Attaching MLV and CCF to the Vehicle

Fully Assembled - MLV.CCF mounted with Velcro Strips

A layer of MLV decoupled from the sheet metal with a layer of CCF, fastened to the sheet metal using high temperature, vinyl compatible Velcro® Strips.

Everything is removable,and adjustable. The Velcro® Strips add no extra thickness to the stack.

It doesn't matter if you cut the MLV to fit first and use that as a template for the CCF or start with CCF and trace that onto the MLV. CCF is more flexible and formable so it can be easier to fit into tight spaces.

High temperature,vinyl compatible Velcro® Strips ship as 2"x4" pieces. You will almost always cut them into 2" squares for use. Peel the release film off of one side and press the pieces of Velcro into place.

High temperature,vinyl compatible Velcro® Strips ship as 2"x4" pieces. You will almost always cut them into 2" squares for use. Peel the release film off of one side and press the pieces of Velcro into place.

Remove the release film from the Velcro® Strips and press into place. 

Separate the Velcro® hook and loop sides and remove the MLV. While you are doing this, apply extra pressure to all of the Velcro® pieces to make sure they are fully bonded, with no air bubbles. The adhesive is very strong as soon as you mount but its bond strength increase over the first 24 hours.

Remove the MLV from the vehicle. Lay it Velcro® side up on a flat work surface.

If  you don't already have a matching piece of CCF cut, use the MLV as a template, mark and cut the CCF. Lay the CCF on top of the MLV. Feel the Velcro® Strips through the CCF and mark their outline. Marking the corners is really enough.

* We used grey CCF in the past (shown in the photos). We've switched to black. Use the same metalic marker or soft pencil you use to mark the MLV for the CCF.

Cut holes in the CCF for the Velcro® to come through. Cut them a little larger than your markings. You want there to be no CCF overlapping the Velcro®. Final step is to use HH-66 Vinyl Contact Cement to tack the CCF to the MLV. A few one inch circles is enough. The heavy MLV is attached to the vehicle directly so we are only concerned with holding the CCF in place.

HH-66 is a contact cement. You need to apply it to both surfaces, let it get tacky (1-3 minutes or so) and then press them together. The easiest and fastest way to do this is a piece at a time. The illustrated piece was done in two steps. Put a weight on one side to keep it in place. Fold the unweighted side of the CCF back. Apply globs of HH-66 to the MLV. Press the CCF into the MLV and HH-66 to transfer some of the HH-66 to the CCF. Separate the two until the HH-66 just turns matte. Press back together and repeat on the other side. This gets easier as you go. With a little practice you can assembly line pieces and knock them out very quickly.

That's all there is to it. We've built a barrier composite that will stay in palce as long as we want it to, can be removed and replaced without damage and makes no irreversible changes to the vehicle.

Products Used: 
Mass Loaded Vinyl (MLV)
Closed Cell Foam (CCF)
HH-66 Vinyl Contact Cement
Velcro® Strips
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