2-Component SIP

Information 

Use the primer within 8 hours. Apply a thin, even coat to the bonded flanges and remove excess primer. Protect surfaces you have already primed from dirt and soiling. Otherwise, the bonded joint may be defective.

Information 

• Primed surfaces can be exposed for up to 3 days before undergoing further processing. 
• Make sure that the surfaces are not contaminated by environmental influences. 
• If the primer is left exposed for more than 3 days, it must be removed and re-applied. 
• For the reasons specified above, we recommend that body parts are bonded immediately after applying the primer. 

1. Prepare bonded flanges for bonding. (See WM 5X00IN WORKING WITH BODY STRUCTURAL ADHESIVE 
2. Open bottle for component A.
   Fig 1: Opening Bottle For Component A

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3. Fill bottle completely with component B.
   Fig 2: Filling Bottle With Component B

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4. Screw on spray head.
   Fig 3: Screwing On Spray Head

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5. Mix components together by shaking vigorously.
   Fig 4: Mixing Components In Bottle

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6. Clean adhesive flange with isopropanol and allow it to flash off.
7. Spray on primer in the area around the adhesive flange.
   1. 7.1. Process mixed primer within eight hours; do not keep any leftover primer.
      Fig 5: Spraying Primer In Area Around Adhesive Flange

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      Fig 6: Calculating Working Time Of 2-Component Sip

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8. Check primer application.

   Bonded flanges are coated evenly with primer:

   result is OK.

   Fig 7: Correct Primer Application Area

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   Remove excess primer with a clean, dry cloth.

   A thin, violet-coloured coating of primer is sufficient for the bonded flanges.

   Fig 8: Removing Excess Primer

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   Adhesive flanges are not evenly coated (droplet formation):

   result is not OK.

   Using wet-sandpaper (approx. 200 grain) or abrasive fabric, rub in the primer film while it is still damp on the flange area until an even application of primer is obtained.

   If an even application of primer is not obtained, the bonded flange must be completely cleaned, sanded and primed once again.

   Fig 9: Incorrect Primer Application Area

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9. Dry primer.
   1. 9.1. Allow primer to flash off; it must be dust-dry before any adhesive is applied.

   Location	Description	Type	Basic value	Tolerance 1	Tolerance 2
   Primer		Flash-off time	5 min

10. Process adhesive.