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Frost King Duct Insulation Foil and Foam Roll vs YCMYRYP Aluminum Foil Insulation Roll

Buy the Frost King for ducts, pipes and any fixed home HVAC job. Its foil-fiberglass wrap is rated R-3.0 and handles -10 °F to 250 °F, so it holds up where a duct runs hot or cold. The YCMYRYP roll is thicker foam-backed foil aimed at cars and RVs, with no stated R-value and no temperature rating. Owners of foil-fiberglass duct wrap generally report it works but sheds fibers and needs gloves and foil tape; foam rolls are easier to handle but flatten and lose loft over time.

  • Choose the Frost King if you are insulating HVAC ducts, water pipes or a water heater and want a rated R-value with a real temperature range.
  • Choose the YCMYRYP roll if you are lining a car floor, door panel or RV wall and want a thicker, cut-to-fit sheet for heat and road noise.

Prices

  • Frost King Duct Insulation Foil and Foam Roll: $25.70 at Max Warehouse (last seen Nov 11)
  • YCMYRYP Aluminum Foil Insulation Roll: $28.42 at Mmalto Tools (last seen Nov 11)
  • Difference: the Frost King Duct Insulation Foil and Foam Roll is $2.72 cheaper than the YCMYRYP Aluminum Foil Insulation Roll at the latest prices (Nov 11)
Frost King
Frost King Duct Insulation Self Adhesive Foil and Foam 12 W x 1/8 Thick in. x 15 L ft.

Frost King Duct Insulation Foil and Foam Roll

Frost King Duct Insulation Self Adhesive Foil and Foam 12 W x 1/8 Thick in. x 15 L ft.

5(2 ratings)
$25.70at Max WarehouseChecked Nov 11
See all prices and details
Visit Max Warehouse
Pros
  • Rated R-3.0 for real duct and pipe insulation
  • Wide -10 °F to 250 °F range
  • Long 15 ft roll in a 12 in width covers duct runs
  • Foil facing resists moisture
  • Works on pipes up to 1 in and water heaters
Cons
  • Fiberglass sheds and irritates skin; gloves and a mask needed
  • Only 1/8 in thick, so modest R-value
  • Specs list self-sealing as no, so seams need foil tape
  • Short 15 ft length per roll
S
Self-Adhesive Aluminum Foil Insulation Roll for Cars & RVs

YCMYRYP Aluminum Foil Insulation Roll

Self-Adhesive Aluminum Foil Insulation Roll for Cars & RVs

5(6 ratings)
$28.42at Mmalto ToolsChecked Nov 11
See all prices and details
Visit Mmalto Tools
Pros
  • Thicker 5 mm foam adds padding and some sound damping
  • Cuts and shapes easily to curves and panels
  • Claimed 97% radiant heat reflection
  • Flame-retardant and moisture-proof facing
  • Suited to car and RV interiors
Cons
  • No R-value or temperature rating given
  • One small sheet, about 1 x 2 m
  • Foam core can compress and lose performance
  • Little track record as a brand

What separates them

Frost King Duct Insulation Foil and Foam RollYCMYRYP Aluminum Foil Insulation Roll
R-valueR-3.0 statedNot stated; only 97% radiant reflection claimed
Thickness1/8 in foil-faced fiberglass5 mm (about 3/16 in) foam
Temperature rangeRated -10 °F to 250 °FNo temperature rating; flame-retardant claim only
Roll size12 in wide x 15 ft long, 4 rolls per packAbout 3.28 x 3.56 ft (1 x 2 m), one sheet
Best surfaceDucts, pipes up to 1 in, water heatersCar floors, roofs, door panels, RV walls
AdhesiveSelf-adhesive backing; specs also list self-sealing as no, so tape the seamsSelf-adhesive backing
HandlingFiberglass; wear gloves and a mask, edges frayFoam core; cleaner to cut, can compress
Moisture and moldFoil facing resists moistureMoisture-proof foil facing

Prices at every store

Frost King Duct Insulation Foil and Foam Roll

  • Max WarehouseNew

    In stockReturn policy

    $25.70Checked Nov 11
    Visit Max Warehouse
Prices and history →

YCMYRYP Aluminum Foil Insulation Roll

  • Mmalto ToolsNew

    In stockReturn policy

    $28.42Checked Nov 11
    Visit Mmalto Tools
  • MMAltoNew

    In stockReturn policy

    $32.80Checked Nov 11
    Visit MMAlto
All 2 stores and price history →

Specs compared

SpecFrost King Duct Insulation Foil and Foam RollYCMYRYP Aluminum Foil Insulation Roll
Thickness1/8 in5mm
Length15 ft—
Width12 in—
MaterialAluminum—
R-Value3.0—
Package Quantity4—
Dimensions1 ft x 1/8" x 15 ft—
Item Weight0.200—
Roll size—3.28x3.56ft(1x2m)
Radiant heat reflection—up to 97%
Adhesive backing—self-adhesive
Surface material—aluminum foil
Show all 16 specsShow fewer specs
SpecFrost King Duct Insulation Foil and Foam RollYCMYRYP Aluminum Foil Insulation Roll
Fire resistance—flame-retardant
Moisture resistance—moisture-proof
Brand—YCMYRYP
Number of items—1

What reviewers say

Frost King Duct Insulation Foil and Foam Roll

Buyers who mention it mostly praise the sound protection it adds around ductwork. Feedback on thermal performance is thinner, and the low R-value and narrow width are the usual limits cited.

What people mention
  • Sound dampeningPraisedBuyers say it noticeably quiets rattling and airflow noise from metal ducts.
  • AdhesiveMixedThe self-stick backing is convenient, but it holds best on clean, dry surfaces.
  • Thermal valueCriticisedThe 1/8-inch foam gives only about R-3, so it slows heat loss rather than stopping it.
  • WidthCriticisedAt 12 inches wide, larger ducts need multiple overlapping wraps and more seams.

Questions and answers

Which is better for insulating HVAC ducts?
The Frost King. It has a stated R-3.0 and a 250 °F maximum, which suits warm duct runs. The YCMYRYP roll gives no R-value or temperature rating, so it is a poor fit for ducts.
Which works better in a car or RV?
The YCMYRYP roll. Its 5 mm foam is thicker, cuts to fit panels and floors, and is sold for vehicle use. Frost King's fiberglass wrap is meant for ducts and pipes, not interiors.
Which lasts longer?
Foil-faced fiberglass holds its shape and rating for years if taped and kept dry. Foam rolls can compress or crumble over time, especially in hot or high-traffic spots.
Is the thicker roll worth stepping up to?
Only for vehicle and panel work. For ducts and pipes, thickness without a rated R-value does not replace the Frost King's stated performance.
Can I use either on hot water pipes?
Frost King is rated to 250 °F and lists pipes up to 1 in. The YCMYRYP roll has no temperature rating, so do not wrap hot pipes with it.
Do I need extra tape?
Yes for the Frost King: its specs list self-sealing as no, so seal seams with foil tape. The YCMYRYP sheet is self-adhesive but benefits from taped edges.

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