Adhesives & Coatings · My build kit

Great Stuff Expanding Foam Sealant

Expanding foam is among the materials I bought while preparing the van interior. My diary starts that preparation with sweeping, mopping and removing stubborn residue from the floor before covering surfaces.

By · Camper Van Freedom

Read my build notes ↓

The Item in My Kit

I bought Great Stuff Expanding Foam Sealant as part of my camper van equipment.

Expanding foam is among the materials I bought while preparing the van interior. My diary starts that preparation with sweeping, mopping and removing stubborn residue from the floor before covering surfaces.

Keeping Expanding Foam Separate from Sheet Insulation

  1. I swept the cargo area and followed with a mop and floor-cleaner spray.
  2. I used wire-brush and nylon-brush drill attachments on the residue that remained.
  3. I dried the cleaned floor with a towel before the later interior layers.
Removing stuck-on residue during the floor cleanup.
Removing stuck-on residue during the floor cleanup.
The cargo floor during my preparation session before sound deadening.
The cargo floor during my preparation session before sound deadening.

My Takeaway from This Job

These products dispense expanding foam from handheld cans, while the sheet and roll insulation in my kit use another material format. Great Stuff, Big Gaps and Gaps & Cracks remain separate formulations within the can-and-nozzle group.

Product Details And Van-Build Uses

SpecificationProduct Detail
Purchased productGreat Stuff 157911
Listed size20 oz
FormatExpanding insulating foam

Expanding foam fills a small opening by growing after it is dispensed. That makes the amount applied different from filling a joint with a non-expanding paste. Before closing a van interior, identify the accessible gaps individually and arrange the applicator so the bead can be controlled. Leave room for expansion and allow the foam to cure before trimming. Foam gap filling, sheet insulation and mechanical panel attachment are separate parts of the interior preparation plan.

Read Great Stuff Gap-Filling Product Guidance

Related Material: White Paintable Sealant in My Build Supplies

Why Leave Space For Expansion?

The foam increases in volume after dispensing. Filling an opening completely at the start leaves excess material to expand beyond the intended area.

Alternative products

Two Alternatives to Compare

Loctite offers separate Big Gaps and Gaps & Cracks formulations; both retain the handheld can-and-nozzle format rather than a sheet insulation format.

ProductWhat distinguishes itPurchase link
Great Stuff Expanding Foam SealantGreat Stuff ivory twenty-ounce foam canView on Amazon
Loctite Tite Foam Big Gaps (alternative)Loctite Big Gaps foam canView on Amazon
Loctite Tite Foam Gaps & Cracks (alternative)Loctite Gaps & Cracks foam canView on Amazon
Loctite Tite Foam Big Gaps

Loctite Tite Foam Big Gaps

This polyurethane foam sealant expands after dispensing from its handheld can. A narrow applicator tube directs the foam into gaps.

View on Amazon
Loctite Tite Foam Gaps & Cracks

Loctite Tite Foam Gaps & Cracks

This expanding foam fills gaps and cracks around building materials. The can’s applicator directs the foam into small openings before it cures.

View on Amazon

Questions from My Build

What Did I Do Before the Sound-Deadening Stage?

I swept, washed, brushed and dried the cargo-area surfaces.

Where Do the Floor Photos Come From?

They are stills from my recorded floor-preparation work.

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