Home » ARMACELL: Armaflex Refrigerant Line Insulation | Montréal, Laval, Longueuil, South Shore and North Shore
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Armacell · ArmaflexThe Armacell space at AirGreenArmacell’s Armaflex insulation for refrigerant lines, tube, roll, sheet, tape and 520 adhesive, offered on quotation by AirGreen in Montréal, Laval, Longueuil, the South Shore and the North Shore.
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Armacell · Sources checked October 27, 2026

Armacell Armaflex insulation: a refrigerant line kept dry, from the first joint to the last

A closed-cell elastomeric foam made since 1954, by Armstrong and then by Armacell. On a heat pump line, five products do the job: the 6 ft tube, the joint-free roll, the sheet, the tape and the 520 adhesive. The technical figures on this page come from Armacell’s own data sheets, with their date.

Find the right pieceCount my joints
Five pieces, one line
Follow the line from the outdoor unit to the wall-mounted head
12345

6 ft tube On straight, accessible runs: it slides over the copper one length after another, every joint glued with 520.

-183 to 105 °Ctube service range (3/8 to 1 in walls), -297 to 220 °F
0.05 perm-inwater vapour permeability (ASTM E96)
25/50flame and smoke, ASTM E84 and CAN/ULC S102, through 1 in wall
4 °Cminimum application temperature of the 520 adhesive (40 °F)
AirGreen × ArmacellArmaflexClosed cells0.05 perm-in25/50 · CAN/ULC S102520 adhesiveMontréal · Laval · Longueuil · South Shore · North Shore
01 · The right piece

Three questions, and the piece that goes on your line

Tell us the pipe size, what you are insulating and where: the tool returns the product, the walls offered, each variant’s code and what Armacell says about it.

Copper tube size (that is the insulation size)
What you are insulating
Where

The insulation size is the size of the copper tube it covers. On a wall-mounted heat pump the suction line is often 3/8, 1/2 or 5/8 in and the liquid line 1/4 or 3/8 in: check the unit’s manual.

Result
Armaflex 6 ft tube insulation
In the shop
Walls offered for pipe size 3/8 in
  • 6 ft (1.8 m) lengths, slid over the copper without stretching
  • k-value 0.245 Btu·in/(h·ft²·°F) at 75 °F for 3/8 to 1 in walls
  • Service range -297 °F (-183 °C) to 220 °F (105 °C)
  • Water vapour permeability 0.05 perm-in; 25/50 flame/smoke and CAN/ULC S102 through 1 in wall
  • Armacell publishes no thickness table by climate (it points to its ArmaWin software): the wall is chosen on site, by the heat pump manual. On quotation.
To add, whatever you choose
  • Armaflex 520 adhesive1/2 pint AG-IS-005011 pint AG-IS-00502See this varianton every joint, butt joints and slits; tacky in 1 to 5 min, full strength in 36 h, never below 40 °F (4 °C)
  • Armaflex foam tape 1/8 × 2 in × 30 ftAG-IS-004See this variantto finish exposed joints and small fittings after gluing; never on its own to hold a joint
  • Indoors No extra protection required by Armacell indoors; the glued joints do the job.

AirGreen codes and variants taken from the shop on October 27, 2026. Figures from Armacell’s AP/ArmaFlex data sheet (032024), tube sheet (102021) and Armaflex Coil sheet (2015); roll lengths as on our product pages (packaging). Armacell publishes no thickness table by climate: the wall is chosen on site, by the heat pump manual.

02 · Tubes or roll

How many joints on your line?

Every butt joint is a place where humid air can get in if the glue is missing. Give the length and the number of lines: the tool compares 6 ft lengths with the roll.

Line length, from the outdoor unit to the indoor unit
25 ft (7.6 m)
Lines to insulate
Pipe size

Theoretical count, without elbows or cutting losses. With a 1/2 in wall or thicker, Armacell requires mitred fitting covers in elbows.

