BPO Paste & MEKP Catalyst — Resin Hardeners for Ghana Industry
The curing agents that harden polyester, vinyl ester and acrylic resins — from fibreglass/GRP tanks and boats to body filler, artificial marble and chemical anchoring. Elrisa Chemicals supplies BPO paste and MEKP catalyst to industry across Ghana and West Africa.
Benzoyl peroxide (BPO) paste is a ready-to-use curing agent — the hardener, or "Part B" — that sets unsaturated polyester, vinyl ester and acrylic/MMA resins at room temperature. Mixed into resins, fillers, putties and adhesives (usually alongside an amine accelerator already present in the resin), it triggers the chemical reaction that hardens the material.
Supplied as a 50% benzoyl peroxide paste rather than a dry powder, it is safer and easier to dose, disperses evenly through the resin, and gives consistent, controllable curing — important for anyone mixing hardener by hand on a job site or production floor.
50% dibenzoyl peroxide, ~3.3% active oxygen
CAS 94-36-0
Store 5–25°C, away from heat and sparks
Learn the Basics
What Is MEKP?
Methyl ethyl ketone peroxide (MEKP) is a liquid catalyst used to cure unsaturated polyester and vinyl ester resins, typically dosed at 1–3% of resin weight. It is the standard initiator for hand lay-up and spray-up fibreglass/GRP work — the process used to build water and chemical storage tanks, GRP pipes, boats, roofing sheet and other composite structures.
Because it is a liquid rather than a paste, MEKP measures and mixes quickly into large resin batches, making it the go-to gel coat catalyst and laminating resin catalyst across the fibreglass industry.
Choosing the Right Hardener
BPO vs MEKP — Which Do You Need?
Both are the curing "Part B" mixed into a resin "Part A" — but they are not interchangeable. The application decides which one is correct.
BPO Paste
The right choice for fillers, putties, automotive body repair, cast and artificial marble, stone adhesives, chemical anchoring resins, and acrylic/MMA systems.
Neither BPO paste nor MEKP is used to cure PE or PVC plastics — both are curing agents for thermoset resins only. Not sure which grade fits your process? Ask our team.
Why It Matters
Built for Ghana's Composite & Resin Industry
Consistent curing protects your production line, your product quality, and your margins.
Predictable, Controllable Cure
Even dispersion and consistent active-oxygen content mean fewer failed batches, less rework, and a curing process you can plan production around.
Local Stock, Faster Delivery
Held in stock in Ghana, ready to move — shorter lead times keep your fibreglass, marble or body-filler production line moving.
Trusted Elrisa Formulation
Consistent organic peroxide chemistry, supplied by Elrisa specifically for Ghana's composite and resin industry.
Product Range
Product Range & Technical Specifications
Three formulations covering premium, standard and liquid-catalyst curing needs. Full technical data below — always confirm against the current Safety Data Sheet (SDS) before use.
BPO Paste — Phthalate-Free Premium Grade
Premium
A phthalate-free benzoyl peroxide paste hardener; REACH-compliant, with strong heat resistance that suits warm climates.
Technical Data
Chemical: Dibenzoyl Peroxide (BPO) paste
Empirical formula C14H10O4 · Molecular weight 242.2 g/mol · CAS 94-36-0
Phthalate-free (benzoate-ester plasticizer system) — better heat-degradation resistance and better dissolution in resins and monomers
Available in white (neutral), red, blue and red-brown (colour = visual mixing guide; also pigments the cured substrate)
Use & Applications
Radical polymerization initiator and curing agent for vinyl, acrylic and unsaturated polyester / vinyl ester resins and their co-polymers, used with an accelerator (usually amine)
Curing depends on humidity, filler/resin composition, temperature and technique — always test on the actual compound first
Tubes, pails, carton box, drums (carton box & drums lined with a PE bag).
Safety & Storage
Store in original containers, away from flammables, heat, sparks, flames and direct sunlight
Keep away from reducing agents, amines, strong acids/bases, accelerators & promoters, copper/heavy metals, driers and rust — contamination can trigger violent decomposition
Store 5–25°C; heat causes decomposition and performance loss; freezing damages the emulsion
Rotate stock, oldest first (FIFO); never store with food or beverages
BPO Paste — Standard Grade
Standard
A standard, cost-effective benzoyl peroxide paste hardener for everyday polyester, vinyl ester and acrylic curing.
