What is the difference between the self-leveling and non-sag versions?

Self-leveling flows out flat over horizontal surfaces such as roof seams, vents and skylights. Non-sag holds its shape on slanted and vertical surfaces so it does not run.

Which roofs does it work on?

It is made for rubber, metal and fiberglass RV roofs.

Yes, once the sealant has cured.

Is clear available in the non-sag formula?

No. Clear is listed only with the self-leveling formula; the non-sag version comes in white, black, gray and beige.

What about sealing window and door frames?

Lippert points to Alphathane 5160 adhesive sealant for window and door frames rather than this lap sealant.

Where is the Lippert Alpha 1021 RV Lap Sealant cheapest?

At The RV Surplus LLC, for $28.99, as of our latest check.

Lippert Alpha 1021 RV Lap Sealant

Best price now

$28.99at The RV Surplus LLCChecked Nov 9

Prices are checked against each store and labelled with when.

Visit The RV Surplus LLC

Lippert discount code →

Lippert Alpha 1021 RV Lap Sealant

Best price now

$28.99at The RV Surplus LLCChecked Nov 9

Prices are checked against each store and labelled with when.

Visit The RV Surplus LLC

Lippert discount code →

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Price facts

Last seen at $28.99 at The RV Surplus LLC on Nov 9.

Our take on the Lippert Alpha 1021 RV Lap Sealant

Alpha Systems 1021 is a lap sealant for RV roofs, sold in a self-leveling formula for horizontal seams, vents, antennas and skylights and a non-sag formula that holds a bead on slanted and vertical surfaces. It bonds to rubber, metal and fiberglass roofs, is low VOC, and can be painted once cured. It is the sealant Lippert says its own plants use, and it is built to take road shock and vibration. A 1/4-inch bead covers about 30 linear feet, so one 10.3 oz cartridge handles a typical vent or skylight reseal with some left over.

Best forRV owners resealing roof seams, vents and skylightsRubber, metal or fiberglass roof repairsVertical and slanted surface sealing with the non-sag formulaDo-it-yourself roof maintenance

Pros

Self-leveling formula spreads evenly over horizontal seams
Non-sag version holds its bead on vertical and slanted surfaces
Bonds to rubber, metal and fiberglass roofs
Paintable once cured
Low VOC
About 30 linear feet of coverage per 1/4-inch bead

Cons

Clear is offered only in the self-leveling formula
Two formulas means matching the right one to the surface
Coverage drops with a wider bead
Cured sealant must be recoated as it ages, like any lap sealant

Lippert Alpha 1021 RV Lap Sealant prices at every store

The RV Surplus LLCNew
In stockReturn policy
$28.99Checked Nov 9
Visit The RV Surplus LLC

About the Lippert Alpha 1021 RV Lap Sealant

Alpha Systems 1021 is a lap sealant for RV roofs. It seals seams, vents, antennas and skylights on rubber, metal or fiberglass roofs.

The self-leveling formula flows out over horizontal surfaces. The non-sag formula holds its bead on slanted and vertical surfaces.

It is low VOC and withstands all weather. It is formulated to hold up to road shock and vibration, and it can be painted once cured.

Brand: Lippert
Size: 10.3 oz cartridge
Coverage: A 1/4" bead covers about 30 linear feet
Formulas: Self-leveling (horizontal surfaces); non-sag (vertical and slanted surfaces)
Colors: Self-leveling: white, black, gray, beige, clear. Non-sag: white, black, gray, beige
Roof types: Rubber, metal, fiberglass
Use on: Horizontal roof seams, vents, antennas, skylights
VOC: Low VOC
Finish: Paintable once cured

Questions and answers

What is the difference between the self-leveling and non-sag versions?: Self-leveling flows out flat over horizontal surfaces such as roof seams, vents and skylights. Non-sag holds its shape on slanted and vertical surfaces so it does not run.
Which roofs does it work on?: It is made for rubber, metal and fiberglass RV roofs.
Can it be painted?: Yes, once the sealant has cured.
How far does one cartridge go?: A 1/4-inch bead covers about 30 linear feet.
Is clear available in the non-sag formula?: No. Clear is listed only with the self-leveling formula; the non-sag version comes in white, black, gray and beige.
What about sealing window and door frames?: Lippert points to Alphathane 5160 adhesive sealant for window and door frames rather than this lap sealant.
Where is the Lippert Alpha 1021 RV Lap Sealant cheapest?: At The RV Surplus LLC, for $28.99, as of our latest check.