Result
25 ft (7.6 m) × 1 line · 3/8 in
Roll: no butt joint
6 ft tubes
5lengths in total4 butt joints + 2 ends to close
Roll 155 ft
1piece in total0 butt joints + 2 ends to close

520 adhesive on every joint and at the ends: tacky in 1 to 5 minutes, full strength in 36 hours, 40 °F (4 °C) minimum when applied. Armacell only publishes a maximum coverage of 200 sq ft per gallon: the quantity is confirmed at the quote.

AirGreen × Armacell

Armacell’s insulation, picked for your line.

Armacell makes Armaflex and publishes its data sheets and installation rules. AirGreen picks with you the piece, the size and the wall that go on your refrigerant line, on quotation.

Armacell

What Armacell brings

  • ArmaFlex since 1954The inventor of flexible foam for equipment insulation; headquartered in Luxembourg, Canadian plant in Brampton.
  • Closed cellsA vapour barrier built up through the whole thickness: 0.05 perm-in, from -297 to 220 °F.
  • The installation rulesPush without pulling, glue every joint with 520, protect the foam outdoors: its manuals say so.
  • The data sheets, as publishedEvery figure on the page carries the code and date of the Armacell document.
AirGreen

What AirGreen brings

  • The right piece firstThe section 01 selector gives the product, the walls and each variant’s code.
  • The joints countedThe section 02 calculator compares 6 ft tubes and the roll, joint by joint.
  • Free quotationWe look at your line before proposing the insulation.
  • RBQ 5645-9605-01Subclasses 15.8, 15.10 and 16.

The result: insulation picked for your line, price on quotation.

Find the right pieceRequest my quotation
03 · The figures

What Armacell’s data sheets say

We only repeat the values the manufacturer publishes, with the document code. Nothing is rounded in a convenient direction.

MaterialClosed-cell elastomeric foam, NBR/PVC for walls up to 1 inTDS 032024
Service range-297 °F (-183 °C) to 220 °F (105 °C) for 3/8 to 1 in walls; below -20 °F the foam gets stiffer but keeps its propertiesTDS 032024
k-value0.245 Btu·in/(h·ft²·°F) at 75 °F (0.0353 W/m·K); 0.235 at 50 °F, 0.257 at 100 °F, 0.268 at 125 °FTDS 032024 · 102021
Water vapour permeability0.05 perm-in (ASTM E96, procedure A)TDS 032024
Water absorption0.2 % by volume at most (ASTM C209, C1763)TDS 032024
Density3 to 6 lb/ft³ (ASTM D1667)TDS 032024
Flame and smokeIndices below 25 and below 50 (ASTM E84, UL 723); CAN/ULC S102 through 1 in wall; UL 94 5VA and V-0 from 1/4 inTDS 032024 · 102021
Mould and fungiPassed UL 181; passed ASTM G21 and C1338; MICROBAN antimicrobial protectionTDS 032024
StandardASTM C534 Type I Grade 1 (tubes), Type II Grade 1 (sheets)TDS 032024
Sheet R-values1/4 in R-1.0 · 3/8 in R-1.5 · 1/2 in R-2.1 · 3/4 in R-3.1 · 1 in R-4.2TDS 032024
Tube6 ft (1.8 m) lengths; 3/8 to 2 in walls; 1/4 in (black only) to 10 in sizesTube TDS 102021
Roll (Armaflex Coil)Continuous unslit tube, 3/8 and 1/2 in walls (in the shop: 3/8 in); k 0.25 at 75 °F; 0.05 perm-inCoil 2/2015
Tape-30 °F (-34 °C) to 180 °F (82 °C); 25/50 ASTM E84 and CAN/ULC S102; for pipes and fittingsTape TDS 032020
520 adhesiveJoint holds up to 250 °F (120 °C) on tube, 180 °F (82 °C) for fully bonded sheet; applied at 40 °F (4 °C) minimum; tacky in 1 to 5 min; full strength in 36 h; 200 sq ft per gallon at most; VOC 615 g/l; flash point below 20 °F (-7 °C); 1.5-year shelf life520 TDS 082018

