for liquid systems
- Kit formats pairing the components of a two-part system are common where the shop mixes by kit
- Intermediate bulk formats are used by higher-volume producers where the plant can receive them
- Packaging options and available pack sizes are confirmed with each quotation.
Storage & handling
- Store containers closed, upright and within the temperature range the supplier states for the product
- Condition material to shop temperature before mixing; cold material behaves differently from conditioned material
- Keep moisture-sensitive components sealed, and segregate reactive components from each other in storage
- Rotate stock by receipt date and record the lot used against each production batch
- Canadian winter transport and storage matter here: several materials in this category thicken, crystallise, freeze or lose performance at low temperature, and recovery behaviour after freezing is product-specific. Confirm cold-weather handling and shop conditioning guidance against the supplier documentation before a winter delivery.
- This category includes reactive chemistry, respirable mineral dust, peroxides and solvent-borne products. Ventilation, personal protection, segregated storage and disposal requirements come from the safety data sheet for the exact product and from the requirements of the provincial regulator for your site.
Documentation available
- Technical data sheet (TDS) for the exact product offered, stating working properties as the supplier declares them
- Safety data sheet (SDS) in the format required for Canadian import, in English and French where the receiving site requires it
- Certificate of analysis (COA) or batch documentation where the supplier issues it for the confirmed lot
- Handling, mixing and storage instructions issued by the supplier for the exact system
- Test reports or conformity statements where the project specification requires them and the supplier issues them
- Documentation is confirmed per batch at quotation; availability depends on the grade and supplier offered.
- Ask for the documentation pack against the exact product at the enquiry stage rather than after the order. Documentation availability differs by supplier and by manufacturing site, and in this category the data sheet is the only place where the working properties of a system are legitimately stated.
RFQ checklist for mekp-catalyst-canada
Include these fields to receive an accurate Canada-landed quotation
- The exact product or supplier system required, and the incumbent it is replacing where there is one
- The process, equipment and shop conditions the material will be used in
- Volume per order and expected annual usage, so the offer is built on real consumption
- Pack format your shop or plant can physically receive and handle
- Documentation required before the material can be used in production
- Delivery province or receiving location in Canada
- The process the material runs in: casting, lamination, spray-up or infusion
- Section thickness and part size, since these govern exotherm and handling on the floor
- Whether the finished part is decorative, functional or structural, and any project specification it must satisfy
- Landed cost in Canada is driven by pack format, delivery province and receiving arrangements as much as by unit price, and dense mineral products and dilute liquids both carry weight that is not function. Quotations are compared delivered to your shop or plant rather than ex-works.
Technical & procurement detail
What MEKP does+
MEKP initiates the cure of pre-promoted polyester and vinyl ester resins. Dosage sets gel time: more catalyst means a faster gel, a higher peak exotherm and more risk of cracking in thick sections; less means a longer gel and, below the working minimum, incomplete cure and permanent surface tack. Dosage is always taken from the resin supplier's range, not from habit.
Temperature changes everything+
The same dosage behaves very differently in a cold shop and a warm one. Shops that keep resin, filler and moulds within a controlled temperature band get repeatable gel times; shops that do not chase catalyst levels all year. Trial each seasonal change rather than assuming a fixed percentage.
Handling and storage — non-negotiable+
MEKP is a strong oxidiser. It must never be mixed directly with cobalt accelerator or any promoter — that combination can react violently. It is kept in its original vented container, away from heat, ignition sources, reducing agents, acids and metals, and it is dispensed with dedicated equipment. Storage temperature limits and shelf life come from the supplier's documentation and are not optional guidance.
Safety in use+
Eye and skin protection is mandatory; MEKP causes serious eye damage. Spills are managed under the safety data sheet procedure for the product supplied, and waste is not consolidated with other chemicals. Every user in the shop should be trained on these rules before the first drum is opened.
Specification options+
Working properties are configurable options within this canonical product, not separate products. Depending on the family, that can include grade, viscosity, mix ratio, pot life and demould time, hardness, colour, particle size or fibre length, and pack format. No configuration is presented as stocked or approved until it is confirmed against the supplier's technical data for the exact material offered. Supplier grade names, factory codes and manufacturer brands are not published here.
What to include in your enquiry+
Send the resin system you cure, your shop temperature range, typical batch sizes, your monthly consumption and your pack size and storage arrangements.
Frequently asked questions
How much MEKP should be added?+
Use the dosage range in the resin supplier's data for the grade and temperature you are working at, and prove it with a gel-time trial. Dosage is not a fixed universal percentage.
Can MEKP be mixed with cobalt accelerator?+
Never directly. The combination can react violently. Accelerator is dispersed in the resin first, and only then is catalyst added, following the supplier's sequence.
Why is my laminate still tacky?+
Under-catalysation, low temperature or air inhibition at the exposed surface. Check dosage against the supplier range, check shop temperature, and use a sealed or wax-containing topcoat where a tack-free surface is needed.
How should MEKP be stored?+
In its original vented container, within the supplier's temperature limits, away from heat, ignition sources, accelerators, reducing agents, acids and metals, and within its stated shelf life.
Does MEKP expire?+
Yes. Organic peroxides lose active oxygen over time and are shelf-life limited. Use the supplier's stated shelf life and storage conditions and rotate stock.
Are technical documents provided before ordering?+
Yes. The supplier technical data sheet and safety data sheet for the exact grade offered are provided with the quotation, and the working properties in those documents govern — not any general description on this page.
What quantities are quoted?+
Quantities are reviewed per enquiry, from trial quantities through to pallet and full container programmes for production users and distributors.
Technical knowledge for MEKP Catalyst Supplier — Polyester Resin | Canada
Engineering and purchasing guidance written for this material — understand it, apply it, compare options, specify a grade, and fix production problems.
Comparison Articles
Related products
Materials commonly quoted alongside MEKP Catalyst by the same plants.
Polyurethane Casting Resin
Short-run production parts cast in silicone moulds
Flexible Polyurethane Casting Resin
Bushings, pads, mounts and wear parts in maintenance work
Epoxy Casting Resin
River tables and thick decorative surface castings
Unsaturated Polyester Casting Resin
Cultured marble, onyx and solid surface casting
Need a quote on MEKP Catalyst?
Request pricing, TDS/SDS and available documentation. We usually acknowledge enquiries within one business day; samples are subject to supplier availability and product classification.