Producing a Glass Fibre Mould Using an ABS Cowl

ITEMS REQUIRED

 

FIBRETECH GB EPOXY LAMINATING RESIN AND HARDENER,

FIBRETECH GB WAX RELEASE AGENT

FIBRETECH GB 200g PLAIN WEAVE GLASS CLOTH

FIBRETECH GB COLOURING PIGMENT

FIBRETECH GB ½” AND 1” EPOXY BRUSHES

FIBRETECH GB THIXOTROPIC AGENT (THIS TURNS EPOXY RESIN INTO A GEL COAT)

MIXING POTS AND STIRING STICKS

PROTECTIVE GLOVES AND DUST MASK

COTTON CLOTH FOR APPLING AND BUFFING THE WAX RELEASE AGENT.

 

TAKE THE ABS COWL AND WASH WITH SOAPY WATER THEN DRY.

 REINFORCE THE INSIDE OF THE ABS PLASTIC COWL WITH PLY WOOD BRACES THIS WILL MAINTAIN THE COWLS SHAPE WHISLT MOULDING.

APPLY THE FIBRETECH GB WAX RELEASE AGENT WITH A SOFT COTTON CLOTH TO THE OUTSIDE OF THE ABS COWL. ALLOW TO AIR DRY (40 MINUTES). BEFORE BUFFING THE ABS COWL, REPEAT THIS PROCESS 10 TIMES BUFFING BETWEEN COATS.

MEASURE OUT A SMALL QUANTITY OF FIBRETECH GB EPOXY RESIN AND HARDENER FOWOLLING THE INSTRUCTIONS ON BOTH CONTAINERS, APPROX. 25ml TO 40ml.

THEN ADD THE COLOURING PIGMENT (5%) IF REQUIRED AND STIR WELL

 

NOW ADD THE FIBRETECH GB THIXOTROPIC AGENT TO THICKEN THE MIX AS DESIRED STIR WELL, ADD MORE UNTIL THE STIRRING STICK STANDS UPRIGHT. THIS MIXTURE IS CALLED GEL COAT.

 

NOW USING A BRUSH APPLY THIS MIXTURE TO THE ABS COWL ON TOP OF THE WAX RELEASE AGENT ABOUT 2 –3 mm THICK ALL OVER. DO NOT WORRY IF THE GEL COAT LEAVES A BUMPY SURFACE AT THIS STAGE AS IT WILL REFLECT A SMOOTH FINISH ON THE INSIDE OF THE MOULD.

ALLOW THIS TO PARTIALLY CURE REMAINING A LITTLE BIT TACKY (BETWEEN 1 TO 6 HOURS DEPENDING ON WHICH HARDENER IS USED.)

 

CUT 2” WIDE STRIPS OF THE GLASS CLOTH OF A SUITABLE LENGTH

 

MIX A FURTHER QUANTITY OF FIBRETECH GB EPOXY RESIN AND HARDENER FOLLOWING THE INSTRUCTIONS ON BOTH CONTAINERS. BRUSH A THIN COATING OF THE ACTIVATED RESIN ON TOP OF THE PARTIALLY CURED GEL COAT AND THEN LAY THE STRIPS OF GLASS CLOTH OVER LAPPING  EACH OTHER (10mm) WORKING FROM ONE SIDE ALL THE WAY ROUND UNTIL COMPLETE.

 

A PIECE OF CARD OR SIMILAR COULD BE USED TO KEEP THE CLOTH FIRMLY IN POSITION AROUND AWKWARD ANGLES IF REQUIRED. THE CLOTH NEEDS TO BE PROPERLY IN CONTACT IN ALL AREAS.

 

AGAIN ALLOW TO PARTIALLY CURE REMAINING A LITTLE TACKY (BETWEEN 1 TO 6 HOURS DEPENDING ON WHICH HARDENER IS USED.)