The five Armacell products in the shop

6 ft tube6 ft tubeTwelve sizes, three walls (3/8, 1/2, 3/4 in). The basic product of any line.See the productRoll, 3/8 in wallRoll, 3/8 in wallSix sizes in the shop, 95 to 175 ft depending on the packaging: a long line without a joint.See the product36 × 48 in sheet36 × 48 in sheetFive thicknesses, 1/4 to 1 in (R-1.0 to R-4.2), for valves and fittings.See the product1/8 × 2 in × 30 ft tape1/8 × 2 in × 30 ft tapeSelf-adhesive foam tape to finish joints and fittings (Armacell TAP18230).See the product520 adhesive520 adhesiveHalf pint or pint, brush-top. The contact adhesive Armacell specifies for its joints.See the product
Why Armacell insists on closed cells. On its page on insulating refrigeration equipment, Armacell sums up the stake: prevent condensation by keeping the insulation surface above the dew point. Its vapour barrier, it writes, “is not concentrated on a thin foil but built up throughout the insulation thickness”. A cut or an open joint therefore lets moisture reach the cold copper.
04 · Installation

Eight Armacell rules that are not up for debate

Taken from the North American application manual (2015), the European manual (2022) and the know-how sheet on bends (2020). The words in quotation marks are Armacell’s.

1

Push, never pull

“Always push the Armaflex tube over the pipe”: pulling the insulation along the pipe can tear it.

North American manual 2015, p. 17; know-how sheet 2020
2

Never stretched

Glued surfaces are pressed together, never pulled. A stretched tube thins out and its joints end up opening.

European manual 2022, p. 9; North American manual, p. 22
3

Every joint glued with 520

“Seal all joints with Armaflex 520 adhesive”: butt joints, slits and ends. Tacky in 1 to 5 minutes, full strength in 36 hours.

North American manual, p. 22; 520 sheet (2018)
4

No glue below 4 °C

The 520 sheet sets application at 40 °F (4 °C) minimum; the European manual aims for 15 to 20 °C and forbids the adhesive below 0 °C.

520 sheet (2018); European manual 2022, p. 8
5

Elbows are cut, not bent

With a 1/2 in wall or thicker, the insulation is not slid around a bend: a mitred fitting cover is required. Bent, the insulation no longer reaches the intended thickness.

North American manual, p. 17
6

Outdoors, the insulation gets protected

“Painting with WB Finish or other protective jacketing is required”: bare foam does not stay in the sun. The European manual allows three days at most without protection.

Tube sheet 2021; European manual 2022, p. 5
7

The tape finishes, it does not hold

Self-adhesive tape is never the sole fixing of a butt joint or a seam: glue first, tape second.

European manual 2022, p. 5
8

Never on a system in operation

“Never insulate plant and systems that are in operation.” And the adhesive is highly flammable (flash point below 20 °F): away from any flame, in a ventilated space.

European manual 2022, p. 5; 520 sheet
Our installations

9 published installations mention Armaflex insulation

Wall-mounted and central heat pump installations where our technicians name the insulation fitted on the line. These are published articles, not a count of jobs.

See all our installations

AirGreen × Armacell6 ft tubeJoint-free roll36 × 48 in sheetTape and 520 adhesivePrice on quotationMontréal · Laval · Longueuil · South Shore · North Shore
05 · Warranty and programs

What Armacell warrants, what the programs cover, what the Code requires

Checked on Armacell’s documents and on the programs’ own sites, October 26, 2026.

