Tax incl. Tax excl.

Prepregs

Pre-preg is a term for "pre-impregnated" composite fibers where a matrix material, such as epoxy, is already present. The fibers often take the form of a weave and the matrix is used to bond them together and to other components during manufacture. The matrix is only partially cured to allow easy handling; this is called B-Stage material and requires cold storage, normally at -18 ºC (-0.4 ºF) to prevent complete curing. B-Stage pre-preg is always stored in cooled areas since heat accelerates complete polymerization. Hence, composite structures built of pre-pregs will mostly require an oven or autoclave to cure.

In the B-stage, the resin is partially cured, and usually tacky. When the resin is brought up to an elevated temperature, it often returns briefly to a liquid state prior to hardening completely. Once cured, the thermoset resin which was in the b-stage, is now fully cross-linked.

Pre-preg allows one to impregnate the fibers on a flat workable surface, or rather in an industrial process, and then later form the impregnated fibers to a shape which could prove to be problematic for the hot injection process. Pre-preg also allows one to impregnate a bulk amount of fiber and then store it in a cooled area for an extended period of time to cure later. Unfortunately the process can also be time consuming in comparison to the hot injection process and the added value for pre-preg preparation is at the stage of the material supplier.

The primary resin matrix used is epoxy. However, other thermoset resins are made into prepregs including BMI (mainly for tooling) and phenolic resins (fire retardant applications).

At Castro Composites, we offer a wide range of epoxy prepregs, but we can also supply fire-resistant prepregs with BIO-based high-performance resins using polyfurfuryl alcohol (PFA) chemistry. In both cases, scheduling is necessary as we do not keep them in stock regularly, and they are manufactured on demand. Please request a quote for delivery time without obligation.

Advantages of Prepregs

  • Perhaps the greatest advantage of using prepregs is their ease of use. An epoxy prepreg comes on a roll and has the desired amount for both resin and hardener already impregnated in the fabric. Operators are not in contact with hazardous products.
  • No mixing ratio mistakes possible.
  • Glass to fibre weight ratio control.

Disadvantages of Prepregs

Shelf Life
Since the epoxy is in a B-stage, it is required to be stored either refrigerated or frozen prior to use. Additionally, the overall shelf life can be low, normally ranging from few days to a month at 23 ºC.

Carbon / Epoxy
Carbon / Epoxy
Glass / Epoxy
Glass / Epoxy
Aramid / Epoxy
Aramid / Epoxy
Flax / Epoxy
Flax / Epoxy
Carbon / Aramid
Carbon / Aramid
50 gsm Plain Glass-Epoxy Prepreg VTC401-G50-STYLE 1080-50% RW, Width 1270 mm

50 gsm Plain Glass-Epoxy Prepreg VTC401-G50-STYLE 1080-50% RW, Width 1270 mm

VTC401G50
SHD
VTC401 is an epoxy resin system designed to give an initial cure at low temperatures or snap cure at high temperatures with enhanced toughness, honeycomb bondability and higher service temperature, giving greater flexibility in component manufacture.
€43.75 €52.94 Tax incl. €43.75 Tax excl.
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50 gsm Plain Glass-Epoxy Prepreg VTC401-G50-STYLE 1080-50% RW, Width 1270 mm

25 gsm Plain Glass-Epoxy Prepreg VTC401-G25-PW-70%RW, 1030 mm wide

SHD3295-1030
SHD
VTC401 is an epoxy resin system designed to give an initial cure at low temperatures or snap cure at high temperatures with enhanced toughness, honeycomb bondability and higher service temperature, giving greater flexibility in component manufacture.
Out-of-Stock
€48.00 €58.08 Tax incl. €48.00 Tax excl.
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50 gsm Plain Glass-Epoxy Prepreg VTC401-G50-STYLE 1080-50% RW, Width 1270 mm

25 gsm Plain Glass-Epoxy Prepreg VTC401-G25-PW-70%RW, 1270 mm wide

SHD2597-1270
SHD
VTC401 is an epoxy resin system designed to give an initial cure at low temperatures or snap cure at high temperatures with enhanced toughness, honeycomb bondability and higher service temperature, giving greater flexibility in component manufacture.
€48.00 €58.08 Tax incl. €48.00 Tax excl.
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MTFA500 Epoxy Resin Adhesive Film for Prepregs

MTFA500 Epoxy Resin Adhesive Film for Prepregs, 1250mm

MTFA500150
SHD
MTFA500 (DF044) Adhesive Film  MTFA500 (DF044) adhesive resin film is designed to cure between 80 and 120°C, allowing flexibility in component manufacture.  
€48.95 €59.23 Tax incl. €48.95 Tax excl.
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200 gsm Glass-Epoxy Prepreg Alutex MTP305 V-202T-33%RW, width 1270 mm

200 gsm Glass-Epoxy Prepreg Alutex MTP305 V-202T-33%RW, width 1270 mm

20501
SHD
Alutex MTP305 V-202T is a glass prepreg manufactured with a high transparency modified epoxy resin. It is suitable for aesthetic carbon composite parts where high cosmetical requirements are needed. The epoxy resin MTCV305 can be used with carbon or metallic mould with the standard technologies: Hot Press, Wrapping, Autoclave and Vacuum Bag.
Out-of-Stock
€49.00 €59.29 Tax incl. €49.00 Tax excl.
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300 gsm Forged Carbon...