 

THEN  REPEAT THE PROCESS AS BEFORE TO BUILD UP A TOTAL OF 3 LAYERS OF GLASS CLOTH AND ACTIVATED FIBRETECH GB EPOXY RESIN.

 

ALLOW 24 HOURS BEFORE REMOVING THE ABS COWL FROM THE MOULD. YOU CAN USE A PIECE OF PLASTIC SUCH AS A OLD CREDIT CARD TO RUN AROUND INSIDE THE MOULD TO SEPARATE THE ABS COWL FROM THE MOULD.

TRIM OFF ANY UNWANTED GLASS CLOTH

(CAUTION AVOID INHALING PARTICLES OR GLASS CLOTH DUST)

 
 

PRODUCING A GLASS FIBRE COWL FROM A GLASS FIBRE FEMALE MOULD

 

APPLY THE FIBRETECH GB WAX RELEASE AGENT WITH A SOFT COTTON CLOTH TO THE INSIDE OF THE GLASS FIBRE COWL MOULD AND ALLOW TO AIR DRY (40 MINUTES). BEFORE BUFFING THE MOULD REPEAT THIS PROCESS 10 TIMES BUFFING BETWEEN COATS.

 

MEASURE OUT A SMALL QUANTITY OF FIBRETECH GB EPOXY RESIN AND HARDENER FOLLOWING THE INSTRUCTIONS ON BOTH CONTAINERS (APPROX 25ml TO 40ml).

THEN ADD COLOURING PIGMENT (5%) IF REQUIRED AND STIR WELL.


NOW ADD THE FIBRETECH GB THIXOTROPIC AGENT TO THICKEN THE MIX AS DESIRED STIR WELL, ADD MORE UNTIL THE STIRRING STICK STANDS UP RIGHT. THIS MIXTURE IS CALLED GEL COAT.

THESE STEPS ALL AS ABOVE

NOW USING A BRUSH APPLY THIS MIXTURE TO THE INSIDE OF THE MOULD ON TOP OF THE WAX RELEASE AGENT ABOUT 1–2 mm THICK ALL OVER. DO NOT WORRY IF THE GEL COAT LEAVES A BUMPY SURFACE AT THIS STAGE AS IT WILL REFLECT A SMOOTH FINISH ON THE INSIDE OF THE MOULD.

ALLOW TO PARTIALLY CURE REMAINING A LITTLE TACKY (BETWEEN 1 TO 6 HOURS DEPENDING ON WHICH HARDENER IS USED.)

 

CUT 2” WIDTH STRIPS OF THE GLASS CLOTH OF APPROPRIATE LENGTH.

 

MIX A FURTHER QUANTITY OF FIBRETECH GB EPOXY RESIN AND HARDENER FOLLOWING THE INSTRUCTIONS ON BOTH CONTAINERS. BRUSH A THIN COATING OF THE ACTIVATED RESIN ON TOP OF THE PARTIALLY CURED GEL COAT AND THEN LAY THE STRIPS OF GLASS CLOTH OVER LAPPING EACH OTHER (10mm)  WORKING FROM ONE SIDE ALL THE WAY ROUND.

 

 
NOW REPEAT THE PROCESS AS BEFORE TO BUILD UP A TOTAL OF 2 LAYERS OF GLASS CLOTH AND FIBRETECH GB EPOXY RESIN AND HARDENER.

ALLOW 24 HOURS BEFORE REMOVING THE COWL FROM THE MOULD. YOU CAN USE A PIECE OF PLASTIC SUCH AS AN OLD CREDIT CARD TO RUN AROUND INSIDE THE MOULD TO SEPARATE THE GLASS FIBRE COWL FROM THE MOULD.

 

TRIM OFF ANY UNWANTED GLASS CLOTH

(CAUTION AVOID INHALING GLASS FIBRE PARTICLES OR DUST)

 

THE COWL CAN BE CLEANED WITH HOT SOAPY WATER AND SPRAY PAINT CAN BE APPLIED TO THE FINISHED COWL.