Armacell warranty
  • Armacell publishes no fixed-term warranty on these products for North America: its sheets carry only a disclaimer. So we show no duration.
  • Armacell’s data sheets place the responsibility for a professional, correct installation that meets building regulations with the customer (the buyer).
  • No labour or performance warranty is shown here.
What the Code requires
  • Buildings under Chapter I.1 (NECB 2020, in force since July 13, 2024): article 5.2.5.3 requires heating and cooling piping to be insulated per Table 5.2.5.3, except, among others, pipes within a dwelling unit’s conditioned space. Thickness on quotation.
  • Houses: follow the heat pump installation manual for which lines to insulate and how thick.
  • Flame and smoke: the National Building Code (art. 3.6.5.5) sets the indices of pipe insulation by location and building type; Armaflex’s values are on Armacell’s sheet (below 25 / below 50, CAN/ULC S102 through 1 in).
LogisVertDoes not apply

Hydro-Québec’s guide (v1.10, Sept. 15, 2026) only covers roof insulation and air sealing. The heat pump itself may qualify: see its brand page.

ENERGY STARNo certification

In Canada, insulation products are not eligible for ENERGY STAR certification (NRCan).

RénoclimatDoes not apply

Building envelope insulation only (roof, walls, foundations) under the October 1, 2026 rules.

Chauffez vertEnded

Assistance ended March 31, 2026.

Greener HomesClosed

Federal grant and loan closed to new applications.

Armacell in brief. Inventor of flexible foam for equipment insulation: ArmaFlex dates from 1954. Headquartered in Luxembourg; 26 plants in 20 countries and more than 3,100 employees (July 2026 release). In the Americas, four plants in the United States, one in Canada (Brampton, Ontario) and one in Brazil; the North American plants are ISO 9001 certified. Armacell writes “AP ArmaFlex®”; our product sheets keep “Armaflex”.
06 · FAQ

Frequently asked questions about Armaflex insulation

Which insulation size do I need?

The size of the copper tube to cover: a 3/8 in tube takes 3/8 in insulation. What our product sheets call “pipe size” is the insulation’s inside diameter at Armacell.

Which wall thickness should I choose?

We offer three tube walls (3/8, 1/2 and 3/4 in). Armacell publishes no table by climate or humidity: it points to its ArmaWin software. The wall is chosen on site, from the heat pump manual and the location. On quotation.

Do both lines need insulation?

Follow the heat pump installation manual. The suction line, the larger one, is cold in cooling: it is the one that sweats. On a heat pump the liquid line changes temperature with the mode, and many manuals ask for it to be insulated too.

6 ft tube or roll?

The roll covers a long line in one piece, with no butt joint, but in our shop only in 3/8 in wall and up to 7/8 in pipe. The tube comes in three walls and up to 3-1/8 in, and every joint is glued with 520. The tool in section 02 counts your joints.

Can Armaflex be installed in winter?

The insulation, yes; the glue has a limit. The 520 sheet sets application at 40 °F (4 °C) minimum, and Armacell’s European manual aims for 15 to 20 °C, never below 0 °C.

Does Armaflex withstand the sun?

Not bare. Armacell writes that outdoors, WB Finish paint or protective jacketing is required to prevent damage to the insulation; its European manual allows three days at most without protection. Neither the paint nor the jacketing is in the shop: write to us.

Is the tape enough to close a joint?

No. Armacell’s European manual rules out self-adhesive tape as the sole fixing of a butt joint or seam. Glue first with 520; the tape finishes exposed joints and small fittings.

Does it burn?

Armacell’s sheets give flame spread and smoke developed indices below 25 and below 50 (ASTM E84, UL 723), with CAN/ULC S102 through 1 in wall, and UL 94 5VA and V-0 from 1/4 in. The Code sets the required indices by location. The 520 adhesive, for its part, is highly flammable.

What about mould?

According to Armacell, AP ArmaFlex passed UL 181 (mould) and ASTM G21 and C1338 (fungi), and is made with MICROBAN antimicrobial protection.

Is there a grant for the insulation?

