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Resins

Castro Composites specializes in high-quality thermoset resins. We exclusively work with the best brands in the market to provide you with exceptional solutions in the field of composite materials.

Our focus is on quality and performance. If you're looking for a specific resin brand, it's important to highlight that we only work with those that meet the highest quality standards. Your satisfaction and the final results are our priority.

Thermoset resins play an essential role in creating durable and efficient structures. These resins undergo an exothermic reaction triggered by the combination of the resin with the hardener or catalyst. When combined with reinforcement fibers, these resins generate high-performance composite materials. They act as elements that keep the reinforcements cohesive and preserve the mold's geometry.

In addition to their bonding function, these resins distribute mechanical loads and establish thermal limits. Factors like Glass Transition Temperature (Tg) and Heat Deflection Temperature (HDT) influence the response to different temperatures.

We explore various resin variants that we market:

  • Epoxy Resin: Noted for its exceptional durability and adhesion. Ideal for high chemical and mechanical resistance, as well as stability at high temperatures.

  • Vinyl Ester Resin: Ideal for corrosive and marine environments due to its chemical resistance and durability.

  • Urethane-Acrylic Resin: Balances flexibility and durability, ideal for demanding mechanical applications and wear resistance. Some references also offer excellent fire-resistant properties.

  • Polyester Resin: Versatile and economical, perfect for lower-cost projects with reasonably good mechanical and even chemical resistance properties.

  • Polyurethane Casting Resin: Offers easy pouring and high strength, ideal for prototypes and custom parts.

Each described resin variant in this main category has a specific role in creating composite materials. Explore the subcategories we link to below to get a more detailed explanation of the properties of each resin type and their applications. We're here to provide you with the most suitable resin according to your budget and property requirements.

Crystic 446PALV Low Exotherm Hand Lay-Up & Spray Up Polyester Resin

WRP0446
Crystic Resin 446PALV is a pre-accelerated, thixotropic, spray viscosity orthophthalic polyester resin. This laminating resin has rapid wet-out, low exotherm and fast hardening characteristics making it ideal for rapid mould turnaround. It contains a colour change system and will change from blue to to light honey colour when the catalyst is added to the...
Product available with different options
€10.70 €12.95 Tax incl. €10.70 Tax excl.

Crystic 446MPA35 Low Exotherm Hand Lay-Up & Spray Up Polyester Resin

WRP0446V
Crystic Resin 446MPA35 is a pre-accelerated, thixotropic, spray viscosity orthophthalic polyester resin. This laminating resin has rapid wet-out, low exotherm and fast hardening characteristics making it ideal for rapid mould turnaround. It contains a colour change system and will change from blue to to natural colour when the catalyst is added to the...
Out-of-Stock
€10.80 €13.07 Tax incl. €10.80 Tax excl.

Crystic R115PA Hand Lay-UP Ortho Polyester Resin

WRP0115A
Crystic R115PA is a thixotropic, accelerated, orthophtalic general purpose unsaturated polyester resin. CRYSTIC R 115 PA can be used by hand lay up or by spray application for the production of most glass reinforced laminates.
€10.95 €13.25 Tax incl. €10.95 Tax excl.

Crystic 198 Heat and Chemical Resistant Polyester Resin

WRP0198
Crystic Resin 198 is a medium viscosity orthophthalic polyester resin with good heat and chemical resistant properties. Developed for use in the chemical industry - tanks, pipes , fumestacks etc where heat and chemical resistance are both required but can also be used in industrial, transportation and building and construction applications.
€11.00 €13.31 Tax incl. €11.00 Tax excl.

Recapoli 957TPA L2 Orthopthalic Polyester Resin

RP957TPA
Recapoli 957TPA L2 is an easy-to-handle unsaturated polyester resin that can be used to make a large range of composite products. With Recapoli 957TPA L2 you can make durable parts in a cost-effective manner.  
Out-of-Stock
€11.00 €13.31 Tax incl. €11.00 Tax excl.