300 gsm Forged Carbon Prepreg SM 520 12K ZH C12mm- X1 120BS 42%RW, 127 cm wide

SM52012K/127
SM 520 12K ZH C12mm- X1 120BS 42%RW forged carbon prepreg is a recycled carbon fiber prepreg developed for aesthetic applications. It is made of chopped tow fibres impregnated with an epoxy resin system. This product offers an out-of-the-ordinary surface appearance. SM 520 12K ZH C12mm- X1 120BS is formulated for autoclave and can also be processed...
Out-of-Stock
€53.95 €65.28 Tax incl. €53.95 Tax excl.
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200 gsm Plain Glass-Epoxy Prepreg VTC401-G200T-45%RW, Width 1230 mm

200 gsm Twill Glass-Epoxy Prepreg VTC401-G200T-45%RW, Width 1270 mm

VTC401G200T
SHD
VTC401 is an epoxy resin system designed to give an initial cure at low temperatures or snap cure at high temperatures with enhanced toughness, honeycomb bondability and higher service temperature, giving greater flexibility in component manufacture.
€55.00 €66.55 Tax incl. €55.00 Tax excl.
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100 g/m2 Unidirectional Flax-Epoxy Prepreg VTC401-UDFLAX100-50%RW-600mm
  • New

100 g/m2 Unidirectional Flax-Epoxy Prepreg VTC401-UDFLAX100-50%RW-600mm

SHD4303-600
SHD
VTC401 is an epoxy resin designed to provide initial curing at low temperature or fast curing at high temperatures with toughness, adhesion to honeycomb, and improved service temperatures, providing greater flexibility in component manufacturing. Typical applications: General – Cosmetics Roll width: 600 mm Type of reinforcement yarn: Unidirectional...
€55.40 €67.03 Tax incl. €55.40 Tax excl.
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50 gsm Plain Glass-Epoxy Prepreg VTC401-G50-STYLE 1080-50% RW, Width 1270 mm

105 gsm Plain Glass-Epoxy Prepreg MTC510-G105-PW-45%RW, 1270 mm wide

SHD3073-1270
SHD
The carbon-epoxy prepreg MTC510 is manufactured with an epoxy resin prepared to cure within a variable temperature range of 80°C to 120°C.It is a high-toughness epoxy resin designed for the fabrication of parts that can be supplied with a wide variety of fibers and in a unidirectional format. Typical Applications: General Roll Width: 1270 mm
€58.00 €70.18 Tax incl. €58.00 Tax excl.
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300 g/m2 Satin Flame Retandant Glass-Epoxy Prepreg FRVC411B-G300-8HS-38%RW, 1270 mm width

300 g/m2 Satin Flame Retandant Glass-Epoxy Prepreg FRVC411B-G300-8HS-38%RW, 1270 mm width

SHD3074-1270
SHD
FRVC411B is a flame retardant epoxy resin system designed to cure between 65°C and 120°C allowing flexibility in component manufacture. It is a toughened, flame retarded epoxy resin system designed for component manufacturing that can be supplied on a variety of fabrics and in UD format to meet your cost and manufacturing requirements. Black pigmented,...
€61.95 €74.96 Tax incl. €61.95 Tax excl.
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300 gsm Forged Carbon...

300 gsm Forged Carbon Prepreg SM 520 12K ZH C12mm- X1 120BS 42%RW, 120 cm wide

SM52012K/120
SM 520 12K ZH C12mm- X1 120BS 42%RW forged carbon prepreg is a recycled carbon fiber prepreg developed for aesthetic applications. It is made of chopped tow fibres impregnated with an epoxy resin system. This product offers an out-of-the-ordinary surface appearance. SM 520 12K ZH C12mm- X1 120BS is formulated for autoclave and can also be processed...
Out-of-Stock
€63.70 €77.08 Tax incl. €63.70 Tax excl.
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Prepimpregnado Epoxi/Vidrio VTC401-EBX600

Glass-Epoxy Prepreg VTC401-EBX600-36%RW, Biaxial +-45º, 600 g/m2

PPEVVTC401
SHD
VTC401 is an epoxy resin system designed to give an initial cure at low temperatures or snap cure at high temperatures with enhanced toughness, honeycomb bondability and higher service temperature, giving greater flexibility in component manufacture.
€65.60 €79.38 Tax incl. €65.60 Tax excl.
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FLAXPREG T-UD 110

