Morel Acudamp MAT HOOD 621 Review: The 6 mm Bonnet Liner for Engine Noise and Heat
The Morel Acudamp MAT HOOD 621 is a bonnet liner: a single 6 mm sheet measuring 1000 x 1400 mm, which our listing describes as a premium hood liner acoustic treatment for noise and vibration control and thermal insulation. Its Indian MRP is ₹5,990, the lowest of the Acudamp sheet products we list, and an Australian retailer gives its coverage as 1.40 m². It suits owners who want to cut engine noise and under-bonnet heat soak, or who are treating the whole car and want the bonnet done with a purpose-made sheet. See it on our Morel Acudamp MAT HOOD 621 product page.
Quick summary
One 1000 x 1400 mm sheet, 6 mm thick, listed as a hood liner for noise and vibration control and thermal insulation.
Our listing describes three layers (adhesive, butyl, aluminium); Frankies Auto Electrics in Australia lists four, including foam. Confirm the construction with us if it matters to you.
No working temperature range is published in the sources we read, which matters more under a bonnet than anywhere else.
We found no owner reviews when we checked in October 2026.
Morel Acudamp MAT HOOD 621 specifications
Specification | Morel Acudamp MAT HOOD 621 |
|---|---|
Type | Premium hood liner acoustic treatment |
Construction (our listing) | Triple layer: adhesive, butyl, aluminium |
Construction (one retailer) | Quad layer: adhesive, foam, aluminium, butyl |
Thickness | 6 mm |
Sheet size | 1000 x 1400 mm (39.4 x 55.1 in) |
Pack | 1 sheet |
Coverage | 1.40 m², per one retailer |
Working temperature, mass, loss factor | Not published |
India MRP | ₹5,990 |
Our listing supplies the type, thickness, size and our construction line; Frankies Auto Electrics supplies the coverage and the four-layer description. We found no Morel page for this model, and Morel's website wasn't loading when we checked.
What a bonnet liner does
The bonnet is a large, thin steel panel sitting directly above the engine. It picks up engine vibration and radiates it as noise, and in traffic it soaks up heat from below as well as sun from above. A liner bonded to its underside adds mass and stiffness to the panel, cutting resonance, and an insulating layer slows the heat moving through it.
Our listing describes the MAT HOOD 621 for noise and vibration control and thermal insulation, and Frankies' listing describes it as conforming and bonding to sheet metal for noise and heat control. Neither gives figures for how much noise or heat it removes, so expect a refinement rather than a transformation, and remember that engine noise also reaches the cabin through the firewall and floor.
Three layers or four?
This is the one inconsistency to know about. Our listing says triple layer, adhesive, butyl and aluminium, the same make-up as the thinner Acudamp mats. Frankies lists quad layers of adhesive, foam, aluminium and butyl. We found no Morel description to settle it, so if the exact construction matters for your project, ask us to confirm before ordering.
How it compares with the rest of the Acudamp range
The other Acudamp sheets are cut to 460 x 800 mm and sold in packs: the MAT 345.5 is 4.5 mm and four layers in five sheets covering 1.84 m², while the MAT 221.10 and MAT 227.8 are thinner triple-layer damping mats. The MAT HOOD 621 is the only one we list as a hood liner and the only one supplied as a single large sheet, which reduces joins across a bonnet's underside.
For doors, floors and the boot, the 460 x 800 mm sheets are easier to handle; for the bonnet, the large single sheet is the purpose-listed choice.
What owners and reviewers say about the Morel Acudamp MAT HOOD 621
We found no owner or professional reviews of the MAT HOOD 621 when we checked in October 2026. Frankies Auto Electrics' listing invited buyers to be the first to review it, and we found no other listing or forum discussion naming it. The only related Indian comment is general: a Team-BHP member in January 2025 recommended Morel sheets bought on offer from a trusted online source for the best value, without naming a model, and that comment wasn't about bonnets. If you've fitted the MAT HOOD 621, we'd like to hear what difference you noticed.
Who should buy it, and who shouldn't
Buy it if engine noise and under-bonnet heat are what bother you, or if you're doing a complete treatment and want the bonnet covered with a sheet made for the job.
Skip it if your aim is better sound from new speakers, where door damping such as the MAT 221.10 matters far more, or if your car's bonnet already has a factory insulation pad you're happy with and no room for more.
Installation notes for Indian cars
Measure the underside of your bonnet first, since bonnets vary and one sheet is what you get. If there's a factory insulation pad, note how its clips fit before removing it. Degrease the steel thoroughly, because engine-bay grime ruins adhesion, then cut the sheet to fit between the bracing ribs and roll it firmly. Keep it clear of the latch, hinges, washer jets and any gas struts, and check that the bonnet still closes with clearance above the engine cover.
Under-bonnet heat is serious in an Indian summer, especially in stop-start traffic, and no working temperature range is published in the sources we read. Frankies says only that the adhesive lasts even at extreme temperatures. Careful preparation is your best insurance. VA3 Car Studio in Ghaziabad offers professional installation, and our guide on how to apply sound damping properly covers the general principles.
Price and where to buy
The Morel Acudamp MAT HOOD 621 has an MRP of ₹5,990 for one 1000 x 1400 mm sheet. VA3 Car Studio often sells below MRP, so check today's price on the MAT HOOD 621 product page. Everything we sell is a genuine Morel product.
The bottom line
The Morel Acudamp MAT HOOD 621 is the Acudamp product we list for the bonnet: one large 6 mm sheet for engine noise and heat. The gaps are a construction description that differs between our listing and one overseas retailer, no published temperature range and no owner feedback. Measure your bonnet, prepare the surface well, and confirm the construction with us if it matters.
Morel Acudamp MAT HOOD 621 FAQ
Is the Morel Acudamp MAT HOOD 621 three layers or four?
Our listing describes three layers: adhesive, butyl and aluminium. Frankies Auto Electrics in Australia lists four: adhesive, foam, aluminium and butyl. We found no Morel description to settle it, so ask us to confirm before ordering if it matters.
Will one sheet cover my bonnet?
The sheet is 1000 x 1400 mm, which one retailer gives as 1.40 m² of coverage. Bonnets vary, so measure the underside of yours, allowing for the bracing ribs, before you buy.
Does it cope with engine heat?
No working temperature range is published in the sources we read. One retailer says the adhesive lasts even at extreme temperatures, without figures, so thorough degreasing and firm rolling matter.
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