How To Create a Vacuum Bag Using EZ~Spray™ Silicone 20


EZ~Spray™ Silicone 20 Spray Rubber is made especially for dispensing through the EZ~Spray™ Jr. Spray Gun, this silicone is softer (Shore 20A) and stronger vs. our original EZ~Spray™ Silicone.

Based on our Dragon Skin™ silicone technology, this spray rubber is an exceptional mold material and offers higher physical properties than our original EZ~Spray™ Silicone rubber (we will continue to offer EZ~Spray™ silicone rubber, renamed EZ~Spray™ Silicone 35).

EZ~Spray™ Silicone 20 is also good for making custom spray vacuum bags and offers several advantages over vacuum bags made using conventional methods. EZ~Spray Silicone 20 bags conform perfectly to your tool, meaning perfect parts every time. Silicone vacuum bags are also virtually indestructible and stand up to high temperatures. Perfect for pre-preg, wet-preg and infusion processing. One of the biggest advantages, due to the fact that silicone bags are re-usable, is the time and labor savings realized if there are more than 6 parts to be made - up to 80% savings vs. conventional vacuum bags.

Materials Used in this Tutorial

  • EZ~Spray Silicone 20
  • EZ~Spray Jr. Spray Gun

Step 1: Making Vacuum Bag

Spray the EZ~Spray™ Silicone 20 over the tool and remove the cured vacuum bag.

Step 2: Preparing the Bag

Lay up the composite material and reposition the vacuum bag.

Step 3: Casting and Finishing

Use the vacuum to create the part. The finished composite hood created by Vermont SportsCar Rallying -