Crystic R115PA White Hand Lay-Up Orthophthalic Polyester Resin

WRP0115AB
Crystic R115PA is a thixotropic, accelerated, orthophtalic general purpose withe pigmented unsaturated polyester resin that can be used by hand lay up or by spray application for the production of most glass reinforced laminates.
€11.95 €14.46 Tax incl. €11.95 Tax excl.

Crystic R115PAV01 Hand Lay-up Flexible Orthophthalic Polyester Resin

WR0115AF
CRYSTIC R115PAV01 is a flexible, pre-accelerated, orthophtalic unsaturated polyester resin that can be used by hand lay up or by spray application for the production of most glass reinforced laminates. This resin can also be used for casting applications.
Last items in stock
€12.00 €14.52 Tax incl. €12.00 Tax excl.

Recapoli 955 INF-DCPD Polyester resin

WRP0955I
RECAPOLI 955INF-DCPD is a low viscosity DCPD based, pre-accelerated, unsaturated polyester resin in styrene monomer. This resin allows to produce laminates with comparatively short delamination times at an excellent level of polymerization. It has a very low peak exotherm.
Last items in stock
€12.00 €14.52 Tax incl. €12.00 Tax excl.

Crystic 489 PABTLV Hand Lay-Up Isophthalic Polyester Resin

WRP1489
Crystic 489 PABTLV is a thixotropic, isophthalic and pre-accelerated polyester resin. When used with Crystic Gelcoat 65PA, they produce a matched performance system for moulding boat hulls with outstanding durability and superior blister resistance. Crystic 489 PABTLV is approved by Lloyd’s Register of Shipping for use in the construction of craft under...
Last items in stock
€12.00 €14.52 Tax incl. €12.00 Tax excl.

Crystic 489PA35 Hand Lay-Up Isophthalic Polyester Resin

WRP0489PA35
Crystic 489PA35 is an isophthalic, thixotropic, and pre-accelerated unsaturated polyester resin. Ideal for the manufacture of laminates with reinforcing fibers in nautical applications and in shipbuilding. It is a formulation with gel time 33 to 37 min at 25ºC and with 2% PMEC catalyst. It has a Lloyd's Register of Shipping certificate.
Out-of-Stock
€12.00 €14.52 Tax incl. €12.00 Tax excl.

Crestafire® P1-3001PA Fire Retardant Hand Laminate Resin

CRP13001PA
Crestafire® P1-3001PA is a filled, pre-accelerated, fire retardant unsaturated polyester resin. It incorporates a selected grade of Alumina Trihydrate (ATH) which makes it suitable for the production of laminates where excellent resin flow, fire retardancy and low levels of smoke & toxic fumes are required. Crestafire® P1-3001PA is halogen free and...
€12.95 €15.67 Tax incl. €12.95 Tax excl.

Fetadit PA-47 Waterbased Epoxy Primer

WRE0047
Fetadit PA-47 is a waterbased epoxy primer with high adhesion to metals, wood, cement & concrete, etc. Ideal for improving the adhesion of laminates made with epoxy resins to these surfaces.
€13.88 €16.79 Tax incl. €13.88 Tax excl.

Recapoli 2196 Clear Casting Polyester Resin

WRP2196
Recoil 2196 is a clear, orthophthalic and pre-accelerated casting polyester resin with UV filter to prevent yellowing.
€15.50 €18.76 Tax incl. €15.50 Tax excl.

Crystic VE679PA Hand Lay-Up Vinyl Ester-DCPD Resin

WRV0679
Crystic Resin VE679PA is a pre-accelerated thixotropic DCPD modified vinylester resin. Developed for use as a skin coat in marine and tooling applications. Excellent blister resistance and reduced print through.  It has a 23 minute geltime and is Lloyd´s Register approved.
€16.95 €20.51 Tax incl. €16.95 Tax excl.

