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Dicor 501LSW-1 Lap Sealant vs Dicor 501LSG Self Leveling Lap Sealant

Both are the same Dicor self-leveling lap sealant in a 10.3 oz tube; the only real difference is color. Buy the white 501LSW-1 for white EPDM or white TPO membranes, and the gray 501LSG-1 for gray roofs or where a gray bead blends in. Owners and reviewers rate this formula highly for sealing vents, pipes and screw heads on horizontal RV roof surfaces, and it skins over in minutes and waterproofs within hours. Neither is a vertical-surface caulk, so use a non-leveling sealant on sidewalls.

  • Choose the Dicor 501LSW-1 if your RV roof membrane or trim is white and you want the bead to match.
  • Choose the Dicor 501LSG-1 if your roof is gray or you prefer a gray bead that hides dirt and discoloration.

Prices

  • Dicor 501LSW-1 Lap Sealant: $26.90 at Walmart (last seen Nov 10)
  • Dicor 501LSG Self Leveling Lap Sealant: $16.60 at FixTimber (last seen Nov 9)
  • Difference: the Dicor 501LSG Self Leveling Lap Sealant is $10.30 cheaper than the Dicor 501LSW-1 Lap Sealant at the latest prices (Nov 9 and Nov 10)
RV Wholesale Direct
Dicor 501LSW-1 Lap Sealant Self-Leveling

Dicor 501LSW-1 Lap Sealant

Dicor 501LSW-1 Lap Sealant Self-Leveling

4.8(5 ratings)
$26.90at WalmartChecked 13 h ago
See all prices and details
Visit Walmart
Pros
  • White matches white EPDM and TPO roofs
  • Self-levels into a smooth bead on horizontal surfaces
  • Sticks to metal, wood, fiberglass and concrete
  • UV stabilized and will not stain the membrane
Cons
  • White shows dirt and streaks faster
  • Not for vertical or sloped surfaces
  • One tube covers only a short run of seams
Dicor
Dicor 501LSG-1 Self Leveling Lap Sealant

Dicor 501LSG Self Leveling Lap Sealant

Dicor 501LSG-1 Self Leveling Lap Sealant

4.7(17 ratings)
$16.60at FixTimberChecked Nov 9
See all prices and details
Visit FixTimber
Pros
  • Gray hides dirt and discoloration better
  • Same proven Dicor formula and adhesion
  • Self-levels cleanly around vents and screw heads
  • Rated 4.7 out of 5 by owners
Cons
  • Gray stands out on a white roof
  • Not for vertical or sloped surfaces
  • Needs a dry, clean surface to bond well

What separates them

Dicor 501LSW-1 Lap SealantDicor 501LSG Self Leveling Lap Sealant
ColorWhiteGray
Roof membrane matchBlends with white EPDM and white TPOBlends with gray EPDM and gray TPO
Dirt and discolorationShows dark streaks soonerHides dirt better over time
Tube size10.3 oz10.3 oz
ApplicationSelf-leveling, horizontal surfaces onlySelf-leveling, horizontal surfaces only
AdhesionAluminum, mortar, wood, vinyl, galvanized metal, fiberglass, concreteAluminum, mortar, wood, vinyl, galvanized metal, fiberglass, concrete
UV stabilityUV stabilized, will not stain roofingUV stabilized, will not stain roofing
CureSkins in about 5 minutes, waterproof in about 4 hoursSame formula and cure behavior

Price history

$27.00$10.00
Nov 9Nov 11
  • Dicor 501LSW-1 Lap Sealant: lowest $27.00 on Nov 11 at Amazon.
  • Dicor 501LSG Self Leveling Lap Sealant: lowest $10.00 on Nov 11 at RVupgrades.com.