Technical Data
Chemical: Dibenzoyl Peroxide (BPO) paste
Empirical formula C14H10O4 · Molecular weight 242.2 g/mol · CAS 94-36-0
Dibenzoyl peroxide content: 50%
Active oxygen: 3.3%
Appearance: creamy paste · Odour: almost odourless
Insoluble in water · pH: acidic
SADT: 50°C
Recommended storage temperature: 5–25°C
Standard white/lightly beige; also available in red, blue and red-brown (visual mixing guide)
Use & Applications
Polymerization initiator and curing agent for vinyl, acrylic, styrene and unsaturated polyester / vinyl ester resins, used with an accelerator (usually amine)
Shelf life: 6 months under recommended storage conditions
Use & Applications
A standard reaction medium among organic peroxides; radical polymerization initiator and curing agent for vinyl, acrylic, styrene and unsaturated polyester / vinyl ester resins, used with an accelerator (usually cobalt)
Cures unsaturated polyester resins at room temperature or above; suited to work needing a longer handling time before gel
Store unopened, undamaged containers in a dry, well-ventilated place, out of direct sunlight
Keep away from fire, heat and ignition sources; never weigh it inside the storage room; keep sealed
Avoid contact with reducing agents (amines), acids, alkalis and heavy-metal compounds (accelerators, driers, metal soaps)
Store 5–25°C; rotate stock FIFO; never store with food or beverages
Packaging & Customization
Packaging That Fits Your Operation
From single-tube trial samples to bulk drums for continuous production, BPO paste is available in a full range of formats. MEKP is supplied in liquid containers sized to your volume.
Tubes: 6 g – 216 g
Cartridges
Cans: 24 g – 1 kg
Buckets: 5 – 25 kg
Drums: 150 – 250 kg
Standard colours: white, red, blue, red-brown. Customized packaging, colours and concentrations are available — tell us your specification.
Industries We Serve
Industries & Applications
From fibreglass tanks to artificial marble, BPO paste and MEKP catalyst serve a wide range of Ghanaian and West African industries.
Fibreglass / FRP & Composite Manufacturers
Tanks, laminates and composite structures cured with MEKP catalyst.
MEKP
Resin Importers & Distributors
Polyester and vinyl ester resin distributors stocking BPO and MEKP hardeners.
BPO / MEKP
Composite Raw-Material Suppliers
Supplying fibreglass and composite fabricators across the region.
BPO / MEKP
Automotive Refinish & Body Shops
Body-filler hardener for automotive body-repair distributors and workshops in Ghana.
BPO
Paint Manufacturers
Peroxide curing agents formulated into industrial paint and coating systems.
BPO
Marine — Boat Building & Repair
Fibreglass boat catalyst for hull lamination and repair.
BPO / MEKP
Water Tank Manufacturers
GRP water tank hardener for storage and process tank production.
MEKP
Pipe & Infrastructure
GRP pipe resin catalyst for sewer and water-treatment pipe systems.
MEKP
Sanitary Ware Manufacturers
Sanitary ware resin curing for wash basins, bathtubs and shower trays.
BPO / MEKP
Artificial / Cultured Marble & Quartz
Artificial marble hardener and cultured marble catalyst for countertops, vanities and decorative panels.
BPO / MEKP
Marble & Stone Processing
Stone adhesive hardener for artificial marble production, stone repair and adhesives.
BPO / MEKP
Adhesive & Sealant Manufacturers
Polyester and stone adhesives, structural bonding formulations.
BPO / MEKP
Construction Chemical Suppliers
Chemical anchoring resin Ghana suppliers and reinforcement systems.
BPO / MEKP
GFRP Rebar & Reinforcement
Composite construction reinforcement manufacturing.
MEKP
Road Marking Material Suppliers
Road marking catalyst for MMA cold-plastic road-marking systems.
BPO / MEKP
Industrial Fabricators
Composite housings, covers and enclosures cured with MEKP.
MEKP
Electrical & Telecom Infrastructure
Enclosures, junction boxes, cable trays, transformer and telecom housings.
MEKP / BPO
Cooling Towers & Water-Treatment Equipment
Cooling tower FRP tanks, scrubbers and process equipment.
MEKP
Corrosion Protection & Industrial Maintenance
Anti-corrosion linings and tank refurbishment.
MEKP
Food Processing
Food-grade GRP storage and process tanks.