FLAXPREG T-UD 110 Flax-Epoxy prepreg, 550 mm wide

FlaxP-TUD-110
FLAXPREGT-UD is a range of pre-impregnated material based on an epoxy resin system and the UD flax fibres reinforcement developed by LINEO: the FlaxTapeTM FLAXPREG T-UD 110 is made with unidirectional FlaxTapeTM–110g of flax/m², with a 50% Epoxy Resin Weight. Toll width: 550 mm.
Out-of-Stock
€66.55 €80.53 Tax incl. €66.55 Tax excl.
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Prepeg Carbon-Epoxy VTC401-UD100-T700-40%RW-300P

100 g/m2 Unidirectional Carbon-Epoxy Prepreg VTC401-UD100-12K-HS-40%RW-300

T0355
SHD
VTC401 is an epoxy resin system designed to give an initial cure at low temperatures or snap cure at high temperatures with enhanced toughness, honeycomb bondability and higher service temperature, giving greater flexibility in component manufacture.
Last items in stock
€67.95 €82.22 Tax incl. €67.95 Tax excl.
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MTC510-UD300-HS-33%RW Unidirectional Carbon-Epoxy Prepreg of 300 g/m2 (24K), 300 mm wide

300 gsm Unidirectional Carbon-Epoxy Prepreg MTC510-UD300-HS-50K-33%RW, 300 mm wide

SHD3023-300P
SHD
MTC510 is an epoxy resin system designed to cure between 80°C and 120°C allowing flexibility in component manufacture. It is a toughened epoxy resin system designed for component manufacturing that can be supplied on a variety of fabrics and in UD format.
€68.15 €82.46 Tax incl. €68.15 Tax excl.
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OPS 75 (DF259) Surface Glass Prepreg for Tooling

OPS 75 (DF259) Surface Glass Prepreg for Tooling

OPS75GLASS-1270
SHD
OPS75 material is designed to give a high class finish with reduced pre-paint preparation and versatile out of autoclave curing. It can be supplied with carbon or glass fabric reinforcement. In this case, we supply this prepreg with a 300 sqm glass fabric.Typical applications: Automotive Body Panels – Out of Autoclave
Out-of-Stock
€69.00 €83.49 Tax incl. €69.00 Tax excl.
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Carbon - Epoxy Prepreg MTC510-C200T-HS-3K-42%RW Twill 200 g/m2

Carbon - Epoxy Prepreg MTC510-C200T-HS-3K-42%RW Twill 2x2 of 200 g/m2

WMTC510-C200T
SHD
MTC510 is an epoxy resin system designed to cure between 80°C and 120°C allowing flexibility in component manufacture. It is a toughened epoxy resin system designed for component manufacturing that can be supplied on a variety of fabrics and in UD format. Type of carbon fiber used in fabric production: Toray T300 3K, High Strength.
€69.00 €83.49 Tax incl. €69.00 Tax excl.
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Carbon-Epoxy Prepreg VTC401-C200T-HS-3K-42%RW- 1250 mm

200 gsm Twill Carbon-Epoxy Prepreg VTC401-C200T-HS-3K-42%RW, Width 1250 mm

VTC401C200T
SHD
VTC401 is an epoxy resin system designed to give an initial cure at low temperatures or snap cure at high temperatures with enhanced toughness, honeycomb bondability and higher service temperature, giving greater flexibility in component manufacture. Type of carbon fiber used in fabric production: Toray T300 3K, High Strength.
€73.00 €88.33 Tax incl. €73.00 Tax excl.
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450 gsm Forged Carbon...

450 gsm Forged Carbon Prepreg SM 775 12K C12mm - X1 120BS 42%RW, 120 cm wide

SM77512K/120
SM 775 GG 120 12K ZH C12mm - X1 120BS 42%RW forged carbon prepreg is a recycled carbon fiber prepreg developed for aesthetic applications. It is made of chopped tow fibres impregnated with an epoxy resin system. This product offers an out-of-the-ordinary surface appearance. SM 775 GG 120 12K ZH C12mm - X1 120BS 42%RW is formulated for autoclave and can...
€73.85 €89.36 Tax incl. €73.85 Tax excl.
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MTC510-UD300-HS-33%RW Unidirectional Carbon-Epoxy Prepreg of 300 g/m2 (24K), 300 mm wide

600 gsm Unidirectional Carbon-Epoxy Prepreg MTC510-UD600-HS-50K-35%RW, 600 mm wide

SHD3164-600P
SHD
MTC510 is an epoxy resin system designed to cure between 80°C and 120°C allowing flexibility in component manufacture. It is a toughened epoxy resin system designed for component manufacturing that can be supplied on a variety of fabrics and in UD format.
€91.50 €110.72 Tax incl. €91.50 Tax excl.
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