Prices at every store

Dicor 501LSW-1 Lap Sealant

  • WalmartNew

    In stockSold by Coastal Marine And Trailer IncReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $26.90Free shippingChecked 13 h ago
    Visit Walmart
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $27.00Free shippingChecked 13 h ago
    Visit Amazon
All 2 stores and price history →

Dicor 501LSG Self Leveling Lap Sealant

  • FixTimberNew

    In stockReturn policy

    $16.60Checked Nov 9
    Visit FixTimber
  • PatchroNew

    In stockReturn policy

    $18.70Checked Nov 9
    Visit Patchro
  • WalmartNew

    In stockSold by Boating StoreReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $19.99+ $5.99 shippingChecked 13 h ago
    Visit Walmart
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $19.99Free shippingChecked 13 h ago
    Visit Amazon

Also available at

  • CampingworldCheck price at Campingworld
  • DB Marine SuppliesCheck price at DB Marine Supplies
  • RVupgrades.comCheck price at RVupgrades.com
All 7 stores and price history →

Specs compared

SpecDicor 501LSW-1 Lap SealantDicor 501LSG Self Leveling Lap Sealant
colorWhiteGray
size10.3 oz10.3 oz
Full cure time24 Hours—
Liquid volume0.3 Liters—
Product dimensions11.25 x 2 x 2 inches—
Unit count61.8 Fluid Ounces—
Item weight—10.3 ounces
Item dimensions—11.2 x 0.8 x 2 inches
Material—Silicone
Style—Self-Leveling
Item form—Liquid
Compatible material—Concrete, Metal, Wood
Show all 14 specsShow fewer specs
SpecDicor 501LSW-1 Lap SealantDicor 501LSG Self Leveling Lap Sealant
Tube size—10.3 fl. oz.
Country of origin—China

What reviewers say

Dicor 501LSW-1 Lap Sealant

RV owners treat this as the standard lap sealant for rubber roofs and report it flows out evenly and holds up through weather. Complaints center on cold-weather thickness, the long full-cure time and mess when applied too heavily.

What people mention
  • ApplicationPraisedOwners say it flows out and levels smoothly on horizontal roof surfaces.
  • AdhesionPraisedReviewers report it bonds firmly to EPDM and TPO membrane and stays put.
  • Cold weatherCriticisedIn cold temperatures it turns thick and needs warming before it will gun easily.
  • Cure timeMixedIt skins fast and turns waterproof within hours, but full cure takes up to a month.

Dicor 501LSG Self Leveling Lap Sealant

  • 4.7 / 517 ratings

Owners rate it highly and describe it as the go-to lap sealant for RV roof repairs. They report it flows out smoothly, levels flat and holds up in sun and weather. Complaints center on it running on slopes and on tubes emptying faster than expected.

What people mention
  • LevelingPraisedOwners say it flows out and flattens into a smooth bead without tooling.
  • AdhesionPraisedReviewers report it bonds firmly to EPDM and TPO membranes and to metal fittings.
  • Weather resistancePraisedUsers say sealed seams hold up through sun and rain without cracking.

Questions and answers

Is the white or gray version better?
Only the color differs. Match your roof membrane: white for white EPDM or TPO, gray for gray roofs or if you want to hide dirt.
Can I use this on a vertical sidewall?
No. This is self-leveling and runs on slopes. Use a non-leveling lap sealant on vertical surfaces.
How long does it take to cure?
It skins over in about 5 minutes and is waterproof in about 4 hours in 50 to 70 degree weather. Full cure takes up to 30 days.
Does it work on TPO and PVC roofs?
It is compatible with EPDM and TPO. Check the membrane maker's guidance before using it on PVC.
How much does one tube cover?
A 10.3 oz tube lays a bead along seams, vents and screw heads. Buy several tubes for a full roof reseal.

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More comparisons

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  • Aiqeek 2 Packs RV Roof Sealant, Self Leveling Lap Sealant White for RV Caulking for Roof, Repair, UV resistant & Waterproof, 10.5 fl oz vs Dicor 501LSG-1 Self Leveling Lap Sealant

Buying guides that pick them

  • Best RV roof sealants for self-application
  • Vertical useCriticisedBuyers report it sags and runs on sloped or vertical surfaces.