MEKP
Oil & Gas
Oil and gas GRP Ghana pipes, chemical storage tanks and offshore repair materials.
MEKP / BPO
Mining
Mining anchoring Ghana, repairs and corrosion protection.
BPO / MEKP
Aquaculture & Fisheries
Aquaculture tanks Ghana, boats and floating structures.
MEKP
Swimming Pool Construction
Swimming pool fibreglass Ghana — pool shells and repair systems.
MEKP
Furniture & Wood Repair
Wood fillers and restoration compounds.
BPO
Acrylic Sheet & Solid-Surface / PMMA
PMMA acrylic hardener for solid-surface fabricators, signage and displays.
BPO
Industrial & PMMA Flooring Contractors
Peroxide-cured PMMA flooring systems.
BPO
Universities & Research Centres
Specification and R&D support for institutions such as KNUST, University of Ghana and CSIR.
R&D
Common Questions
BPO Paste & MEKP — Frequently Asked Questions
What is BPO paste used for?
BPO (benzoyl peroxide) paste is the hardener — the "Part B" — mixed into unsaturated polyester, vinyl ester and acrylic/MMA resins to cure them at room temperature. It's widely used in fillers and putties, automotive body-filler repair, cast and artificial marble, stone adhesives, chemical anchoring resins, and MMA road-marking systems. Supplied as a 50% benzoyl peroxide paste, it doses and disperses more safely and evenly than BPO powder.
What is MEKP used for?
MEKP (methyl ethyl ketone peroxide) is a liquid catalyst used to cure unsaturated polyester and vinyl ester resins, typically dosed at 1–3% of resin weight. It's the standard initiator for hand lay-up and spray-up fibreglass/GRP work, including water and chemical storage tanks, GRP pipes, boats, roofing sheet, and other composite structures.
What is the difference between BPO paste and MEKP?
Both are the curing "Part B" mixed into a resin "Part A", but they are not interchangeable — the application decides which to use. BPO paste is generally used with fillers, putties, body repair compounds, cast/artificial marble, stone adhesives, chemical anchoring and acrylic/MMA systems. MEKP, a liquid, is the standard catalyst for laminating fibreglass/GRP — tanks, pipes, boats, roofing and composites. Neither is used to cure PE or PVC plastics — only thermoset resins.
How much hardener/catalyst do I mix with resin?
MEKP is typically dosed at 1–3% of resin weight, and BPO paste dosage varies by grade, ambient temperature and the accelerator already present in the resin. Exact dosage affects gel time, cure speed and final properties, so always run a small test batch before full production and follow the resin manufacturer's recommendation and the product Safety Data Sheet (SDS).
What industries use BPO paste and MEKP in Ghana?
In Ghana and West Africa, BPO paste and MEKP are used by fibreglass/FRP fabricators, resin and composite raw-material distributors, automotive body shops, marine boat builders, GRP water tank and pipe manufacturers, sanitary ware and artificial marble producers, adhesive and construction-chemical suppliers, road-marking contractors, and industrial, oil & gas and mining fabricators — anywhere polyester, vinyl ester or acrylic resins are cured.
What packaging and colours are available?
BPO paste is available in tubes (6 g–216 g), cartridges, cans (24 g–1 kg), buckets (5–25 kg) and drums (150–250 kg), in standard colours of white, red, blue and red-brown. Customized packaging, colours and concentrations are available on request — contact us to discuss your specification.
How should it be stored?
Both are organic peroxides and should be stored between 5°C and 25°C, away from heat, direct sunlight, sparks and incompatible materials. Use a first-in, first-out (FIFO) stock rotation and always refer to the product Safety Data Sheet (SDS) for full handling, storage and transport guidance.
Do you supply samples / bulk orders in Ghana and West Africa?
Yes. Elrisa Chemicals produces and supplies BPO paste and MEKP catalyst to buyers across Ghana and West Africa, from trial samples through to bulk and recurring supply orders. Contact us or request a free sample to get started.
Safety note: BPO paste and MEKP are organic peroxides. Store at 5–25°C, away from heat, direct sunlight and incompatible materials, and always handle, transport and dispose of them according to the product Safety Data Sheet (SDS). Contact us for the current SDS before first use.
Ready to Cure Your Next Batch?
Request a free sample, get a quote, or speak with our team about BPO paste and MEKP catalyst supply in Ghana and West Africa.