None among the programs checked on October 26, 2026: LogisVert only covers roof insulation, ENERGY STAR certifies no insulation in Canada, Rénoclimat covers the envelope, Chauffez vert has ended and the federal program is closed. The heat pump itself may qualify for LogisVert.

What is the warranty?

Armacell publishes no fixed-term warranty for North America on these products; its sheets carry only a disclaimer. So we show no duration.

Do you sell WB Finish paint or outdoor jacketing?

Not in the shop. The five Armacell products online are the tube, the roll, the sheet, the tape and the adhesive. For outdoor protection, write to us.

How do I order?

All five products are priced on quotation. Write to us or call with the pipe size, the wall and the quantity; the tool in section 01 gives you each variant’s code.

Who is Armacell?

The inventor of flexible foam for equipment insulation, with ArmaFlex in 1954. Headquartered in Luxembourg, 26 plants in 20 countries, one Canadian plant in Brampton, Ontario.

AirGreen · Montréal, Laval, Longueuil, South Shore and North Shore

Give us the size and the length; we will tell you what to order

Free quote on Armacell products across Greater Montréal. Price on quotation.

Ask for a quote514 316-2973
Showroom1370, rue Joliot-Curie, local 712, Boucherville
HoursMon. to Thu. 8 a.m. to 6 p.m. · Fri. 8 a.m. to 4 p.m.
RBQ 5645-9605-01Subclasses 15.8, 15.10 and 16
See alsoPipe insulation · All our products

Sources checked October 26 and 27, 2026

  1. Armacell — Technical Data AP/ArmaFlex + AP/ArmaFlex FS (Americas), USCode12346 | TDS | 032024, read Oct. 26, 2026
  2. Armacell — AP ArmaFlex Black and White Tube Insulation, Tube TDS 102021 | NA | EN-A | 107 (distributor copy)
  3. Armacell — AP ArmaFlex Sheet and Roll Insulation, TDS 082018 | NA | EN-A | 015 (distributor copy)
  4. Armacell — Technical Data Armaflex Coil, Tube Submittal 024 Eng/USA 2/2015 (distributor copy)
  5. Armacell — ArmaFlex 520 Adhesive, TDS 082018 | NA | EN-A | 083 (distributor copy)
  6. Armacell — AP ArmaFlex Insulation Tape, TDS 032020 | NA | EN-A | 016 (distributor copy)
  7. Armacell — North American Application Manual, Pipes and Fittings, 200 Eng/USA 9/2015 (distributor copy)
  8. Armacell — ArmaFlex Application Manual, EMEA, 02022 (European manual, local.armacell.com)
  9. Armacell — Know-How “Stay ahead of the curve”, installing ArmaFlex on bends, 082020
  10. Armacell — Mechanical insulation of refrigeration equipment (dew point, vapour barrier), read Oct. 26, 2026
  11. Armacell — AP/ArmaFlex (Americas) brochure 062024: 520 adhesive formats, ISO 9001
  12. Armacell — 2024 press kit (ArmaFlex 1954, Brampton); 2023 annual report (Luxembourg); July 14, 2026 release (26 plants, 20 countries); June 5, 2025 Americas release
  13. Hydro-Québec — LogisVert participation guide, residential customers, version 1.10 of September 15, 2026
  14. NRCan — ENERGY STAR Canada, “Other products”: insulation products not eligible for certification in Canada, read Oct. 26, 2026
  15. Québec — Rénoclimat (rules of October 1, 2026); Chauffez vert (ended March 31, 2026); NRCan — Canada Greener Homes Grant and Loan (closed), read Oct. 26, 2026
  16. RBQ — Chapter I.1 of the Construction Code (NECB 2020) in force July 13, 2024; NRC — intent statements of articles 5.2.5.3 (NECB) and 3.6.5.5 (NBC)

Armacell, ArmaFlex and MICROBAN are trademarks of their owners. AirGreen sells these products; the figures are the manufacturer’s, quoted as published.

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The five Armaflex products, right below.

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