Recapoli PE-3680PA Polyester Resin for coating polystyrene foams

WRP0100
Recapoli 3680PA is a preaccelerated unsaturated polyester resin for lamination of polystyrene foams, usually with glass fabrics like surface veils and chopped strand mats. This resin does not attack or melt polystyrene foams (35-40 kg/m3 density).It is preaccelerated with a 0,2% of Cobalt 6% and catalysed with methyl ethyl ketone peroxide: 1.5% by...
€17.25 €20.87 Tax incl. €17.25 Tax excl.

Crystic RTR4010PA Rapid Tooling Low Profile Polyester Resin

RTR4010W
Crystic RTR 4010PA is a new, improved rapid tooling resin which incorporates better handling properties, lower viscosity, improved shrinkage control and is catalysed with standard MEKP catalyst.  RTR 4010PA is a thixotropic, filled, low profile resin for hand-lay mould making applications. RTR 4010PA helps to achieve faster mould making and eliminates...
€18.90 €22.87 Tax incl. €18.90 Tax excl.

ACT High Chemical Resistance Vinyl Ester Resin

WRV0580
Vinyl Ester ACT is a pre-accelerated thixotropic, high grade bisphenol A vinyl ester urethane resin.It which combines exceptional chemical resistance and an outstanding combination of heat resistance and flexibility. Furthermore Vinyl Ester ACT has very good handling and curing properties. Vinyl Ester ACT is resistant to many aqueous acidic salts and...
€18.95 €22.93 Tax incl. €18.95 Tax excl.

Crystic VE 677 PA High Chemical Resistance Epoxy Bisphenol Vinyl Ester Resin

WRV677PA
CRYSTIC VE 677 PA is a vinyl ester resin based on epoxy bisphenol A. It is thixotropic and pre accelerated. CRYSTIC VE 677 PA has excellent chemical resistance to a wide range of substances (acids, alkalies and oxidising agents). Crystic VE 677 PA utilises isophthalic UP resin as an additive in order to achieve favourable handling performance...
€18.95 €22.93 Tax incl. €18.95 Tax excl.

X590AC High Chemical Resistance Vinyl Ester Resin

WRV0590
X590AC is an epoxy novolac based vinyl ester, dissolved in styrene. X590AC provides excellent thermal and chemical resistance against solvents, acids and oxidizing media like chlorine. The resin offers high retention of strength at elevated temperatures.
€19.50 €23.60 Tax incl. €19.50 Tax excl.

Urethane Acrylate Resin Crestapol 1261, High Fire Resistance

CR1261
Crestapol® 1261 is a high performance l ow viscosity urethane acrylate type resin to work with Carbon Fibre, Glass or any other reinforcement types, suitable for infusion, RTM and similar processes at room temperature. Crestapol® 1261 produces laminates with high strength and toughness with exceptional water and hydrolysis resistance.
€20.20 €24.44 Tax incl. €20.20 Tax excl.

Crestapol 1260 Urethane Acrylate Resin

RP1260
Crestapol 1260 is a low viscosity urethane acrylate resin for use in pultrusion, filament winding,  RTM and vacuum infusion applications. This is a tough resin, compatible for use with carbon fibre or any other fabric.
€20.20 €24.44 Tax incl. €20.20 Tax excl.

PU-31 Rapid Prototyping Casting Polyurethane Resin

WPU0031
High reactivity and low viscosity two component rigid polyurethane without foaming agents. Suitable for the production of parts with a density between 1000 - 1300 kg/m3., high hardness and good physical and mechanical properties.
Last items in stock
€25.00 €30.25 Tax incl. €25.00 Tax excl.

Castropox 4307 FLEX / 1209 Flexible General Purpose Epoxy Resin

WRE1784A
Castropox 4307FLEX/1209 is a flexible general purpose epoxy system suitable for fiberglass laminates on wood, concrete, metals etc. Ideal for working with any fiberglass, carbon or aramid (Kevlar).
€29.95 €36.24 Tax incl. €29.95 Tax excl.
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